Method for controlling herbicide-resistant plants

Description

FIELD OF THE INVENTION

Disclosed herein are polynucleotide molecules for regulating genes in plants and methods of making and using such molecules.

BACKGROUND

The failure of herbicides to control resistant weeds is a problem especially when such weeds are growing in field of herbicide resistant crops that may have lower herbicide resistance than the weed. Herbicide-resistant weeds are identified with a variety of modes of action. Resistance resulting from selection for multiple copies of genes producing herbicide targeted proteins in pigweed is reported by Gaines et al. (2010) Proc. Natl. Acad. Sci. USA, 107(3):1029-1034. Resistance resulting from mutations in genes producing herbicide targeted proteins in goosegrass, prickly lettuce, and ryegrass are reported by Baerson et al. (2002) Plant Physiol., 129(3):1265-1275; Preston et al. (2006) Pesticide Biochem. Physiol., 84(3):227-235; and Wakelin et al. (2006) Weed Res. (Oxford), 46(5):432-440. Vacuolar sequestration of glyphosate is an observed mechanism in glyphosate resistant horseweed; see Ge et al. (2010) Pest Management Sci., 66:576-576. Resistance resulting from expression of enzymes that metabolize herbicides to an inactive chemical form in hairy crabgrass is reported by Hidayat et al. (1997) Pesticide Biochem. Physiol., 57(2):137-146. Reddy et al. (2008) J. Agric. Food Chem., 56(6):2125-2130 reported the accumulation of aminomethylphosphonic acid in plant species treated with glyphosate.

SUMMARY OF THE INVENTION

This invention provides polynucleotide molecules and methods for regulating genes in plants, e.g., by providing RNA for systemic regulation of genes. Various aspects of the invention provide polynucleotide molecules and methods for regulating endogenous genes and transgenes in a plant cell and polynucleotide molecules. The polynucleotides, compositions, and methods disclosed herein are useful for regulating endogenous genes of a plant pest or pathogen. In an aspect of the invention, the polynucleotide molecules are provided in compositions that can permeate or be absorbed into living plant tissue to initiate systemic gene silencing of endogenous genes or transgenes, or of their transcribed RNA. In some aspects of the invention polynucleotide molecules ultimately provide to a plant, or allow the production in cells in a plant, RNA that is capable of hybridizing under physiological conditions in a plant cell to RNA transcribed from a target endogenous gene or target transgene in the plant cell, thereby effecting regulation of the target gene, e.g., silencing or suppression of the target gene. In other aspects of the invention polynucleotide molecules disclosed herein are useful also for ultimately providing to a plant, or allowing the production in cells of a plant, RNA that is capable of hybridizing under physiological conditions to RNA transcribed from a target gene in a cell of an invertebrate pest or of a viral pathogen of the plant, thereby effecting regulation of the target gene, e.g., silencing or suppression of the target gene. In some aspects, the silencing or suppression of the target gene leads to the upregulation of another gene that is itself affected or regulated by the target gene's expression.

The compositions and methods of this invention are believed to operate through one or more of the several natural cellular pathways involved in RNA-mediated gene suppression as generally described in reviews by Brodersen and Voinnet (2006), Trends Genetics, 22:268-280; Tomari and Zamore (2005) Genes & Dev., 19:517-529; Vaucheret (2006) Genes Dev., 20:759-771; Meins et al. (2005) Annu. Rev. Cell Dev. Biol., 21:297-318; and Jones-Rhoades et al. (2006) Annu. Rev. Plant Biol., 57:19-53. RNA-mediated gene suppression generally involves a double-stranded RNA (dsRNA) intermediate that is formed intramolecularly within a single RNA molecule or intermolecularly between two RNA molecules. This longer dsRNA intermediate is processed by a ribonuclease of the RNase III family (Dicer or Dicer-like ribonuclease) to one or more shorter double-stranded RNAs, one strand of which is incorporated into the RNA-induced silencing complex (“RISC”). For example, the siRNA pathway involves the cleavage of a longer double-stranded RNA intermediate to small interfering RNAs (“siRNAs”). The size of siRNAs is believed to range from about 19 to about 25 base pairs, but the most common classes of siRNAs in plants include those containing 21 base pairs or 24 base pairs. See, Hamilton et al. (2002) EMBO J., 21:4671-4679. As used herein, “oligonucleotide” means a polynucleotide molecule having a length of 18-25 nucleotides, similar to the size of processed small RNA molecules in gene silencing mechanisms. Various embodiments of this invention include compositions including oligonucleotides or polynucleotides or a mixture of both.

Aspects of the invention include compositions and methods for: providing single-stranded RNA molecules in a plant cell for systemic regulation of genes; herbicidal treatment with compositions including surfactant and a plant lethal agent which provides single-stranded RNA for suppression of an endogenous gene in a plant cell; topical coating onto a plant surface including a surfactant (e.g., an organosilicone surfactant) and an oligonucleotide or polynucleotide molecule for suppression of an endogenous gene in a plant cell; topically applied compositions for inducing systemic silencing of a target gene in a plant including (a) an agent for conditioning of a plant to permeation by polynucleotides and (b) polynucleotide molecules; and, herbicidal treatment with compositions including (a) an agent for conditioning of a plant to permeation by polynucleotide molecules, (b) polynucleotide molecules. Optionally these compositions can include a non-nucleotide herbicide.

In other aspects the invention provides methods for: controlling herbicide-resistant volunteer plants; investigating reverse genetics by modulating an endogenous gene in a plant by applying onto tissue of a growing plant a composition for providing single-stranded RNA molecules in a plant cell for systemic regulation of genes; inducing systemic silencing of a target gene including topical application of polynucleotides to a plant; inducing systemic silencing of a target gene in a plant by (a) conditioning of a plant to permeation by polynucleotides and (b) topically applying polynucleotides to the plant; investigating reverse genetics by modulating an endogenous gene in a plant by topically applying onto a living plant a topically applied composition including polynucleotide molecules and an agent for conditioning of a plant to permeation by such polynucleotide molecules.

In other aspects the invention provides a plant with exogenous DNA or RNA for suppressing an endogenous gene, where the exogenous DNA is not integrated into a chromosome of the plant, the exogenous RNA is not transcribed from DNA integrated into a chromosome of the plant, and the endogenous gene is suppressed by topical application of a polynucleotide to the plant. These and other aspects of the invention are described in greater detail in the following sections.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 presents SEQ ID NO:1, a nucleotide sequence encoding Palmer amaranth EPSPS.

FIG. 2 presents SEQ ID NO:3 which is a nucleotide sequence of a synthesized Pol III gene.

FIG. 3 illustrates the morbidity of Palmer amaranth plants treated with a dsRNA. FIG. 3A depicts the plants 7 days after the glyphosate treatment. FIG. 3B depicts surfactant-treated plants that were treated with the long dsRNA solution followed by glyphosate treatment after 72 hours. FIG. 3C depicts surfactant-treated plants that were treated with the short dsRNA solution followed by glyphosate treatment after 72 hours.

FIG. 4 illustrates the bleaching in Nicotiana benthamiana plants treated with a dsRNA composition.

FIG. 5 presents SEQ ID NO:2 which is a nucleotide sequence of a Nicotiana benthamiana phytoene desaturase.

FIG. 6 illustrates 5′-Alexa Fluor 488-labelled anti-sense ssDNA oligonucleotides (SEQ ID NO:15) permeating glyphosate-resistant Palmer amaranth leaves as described in Example 9.

FIG. 7 depicts results of EPSPS mRNA measured in glyphosate-resistant Palmer amaranth leaves treated with anti-sense ssDNA oligonucleotides for EPSPS as described in Example 9. Bars represent replicate experiments for each of treatments #1-#4 (indicated by the numbers enclosed in circles and referring to Table 2) and for controls (leaves permeated with anti-sense ssDNA oligonucleotides for a barley seed protein, SEQ ID NO:14, treated with or without glyphosate).

FIG. 8 depicts results of EPSPS protein measured in glyphosate-resistant Palmer amaranth leaves topically treated with anti-sense ssDNA oligonucleotides for EPSPS as described in Example 9; treatments are indicated by the numbers enclosed in circles and refer to Table 2.

FIG. 9 depicts results of shikimate accumulation measured in glyphosate-resistant Palmer amaranth leaves treated with anti-sense ssDNA oligonucleotides for EPSPS in two experiments as described in Example 9; treatments are indicated by the numbers enclosed in circles and refer to Table 2.

FIG. 10 depicts the nucleotide sequence of a Nicotiana benthamiana phytoene desaturase (SEQ ID NO:2).

FIG. 11 schematically depicts the location of the sequences of assayed oligonucleotides and polynucleotides (see Table 3) in relation to the phytoene synthase sequence (SEQ ID NO:16) as described in Example 10.

FIG. 12A illustrates apical leaf bleaching in Nicotiana benthamiana plants topically treated with buffer (“Control”), a 200-mer dsRNA polynucleotide with an RNA sequence corresponding to the segment consisting of nucleotides 914-1113 of SEQ ID NO:2 (“200 nt dsRNA”), and a combination of single-stranded DNA oligonucleotides and polynucleotides (SEQ ID NOs:16, 17, 20, 21, 24, 25, and 26) (“ssDNA oligos”) as described in Example 10. FIG. 12B illustrates results of northern blot analysis of RNA isolated from Nicotiana benthamiana plants treated with buffer (control), the 200-mer dsRNA polynucleotide, and the ssDNA oligonucleotides. Also shown is RNA isolated from plants that had been stressed by being kept at 4 degrees Celsius and in the dark overnight prior to treatment with the 200-mer dsRNA polynucleotides.

FIG. 13 illustrates apical leaf bleaching in Nicotiana benthamiana plants topically treated in duplicate with various combinations of polynucleotides or oligonucleotides (numbers refer to the treatments listed in Table 4) as described in Example 10. The control (Treatment 13 in Table 4) plants are not shown.

FIG. 14 illustrates apical leaf bleaching in Nicotiana benthamiana plants topically treated with the polynucleotides listed in Table 5 as described in Example 10.

FIG. 15 illustrates apical leaf bleaching observed in Nicotiana benthamiana plants after topical treatment with the PDS 21-mer anti-sense ssDNA (SEQ ID NO:34, “21nt PDS anti-sense”) or with previously assayed PDS anti-sense 22-mer oligonucleotides without a T7 promoter (SEQ ID NOs:22 and 23) (“PDS anti-sense”). Little or no visible bleaching of apical leaves was observed after topical treatment with the buffer only or after topical treatment with PDS 21-mer sense ssDNA (SEQ ID NO:36, “21nt PDS sense”) as described in Example 10.

FIG. 16 illustrates an alignment of the Palmer amaranth and Nicotiana benthamiana PDS DNA sequences showing about 71% identity (1252/1762) as described in Example 11.

FIG. 17 illustrates apical leaf bleaching observed in Palmer amaranth plants topically treated with 678 bp or 198 bp Palmer PDS dsRNA but not in Palmer amaranth plants topically treated with a 260 base pair dsRNA of corn root worm gene as described in Example 11.

FIG. 18A illustrates bleaching of apical leaves, stems, and flowers of Nicotiana benthamiana plants topically treated first with a surfactant solution and then with an ssDNA PDS oligonucleotide to induce systemic silencing of phytoene desaturase as described in Example 12. FIG. 18B illustrates bleaching of apical leaves, stems, and flowers of Nicotiana benthamiana plants topically treated with an ssDNA PDS oligonucleotide to induce systemic silencing of phytoene desaturase, with or without conditioning with a surfactant solution, as described in Example 12.

FIG. 19 illustrates results of assays on different glyphosate-resistant Palmer amaranth lines (3 plants per replicate) treated with the conditions listed in Table 6, as described in Example 13. Photographs were taken at 7 days after glyphosate treatment (experiments 1-6) or at 9 days after glyphosate treatment (experiments 7-9).

FIG. 20 illustrates location of two small RNAs identified as abundant in EPSPS dsRNA-treated Palmer amaranth plants and which are shown as italicized underlined nucleotides at positions 564-588 and 743-767 of the full-length EPSPS (SEQ ID NO:40), as described in Example 14. The EPSPS sequence also shows the location of the four oligonucleotide-size “short” EPSPS dsRNA molecules (underlined, non-italicized text) and the three “long” double-stranded RNA polynucleotides (bolded text as described in Example 1.

FIG. 21A illustrates results of treating Palmer amaranth plants with surfactant followed by dsRNA at one of three application amounts, followed by herbicide, as described in Example 17. FIG. 21B illustrates results of assay 1 carried out on glyphosate-resistant Palmer amaranth grown from field-collected seeds as described in Example 17; plants are shown at 8 days and 30 days after treatment with herbicide.

FIG. 22 illustrates results obtained from treating Palmer amaranth with tallowamine surfactant and ammonium sulfate or with transfection reagents, as described in Example 18.

FIG. 23 illustrates results of treating glyphosate-resistant Palmer amaranth plants with either EPSPS dsRNAs or EPSPS DNA/RNA hybrids, as described in Example 19.

FIG. 24 illustrates results of treating glyphosate-resistant Palmer amaranth plants with either EPSPS dsRNA or EPSPS ssDNA polynucleotides, as described in Example 20. The upper photography was taken at 8 days after herbicide spray and the lower (bar) graph presents the results as a glyphosate injury (GI) scored 8 days after herbicide spray.

FIG. 25A illustrates twelve dsRNA polynucleotides corresponding to DNA segments of approximately 250 bp each covering in a tiling manner the full coding sequence and part of the 5′ and 3′ untranslated regions of the Palmer EPSPS gene, as described in Example 21; the four oligonucleotide-size “short” EPSPS dsRNA molecules as described in Example 1 and FIG. 1 are located in the tiling segments 2, 3, 4, and 8 respectively, and are shown as light grey bars within those segments. FIG. 25B and FIG. 25C illustrates results of treating glyphosate-resistant Palmer amaranth plants with dsRNAs designed from these tiling segments or the four “short” dsRNA molecules or buffer.

FIG. 26 illustrates results of treating glyphosate-resistant Palmer amaranth plants with glyphosate followed by spraying with 1% SILWET L-77® brand surfactant followed by application of EPSPS dsRNA in buffer containing 2% ammonium sulfate, as described in Example 22. Untreated (“UT”) control plants were treated only with the 1% SILWET L-77® brand surfactant spray but not with herbicide or dsRNA. Plants were photographed and rated at 16 days after treatment.

FIG. 27 illustrates results of treating a field population of high copy number glyphosate-resistant Palmer amaranth with a composition containing a 20× or 100× amount of EPSPS dsRNA polynucleotides, surfactant, ammonium sulfate, and herbicide or with a composition containing, surfactant, ammonium sulfate, and herbicide, as described in Example 23. For each treatment, two replicate 1 foot by 5 foot plots were treated.

FIG. 28 depicts the progression of bleaching and death of the lettuce plants treated with 1 nanomole ssDNA per plant at (from top to bottom) 37, 46, and 60 days after treatment, as described in Example 24.

FIG. 29A illustrates systemic silencing in lettuce plants evidenced by bleaching observed at 4 or 12 days after topical treatment with polynucleotides, as described in Example 24. FIG. 29B depicts the systemic silencing evidenced by bleaching observed at 4 after topical treatment with the four individual anti-sense ssDNAs (“HL287”, SEQ ID NO:43; “HL288”, SEQ ID NO:44; “HL289”, SEQ ID NO:45; and “HL290”, SEQ ID NO:46) or with a mixture of all four.

FIG. 30 illustrates bleaching of leaves (right top panel) and flowers (right middle panel) of tomato plants treated with tomato phytoene desaturase polynucleotides, as described in Example 25. FIG. 30 also illustrates the stunting of the tomato plants treated with PDS polynucleotides (lower panel).

FIG. 31 illustrates enhancement of glyphosate herbicidal activity in low-copy number Palmer amaranth of the EPSPS polynucleotides by TIF polynucleotides and that the TIF polynucleotides have herbicidal activity on their own, as described in Example 26. EPSPS polynucleotides “1, 3, 4” refer to “short” dsRNAs having an anti-sense strand that is capable of hybridizing to the mRNA transcribed from the Palmer amaranth EPSPS gene (SEQ ID NO:1) at positions 14-38 (short dsRNA-1), 345-369 (short dsRNA-3), and 1105-1129 (short dsRNA-4), respectively as indicated by underlined nucleotides in FIG. 1 (see Example 1). EPSPS “5” refers to IDT [5] (SEQ ID NOS:91-92 as described in Table 11).

FIG. 32 illustrates enhancement of glyphosate herbicidal activity in high-copy number Palmer amaranth of the EPSPS polynucleotides by TIF polynucleotides and that the TIF polynucleotides have herbicidal activity on their own, as described in Example 26. EPSPS polynucleotides “1, 3, 4” refer to “short” dsRNAs having an anti-sense strand that is capable of hybridizing to the mRNA transcribed from the Palmer amaranth EPSPS gene (SEQ ID NO:1) at positions 14-38 (short dsRNA-1), 345-369 (short dsRNA-3), and 1105-1129 (short dsRNA-4), respectively as indicated by underlined nucleotides in FIG. 1 (see Example 1). EPSPS “5” refers to IDT [5] (SEQ ID NOS:91-92 as described in Table 11).

FIG. 33 illustrates the herbicidal effect on Palmer amaranth after treatment with the indicated combinations of non-polynucleotide herbicides and polynucleotides, as described in Example 28.

FIG. 34 illustrates an alignment of the Nicotiana benthamiana PDS locus 1 promoter (SEQ ID NO:319) and PDS locus 2 promoter (SEQ ID NO:320), as described in Example 30.

FIG. 35 schematically illustrates the Nicotiana benthamiana PDS locus 1 and locus 2 promoters and the regions targeted by mixtures of polynucleotides, as described in Example 30.

FIG. 36 illustrates the effect on plant height in Nicotiana benthamiana in plants treated with a PDS anti-sense polynucleotide (FIG. 36A), EPSPS anti-sense polynucleotides (FIG. 36B), or RuBisCO anti-sense polynucleotides (FIG. 36C), as described in Example 33.

FIG. 37 illustrates the effect on Zea mays (Gaspe) monocot plants by topical treatment with dsRNA polynucleotides (“EPSPS DNA oligo”) targeting the endogenous EPSPS gene, or with buffer alone as a control, as described in Example 34.

FIG. 38 illustrates the effect of varying glyphosate counter-ions on herbicidal activity on glyphosate-resistant Palmer amaranth plants, as described in Example 35.

FIG. 39 illustrates the effect of the polyamines spermine (“SPM”) and spermidine (“SPMD”) or ammonium sulfate (“AMS”) on glyphosate-resistant Palmer amaranth containing 33, 36, or 57 copies of EPSPS, as described in Example 35. “fb 4× WM” means “followed by treatment with glyphosate (3360 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide)”.

DETAILED DESCRIPTION OF THE INVENTION

Unless otherwise stated, nucleic acid sequences in the text of this specification are given, when read from left to right, in the 5′ to 3′ direction. Nucleic acid sequences may be provided as DNA or as RNA, as specified; disclosure of one necessarily defines the other, as is known to one of ordinary skill in the art. Where a term is provided in the singular, the inventors also contemplate aspects of the invention described by the plural of that term. By “non-transcribable” polynucleotides is meant that the polynucleotides do not comprise a complete polymerase II transcription unit. As used here “solution” refers to homogeneous mixtures and non-homogeneous mixtures such as suspensions, colloids, micelles, and emulsions.

Polynucleotides

As used herein, “polynucleotide” refers to a nucleic acid molecule containing multiple nucleotides and generally refers both to “oligonucleotides” (a polynucleotide molecule of 18-25 nucleotides in length) and polynucleotides of 26 or more nucleotides. Embodiments of this invention include compositions including oligonucleotides having a length of 18-25 nucleotides (e.g., 18-mers, 19-mers, 20-mers, 21-mers, 22-mers, 23-mers, 24-mers, or 25-mers), or medium-length polynucleotides having a length of 26 or more nucleotides (e.g., polynucleotides of 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, about 65, about 70, about 75, about 80, about 85, about 90, about 95, about 100, about 110, about 120, about 130, about 140, about 150, about 160, about 170, about 180, about 190, about 200, about 210, about 220, about 230, about 240, about 250, about 260, about 270, about 280, about 290, or about 300 nucleotides), or long polynucleotides having a length greater than about 300 nucleotides (e.g., polynucleotides of between about 300 to about 400 nucleotides, between about 400 to about 500 nucleotides, between about 500 to about 600 nucleotides, between about 600 to about 700 nucleotides, between about 700 to about 800 nucleotides, between about 800 to about 900 nucleotides, between about 900 to about 1000 nucleotides, between about 300 to about 500 nucleotides, between about 300 to about 600 nucleotides, between about 300 to about 700 nucleotides, between about 300 to about 800 nucleotides, between about 300 to about 900 nucleotides, or about 1000 nucleotides in length, or even greater than about 1000 nucleotides in length, for example up to the entire length of a target gene including coding or non-coding or both coding and non-coding portions of the target gene). Where a polynucleotide is double-stranded, its length can be similarly described in terms of base pairs.

Polynucleotide compositions used in the various embodiments of this invention include compositions including oligonucleotides or polynucleotides or a mixture of both, including RNA or DNA or RNA/DNA hybrids or chemically modified oligonucleotides or polynucleotides or a mixture thereof. In some embodiments, the polynucleotide may be a combination of ribonucleotides and deoxyribonucleotides, e.g., synthetic polynucleotides consisting mainly of ribonucleotides but with one or more terminal deoxyribonucleotides or synthetic polynucleotides consisting mainly of deoxyribonucleotides but with one or more terminal dideoxyribonucleotides. In some embodiments, the polynucleotide includes non-canonical nucleotides such as inosine, thiouridine, or pseudouridine. In some embodiments, the polynucleotide includes chemically modified nucleotides. Examples of chemically modified oligonucleotides or polynucleotides are well known in the art; see, e.g., Verma and Eckstein (1998) Annu. Rev. Biochem., 67:99-134. For example, the naturally occurring phosphodiester backbone of an oligonucleotide or polynucleotide can be partially or completely modified with phosphorothioate, phosphorodithioate, or methylphosphonate internucleotide linkage modifications, modified nucleoside bases or modified sugars can be used in oligonucleotide or polynucleotide synthesis, and oligonucleotides or polynucleotides can be labelled with a fluorescent moiety (e.g., fluorescein or rhodamine) or other label (e.g., biotin).

The polynucleotides can be single- or double-stranded RNA or single- or double-stranded DNA or double-stranded DNA/RNA hybrids or modified analogues thereof, and can be of oligonucleotide lengths or longer. In more specific embodiments of the invention the polynucleotides that provide single-stranded RNA in the plant cell are selected from the group consisting of (a) a single-stranded RNA molecule, (b) a single-stranded RNA molecule that self-hybridizes to form a double-stranded RNA molecule, (c) a double-stranded RNA molecule, (d) a single-stranded DNA molecule, (e) a single-stranded DNA molecule that self-hybridizes to form a double-stranded DNA molecule, and (f) a single-stranded DNA molecule including a modified Pol III gene that is transcribed to an RNA molecule, (g) a double-stranded DNA molecule, (h) a double-stranded DNA molecule including a modified Pol III gene that is transcribed to an RNA molecule, (i) a double-stranded, hybridized RNA/DNA molecule, or combinations thereof. In some embodiments these polynucleotides include chemically modified nucleotides or non-canonical nucleotides. In embodiments of the method the polynucleotides include double-stranded DNA formed by intramolecular hybridization, double-stranded DNA formed by intermolecular hybridization, double-stranded RNA formed by intramolecular hybridization, or double-stranded RNA formed by intermolecular hybridization. In one embodiment the polynucleotides include single-stranded DNA or single-stranded RNA that self-hybridizes to form a hairpin structure having an at least partially double-stranded structure including at least one segment that will hybridize under physiological conditions in the cell to RNA transcribed from the gene targeted for suppression. Not intending to be bound by any mechanism, it is believed that such polynucleotides are or will produce single-stranded RNA with at least one segment that will hybridize under physiological conditions in a cell to RNA transcribed from the gene targeted for suppression. In certain other embodiments the polynucleotides further includes a promoter, generally a promoter functional in a plant, e.g., a pol II promoter, a pol III promoter, a pol IV promoter, or a pol V promoter.

In some embodiments, the polynucleotide compositions are formulated with counter-ions or other molecules that are known to associate with nucleic acid molecules, e.g., tetraalkyl ammonium ions, trialkyl ammonium ions, sulfonium ions, lithium ions, and polyamines such as spermine, spermidine, or putrescine. In some embodiments, the polynucleotide compositions are formulated with a non-polynucleotide herbicide (e.g., the chemical herbicides disclosed herein in the section headed “Herbicide-Tolerance Proteins”) or with a transferring agent or permeability-enhancing agent (see the section headed “Permeability-Enhancing Agents and Treatments”).

The polynucleotides are designed to induce systemic regulation or suppression of an endogenous gene in a plant and are designed to have a sequence essentially identical or essentially complementary to the sequence (which can be coding sequence or non-coding sequence) of an endogenous gene of a plant or to the sequence of RNA transcribed from an endogenous gene of a plant. By “essentially identical” or “essentially complementary” is meant that the polynucleotides (or at least one strand of a double-stranded polynucleotide) are designed to hybridize under physiological conditions in cells of the plant to the endogenous gene or to RNA transcribed from the endogenous gene to effect regulation or suppression of the endogenous gene.

Embodiments of single-stranded polynucleotides functional in this invention have sequence complementarity that need not be 100% but is at least sufficient to permit hybridization to RNA transcribed from the target gene to form a duplex under physiological conditions in a plant cell to permit cleavage by a gene silencing mechanism. Thus, in embodiments the segment is designed to be essentially identical to, or essentially complementary to, a sequence of 18 or more contiguous nucleotides in either the target gene or messenger RNA transcribed from the target gene. By “essentially identical” is meant having 100% sequence identity or at least about 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, or 99% sequence identity when compared to the sequence of 18 or more contiguous nucleotides in either the target gene or RNA transcribed from the target gene; by “essentially complementary” is meant having 100% sequence complementarity or at least about 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, or 99% sequence complementarity when compared to the sequence of 18 or more contiguous nucleotides in either the target gene or RNA transcribed from the target gene. In some embodiments of this invention polynucleotide molecules are designed to have 100% sequence identity with or complementarity to one allele of a given target gene (e.g., coding or non-coding sequence of a gene for an herbicide-tolerance protein, an herbicide-deactivating protein, a stress-response gene, or an essential gene); in other embodiments the polynucleotide molecules are designed to have 100% sequence identity with or complementarity to multiple alleles of a given target gene.

In one aspect of the invention the polynucleotides are modified RNA polymerase III genes, e.g., genes that transcribe 7SL signal recognition particle RNA or U6 spliceosomal RNA (Pol III genes) or polynucleotides containing a functional Pol III promoter sequence. In one embodiment, the polynucleotides are modified Pol III genes containing sense and anti-sense DNA corresponding to RNA of the targeted gene identified for regulation replacing the DNA sequence originally transcribed by the Pol III gene.

The polynucleotides useful in this invention typically effect regulation or modulation (e.g., suppression) of gene expression during a period during the life of the treated plant of at least 1 week or longer and typically in systemic fashion. For instance, within days of treating a plant leaf with a polynucleotide composition of this invention, primary and transitive siRNAs can be detected in other leaves lateral to and above the treated leaf and in apical tissue.

Methods of making polynucleotides are well known in the art. Commercial preparation of oligonucleotides often provides 2 deoxyribonucleotides on the 3′ end of the sense strand. Long polynucleotide molecules can be synthesized from commercially available kits, e.g., kits from Ambion have DNA ligated on the 5′ end that encodes a bacterial T7 polymerase promoter that makes RNA strands that can be assembled into a dsRNA. Alternatively, dsRNA molecules can be produced from expression cassettes in bacterial cells that have regulated or deficient RNase III enzyme activity. Long polynucleotide molecules can also be assembled from multiple RNA or DNA fragments. In some embodiments design parameters such as Reynolds score and Tuschl rules are known in the art and are used in selecting polynucleotide sequences effective in gene silencing. In some embodiments random design or empirical selection of polynucleotide sequences is used in selecting polynucleotide sequences effective in gene silencing. In some embodiments the sequence of a polynucleotide is screened against the genomic DNA of the intended plant to minimize unintentional silencing of other genes.

The polynucleotide compositions of this invention are useful in compositions, such as solutions of polynucleotide molecules, at low concentrations, alone or in combination with other components (e.g., surfactants, salts, and non-polynucleotide herbicides) either in the same solution or in separately applied solutions. While there is no upper limit on the concentrations and dosages of polynucleotide molecules that can useful in the methods of this invention, lower effective concentrations and dosages will generally be sought for efficiency. The concentrations can be adjusted in consideration of the volume of spray applied to plant leaves. In one embodiment, a useful treatment for herbaceous plants using 25-mer oligonucleotide molecules is about 1 nanomole of oligonucleotide molecules per plant, e.g., from about 0.05 to 1 nanomole per plant. Other embodiments for herbaceous plants include useful ranges of about 0.05 to about 100 nanomoles, or about 0.1 to about 20 nanomoles, or about 1 nanomole to about 10 nanomoles of polynucleotides per plant. Very large plants, trees, or vines may require correspondingly larger amounts of polynucleotides. When using long dsRNA molecules that can be processed into multiple oligonucleotides, lower concentrations can be used. In the examples to below to illustrate embodiments of the invention the factor 1× when applied to oligonucleotide molecules is arbitrarily used to denote a treatment of 0.8 nanomoles of polynucleotide molecule per plant; 10×, 8 nanomoles of polynucleotide molecule per plant; and 100×, 80 nanomoles of polynucleotide molecule per plant. For example, in example 23 plants were treated with an aqueous solution comprising a 100× treatment of EPSPS dsRNA (264 micrograms or 80 nanomoles) per plant.

Single-Stranded RNA Molecules

This invention provides polynucleotide molecules for providing single-stranded RNA for systemic regulation of genes in a plant cell. More specifically, the invention also provides compositions and methods for inducing systemic regulation (e.g., systemic suppression or silencing) of a target gene in a plant by topical application to the plant of a polynucleotide molecule with a segment in a nucleotide sequence essentially identical to, or essentially complementary to, a sequence of 18 or more contiguous nucleotides in either the target gene or RNA transcribed from the target gene, whereby the composition permeates the interior of the plant and induces systemic regulation of the target gene by the action of single-stranded RNA that hybridizes to the transcribed RNA, e.g., messenger RNA. The polynucleotide molecule can be one or more polynucleotide molecules with a single such segment, multiples of such a segment, multiple different such segments, or combination thereof.

Transferring Agents, Permeability-Enhancing Agents and Treatments

The compositions and methods of this invention can comprise transferring agents or permeability-enhancing agents and treatments to condition the surface of plant tissue, e.g., leaves, stems, roots, flowers, or fruits, to permeation by the polynucleotide molecules into plant cells. The transfer of polynucleotides into plant cells can be facilitated by the prior or contemporaneous application of a polynucleotide-transferring agent to the plant tissue. In some embodiments the transferring agent is applied subsequent to the application of the polynucleotide composition. The polynucleotide transferring agent enables a pathway for polynucleotides through cuticle wax barriers, stomata and/or cell wall or membrane barriers and into plant cells. Suitable agents to facilitate transfer of the composition into a plant cell include agents that increase permeability of the exterior of the plant or that increase permeability of plant cells to oligonucleotides or polynucleotides. Such agents to facilitate transfer of the composition into a plant cell include a chemical agent, or a physical agent, or combinations thereof. Chemical agents for conditioning includes (a) surfactants, (b) an organic solvents or an aqueous solutions or aqueous mixtures of organic solvents, (c) oxidizing agents, (e) acids, (f) bases, (g) oils, (h) enzymes, or combinations thereof. Embodiments of the method can optionally include an incubation step, a neutralization step (e.g., to neutralize an acid, base, or oxidizing agent, or to inactivate an enzyme), a rinsing step, or combinations thereof. Embodiments of agents or treatments for conditioning of a plant to permeation by polynucleotides include emulsions, reverse emulsions, liposomes, and other micellar-like compositions. Embodiments of agents or treatments for conditioning of a plant to permeation by polynucleotides include counter-ions or other molecules that are known to associate with nucleic acid molecules, e.g., inorganic ammonium ions, alkyl ammonium ions, lithium ions, polyamines such as spermine, spermidine, or putrescine, and other cations. Organic solvents useful in conditioning a plant to permeation by polynucleotides include DMSO, DMF, pyridine, N-pyrrolidine, hexamethylphosphoramide, acetonitrile, dioxane, polypropylene glycol, other solvents miscible with water or that will dissolve phosphonucleotides in non-aqueous systems (such as is used in synthetic reactions). Naturally derived or synthetic oils with or without surfactants or emulsifiers can be used, e.g., plant-sourced oils, crop oils (such as those listed in the 9^thCompendium of Herbicide Adjuvants, publicly available on line at www.herbicide.adjuvants.com) can be used, e.g., paraffinic oils, polyol fatty acid esters, or oils with short-chain molecules modified with amides or polyamines such as polyethyleneimine or N-pyrrolidine.

Such agents for conditioning of a plant to permeation by polynucleotides are applied to the plant by any convenient method, e.g., spraying or coating with a powder, emulsion, suspension, or solution; similarly, the polynucleotide molecules are applied to the plant by any convenient method, e.g., spraying or wiping a solution, emulsion, or suspension.

Examples of useful surfactants include sodium or lithium salts of fatty acids (such as tallow or tallowamines or phospholipids) and organosilicone surfactants. Other useful surfactants include organosilicone surfactants including nonionic organosilicone surfactants, e.g., trisiloxane ethoxylate surfactants or a silicone polyether copolymer such as a copolymer of polyalkylene oxide modified heptamethyl trisiloxane and allyloxypolypropylene glycol methylether (commercially available as SILWET L-77® brand surfactant having CAS Number 27306-78-1 and EPA Number: CAL. REG. NO. 5905-50073-AA, currently available from Momentive Performance Materials, Albany, N.Y.). When SILWET L-77® brand surfactant is used as a pre-spray treatment of plant leaves or other surfaces, concentrations in the range of about 0.015 to about 2 percent by weight (wt %) (e.g., about 0.01, 0.015, 0.02, 0.025, 0.03, 0.035, 0.04, 0.045, 0.05, 0.055, 0.06, 0.065, 0.07, 0.075, 0.08, 0.085, 0.09, 0.095, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.5 wt %) are efficacious in preparing a leaf or other plant surface for transfer of polynucleotide molecules into plant cells from a topical application on the surface.

Useful physical agents can include (a) abrasives such as carborundum, corundum, sand, calcite, pumice, garnet, and the like, (b) nanoparticles such as carbon nanotubes or (c) a physical force. Carbon nanotubes are disclosed by Kam et al. (2004) J. Am. Chem. Soc., 126 (22):6850-6851, Liu et al. (2009) Nano Lett., 9(3):1007-1010, and Khodakovskaya et al. (2009) ACS Nano, 3(10):3221-3227. Physical force agents can include heating, chilling, the application of positive pressure, or ultrasound treatment. Embodiments of the method can optionally include an incubation step, a neutralization step (e.g., to neutralize an acid, base, or oxidizing agent, or to inactivate an enzyme), a rinsing step, or combinations thereof. The methods of the invention can further include the application of other agents which will have enhanced effect due to the silencing of certain genes. For example, when a polynucleotide is designed to regulate genes that provide herbicide resistance, the subsequent application of the herbicide can have a dramatic effect on herbicide efficacy.

Agents for laboratory conditioning of a plant to permeation by polynucleotides include, e.g., application of a chemical agent, enzymatic treatment, heating or chilling, treatment with positive or negative pressure, or ultrasound treatment. Agents for conditioning plants in a field include chemical agents such as surfactants and salts.

Target Genes and Essential Genes

Compositions and methods of the invention are useful for modulating the expression of an endogenous or transgenic target gene in a plant cell. In various embodiments, a target gene includes coding (protein-coding or translatable) sequence, non-coding (non-translatable) sequence, or both coding and non-coding sequence. Compositions of the invention can include polynucleotides and oligonucleotides designed to target multiple genes, or multiple segments of one or more genes. The target gene can include multiple consecutive segments of a target gene, multiple non-consecutive segments of a target gene, multiple alleles of a target gene, or multiple target genes from one or more species. Examples of target genes include endogenous plant genes and transgenes expressed in plant cells. Other examples of target genes include endogenous genes of plant viral pathogens or endogenous genes of invertebrate plant pests.

Target genes can include genes encoding herbicide-tolerance proteins, non-coding sequences including regulatory RNAs, and essential genes, which are genes necessary for sustaining cellular life or to support reproduction of an organism. Embodiments of essential genes include genes involved in DNA or RNA replication, gene transcription, RNA-mediated gene regulation, protein synthesis, energy production, and cell division. One example of a compendium of essential genes is described in Zhang et al. (2004) Nucleic Acids Res., 32:D271-D272, and is available at tubic.tju.edu.cn/deg/; version DEG 5.4 lists 777 essential genes for Arabidopsis thaliana. Examples of essential genes include translation initiation factor (TIF) and ribulose-1,5-bisphosphate carboxylase oxygenase (RuBisCO). Target genes can include genes encoding transcription factors and genes encoding enzymes involved in the biosynthesis or catabolism of molecules in plants such as, but not limited to, amino acids, fatty acids and other lipids, sugars and other carbohydrates, biological polymers, and secondary metabolites including alkaloids, terpenoids, polyketides, non-ribosomal peptides, and secondary metabolites of mixed biosynthetic origin.

Compositions and Methods

Single-stranded RNA molecules of this invention can be provided directly to the plant cell as RNA or provided indirectly, e.g., where a polynucleotide molecule in the treatment composition causes in cells of a plant the production of the single-stranded RNA that is capable of hybridizing to the target gene's transcript. In many embodiments compositions of polynucleotide molecules further include one or more permeability enhancing agents to facilitate transfer of the polynucleotide molecules into a plant cell, such as agents for conditioning of a plant to permeation by polynucleotides. In aspects of the invention methods include one or more applications of the polynucleotide composition and one or more applications of a permeability-enhancing agent for conditioning of a plant to permeation by polynucleotides. When the agent for conditioning to permeation is an organosilicone surfactant, embodiments of the polynucleotide molecules are double-stranded RNA oligonucleotides, single-stranded RNA oligonucleotides, double-stranded RNA polynucleotides, single-stranded RNA polynucleotides, double-stranded DNA oligonucleotides, single-stranded DNA oligonucleotides, double-stranded DNA polynucleotides, single-stranded DNA polynucleotides, chemically modified RNA or DNA oligonucleotides or polynucleotides or mixtures thereof.

An aspect of the invention provides a method for inducing systemic silencing of a target gene in a plant including (a) conditioning of a plant to permeation by polynucleotides and (b) topical application of polynucleotide molecules to the plant, where the polynucleotide molecules include at least one segment of 18 or more contiguous nucleotides cloned from or otherwise identified from the target gene in either anti-sense or sense orientation, whereby the polynucleotide molecules permeate the interior of the plant and induce systemic silencing of the target gene. The conditioning and polynucleotide application can be performed separately or in a single step. When the conditioning and polynucleotide application are performed in separate steps, the conditioning can precede or can follow the polynucleotide application within minutes, hours, or days. In some embodiments more than one conditioning step or more than one polynucleotide molecule application can be performed on the same plant. In embodiments of the method, the segment can be cloned or identified from (a) coding (i.e., protein-encoding), (b) non-coding, or (c) both coding and non-coding parts of the target gene. Non-coding parts include DNA (or the RNA encoded by the DNA) encoding RNA regulatory sequences (e.g., promoters, introns, 5′ or 3′ untranslated regions, and microRNAs, trans-acting siRNAs, natural anti-sense siRNAs, and other small RNAs with regulatory function) or encoding RNAs having structural or enzymatic function (e.g., ribozymes, ribosomal RNAs, t-RNAs, aptamers, and riboswitches).

In various embodiments of the method for inducing systemic silencing of a target gene in a plant the target gene is (a) an endogenous gene of the plant, (b) an endogenous gene of a viral pathogen of the plant, (c) an endogenous gene of an invertebrate pest of the plant, (d) an endogenous gene of a symbiont of an invertebrate pest of the plant, or (e) an man-made gene inserted into a transgenic plant. In embodiments where the target gene is endogenous to a plant, the target gene (a) is an endogenous gene of the plant that is essential for maintaining the growth or life of the plant, (b) encodes a protein that provides herbicide resistance to the plant, or (c) transcribes to an RNA regulatory molecule. In embodiments of the method for inducing systemic silencing of a target gene in a plant, the conditioning includes application of a chemical agent, abrasion, wounding, enzymatic treatment, heating or chilling, treatment with positive or negative pressure, ultrasound treatment, or combinations thereof. In some embodiments, the conditioning includes application of a surfactant, such as organosilicone surfactants, e.g., a silicone polyether copolymer such as a copolymer of polyalkylene oxide modified heptamethyl trisiloxane and allyloxypolypropylene glycol methylether (commercially available as SILWET L-77® brand surfactant). In embodiments of the method, the conditioning includes application of (a) a surfactant, (b) an organic solvent or an aqueous solution or aqueous mixture of an organic solvent, (c) a polypropylene glycol or an aqueous solution or aqueous mixture of polypropylene glycol, (d) nanoparticles, (e) an oxidizing agent, (f) an acid or a base, or (g) an oil, or of a combination thereof. Embodiments of the method can optionally include an incubation step, a neutralization step (e.g., to neutralize an acid, base, or oxidizing agent, or to inactivate an enzyme), a rinsing step, or combinations thereof.

The invention provides topical compositions for inducing systemic silencing of a target gene in a plant including (a) an agent for conditioning of a plant to permeation by polynucleotides and (b) polynucleotide molecules with at least one segment of 18 or more contiguous nucleotides essentially identical or complementary to the sequence of nucleotides of the target gene in either anti-sense or sense orientation. Such compositions can be used for the various methods disclosed herein including methods for investigating reverse genetics by modulating an endogenous gene in a plant, and as herbicidal compositions for the disclosed methods of weed control and volunteer plant control. Another aspect of the invention provides a plant including exogenous DNA or RNA for suppressing an endogenous gene, wherein the exogenous DNA is not integrated into a chromosome of the plant and the exogenous RNA is not transcribed from DNA integrated into a chromosome of the plant, and wherein the endogenous gene is suppressed by topical application of a polynucleotide to the plant. Alternatively, the exogenous DNA or RNA can be designed for suppressing an endogenous plant gene involved in responding to a pest or pathogen to provide control of plant pests or diseases. Such plant can be grown from seed or produced by a cutting, cloning, or grafting process (i.e., a plant not grown from a seed). Such plant is a row crop plant, a fruit, a vegetable, a tree, or an ornamental plant. For example, in embodiments of the inventions disclosed herein the plant is a row crop plant (e.g., corn, soybean, cotton, canola, sugar beet, alfalfa, sugarcane, rice, and wheat), or is a vegetable (e.g., tomato, sweet pepper, hot pepper, melon, watermelon, cucumber, eggplant, cauliflower, broccoli, lettuce, spinach, onion, peas, carrots, sweet corn, Chinese cabbage, leek, fennel, pumpkin, squash or gourd, radish, Brussels sprouts, tomatillo, garden beans, dry beans, or okra), or is an culinary plant (e.g., basil, parsley, coffee, or tea,), or is a fruit (e.g., apple, pear, cherry, peach, plum, apricot, banana, plantain, table grape, wine grape, citrus, avocado, mango, or berry), or is a tree grown for ornamental or commercial use (e.g., a fruit or nut tree, or is an ornamental plant (e.g., an ornamental flowering plant or shrub or turf grass). Embodiments of a plant produced by a cutting, cloning, or grafting process (i.e., a plant not grown from a seed) include fruit trees and plants including citrus, apples, avocados, tomatoes, eggplant, cucumber, melons, watermelons, and grapes as well as various ornamental plants.

Methods for Investigating Reverse Genetics

In yet another aspect, the invention provides a method for investigating reverse genetics by regulating or modulating an endogenous target gene in a plant; such method includes applying onto tissue of a growing plant a composition for providing (directly or indirectly) single-stranded RNA of this invention for systemic regulation of genes in a plant cell. In embodiments of such a method, messenger RNA encoding a protein or regulatory RNA gene is targeted by a polynucleotide of the invention, effecting modulation of the gene during a period of at least 1 week during the life of the plant, e.g., to identify traits that can be imparted by topical application of polynucleotides. The method can further include additional steps, e.g., exposing the plant to an array of compounds to identify herbicide interactions or exposing the plant to abiotic stress (e.g., water deficit stress, nutrient deficit stress, heat stress, cold stress, salinity stress) or to biotic treatments (e.g., challenge with an insect or nematode pest or with a viral, fungal, or bacterial pathogen or exposure to a chemical compound or biological treatment) to identify responses by the plant to the stress or treatment. In another aspect of the invention libraries of plants with a variety of transiently silenced genes are screened against libraries of compounds (e.g., herbicides, phytohormones, endogenous or exogenous defense elicitors such as salicylic acid or harpins, deficiencies of molecules providing a plant nutrient such as nitrogen, phosphorous, potassium, sulfur, calcium, magnesium, iron, and zinc) to identify interactions with such compounds. Examples of plants useful in such screens include Amaranthus palmeri and Nicotiana benthamiana.

Methods for Transgene Silencing

In still yet another aspect of the invention, this method can be used to silence a transgene being expressed in a plant, thus providing a negative control that is an event-independent measurement of a transgene's contribution to plant performance or effect on a trait. Imparting a negative control effect may require multiple successive treatments with the polynucleotide molecules of this invention during the life cycle of a plant.

Specific Applications

In a related aspect the compositions and methods of the invention are also useful for transiently silencing one or more genes in a growing plant cell or whole plant to effect a desired phenotype in response to culture conditions, environmental or abiotic or biotic stress, or change in market demand during the growing season or in the post-harvest environment. For example, compositions and methods of the invention are useful for transiently suppressing a biosynthetic or catabolic gene in order to produce a plant or plant product with a desired phenotype, such as a desired nutritional composition of a crop plant product, e.g., suppressing a FAD2 gene to effect a desired fatty acid profile in soybean or canola or other oilseed or suppressing a lignin biosynthetic genes such as COMT and CCOMT to provide more easily digestible forage plants. Similarly, compositions and methods of the invention are useful for transiently suppressing an RNA regulatory molecule such as a microRNA (miRNA) or an endogenous miRNA decoy such as an endogenous miRNA, miRNA precursor, or miRNA decoy as disclosed in US Patent Application Publication 2009/0070898 which is incorporated herein by reference. Embodiments of the invention are useful for suppressing an endogenous plant gene involved in responding to a pest or pathogen, thus providing control of plant pests or diseases. The polynucleotides, compositions, and delivery methods disclosed herein are further useful in suppressing an endogenous target gene of an invertebrate pest of a plant, e.g., lepidopteran or coleopteran pests which can ingest RNA from the plant, thus providing control of plant pests or pest-induced diseases, e.g., by use of a topical spray for crop plants, vegetables, or fruit trees with DNA or RNA molecules targeting an invertebrate essential gene or a gene of a symbiont of the invertebrate pest. The polynucleotides, compositions, and delivery methods disclosed herein are further useful in providing control of a viral pathogen, e.g., by use of a topical anti-viral spray for crop plants, vegetables, or fruit trees with DNA or RNA molecules targeting a viral gene.

Herbicidal Compositions and Methods

An aspect of the invention provides a liquid herbicidal composition comprising polynucleotide molecules as a plant lethal agent which provides at least one species of single-stranded RNA which can hybridize under physiological conditions in a plant cell to RNA transcribed from endogenous gene(s) in the plant cell. In some embodiments, the target gene encodes a protein that provides tolerance to an herbicide or encodes a gene essential for maintaining the growth or life of the plant. The liquid herbicidal composition can further include permeability-enhancing agents, non-nucleotide herbicides, or combinations thereof and can be used in a multi-step treatment with the non-nucleotide herbicide and/or the permeability-enhancing agents applied separately. An embodiment of the liquid herbicidal composition is a liquid including an organosilicone surfactant as permeability-enhancing agent and oligonucleotides or polynucleotides as plant lethal agent which provide to cells of the plant single-stranded RNA capable of hybridizing under physiological conditions in the plant cells to RNA transcribed from a target gene in the plant cell to effect silencing of the target gene. In one embodiment a liquid herbicidal composition effective against glyphosate-resistant plants includes an organosilicone surfactant such as SILWET L-77® brand surfactant and polynucleotide molecules for providing single-stranded RNA capable of hybridizing under physiological conditions in the plant cells to the RNA transcript of an endogenous or transgenic EPSPS gene encoding an EPSPS protein that provides tolerance to glyphosate. When the polynucleotide molecule is designed to hybridize under physiological conditions in a plant cell to mRNA encoding an endogenous, protein or non-protein coding RNA that essential for maintaining plant growth or life and to effect gene silencing and reduction of the essential protein, the polynucleotide molecule can function as a plant lethal agent, i.e., a nucleotide herbicide. These herbicidal compositions including polynucleotide molecules can be adapted for topical coating onto leaves of a growing plant or for application onto roots or cut stems, e.g., of hydroponically grown or pot-grown plants.

An aspect of the invention provides a composition adapted for topical coating onto leaves or other surfaces of a living plant including a permeability-enhancing agent, e.g., a surfactant such as an organosilicone surfactant, and oligonucleotides or polynucleotides that provide (directly or indirectly) single-stranded RNA that can hybridize under physiological conditions in a plant cell to RNA transcribed from an endogenous plant gene in the cell. In one embodiment the endogenous plant gene is an endogenous plant gene encoding a protein that provides herbicide tolerance to herbicides such as glyphosate, dicamba, or sulfonylurea. Examples of such proteins that provide herbicide tolerance are disclosed below in the section “Herbicide-Tolerance Proteins”.

Another aspect of the invention provides a method for controlling herbicide-resistant volunteer plants growing in a field of herbicide-resistant crop plants including applying onto the leaves or other surface of the volunteer plants a composition that provides to, or allows the production in, cells of the volunteer plants a single-stranded RNA molecule that is capable of hybridizing under physiological conditions in cells of the volunteer plants to RNA that is transcribed from an endogenous gene in the cells, wherein the endogenous gene (i) is an essential gene for maintaining the growth or life of the volunteer plant, (ii) encodes a protein that provides herbicide resistance to the volunteer plant, or (iii) transcribes to an RNA regulatory agent (e.g., promoters, also miRNA precursors, miRNAs, trans-acting siRNAs, and other non-coding RNAs having a regulatory function such as aptamers and riboswitches). The composition that provides to, or allows the production in, cells of the volunteer plants a single-stranded RNA molecule that is capable of hybridizing under physiological conditions in cells of the volunteer plants to RNA that is transcribed from an endogenous gene in the cells includes at least one polynucleotide molecule selected from the group consisting of (a) a single-stranded RNA molecule, (b) a single-stranded RNA molecule that self-hybridizes to form a double-stranded RNA molecule, (c) a double-stranded RNA molecule, (d) a single-stranded DNA molecule, (e) a single-stranded DNA molecule that self-hybridizes to form a double-stranded DNA molecule, and (f) a single-stranded DNA molecule including a modified Pol III gene that is transcribed to an RNA molecule, (g) a double-stranded DNA molecule, (h) a double-stranded DNA molecule including a modified Pol III gene that is transcribed to an RNA molecule, and (i) a double-stranded, hybridized RNA/DNA molecule; In embodiments for silencing or suppression of an endogenous gene of a volunteer plant that encodes a protein that provides herbicide resistance to the volunteer plant, the method can include applying onto the volunteer plant a quantity of the herbicide for which the protein provides resistance. Compositions and methods of the invention are useful in controlling herbicide-tolerant (resistant) weeds or volunteer herbicide-tolerant (resistant) transgenic plants that may be growing in crop fields, e.g., a field of herbicide-resistant crop plants such as corn, soybean, cotton, canola, sugar beet, alfalfa, sugarcane, rice, wheat, as well as fruit and vegetable crops. In some such embodiments the weed or the volunteer plant is pigweed (e.g., Palmer amaranth) and other amaranth species, mare's tail (horseweed), waterhemp, giant ragweed, common ragweed, johnsongrass, goosegrass, ryegrass, hairy crabgrass, prickly lettuce, velvetleaf, alfalfa, corn, soybean, canola, cotton, sugar beet, sugarcane, rice, or wheat. In some such embodiments the endogenous gene encodes a protein that provides herbicide tolerance; examples of such proteins are disclosed herein in the section “Herbicide-Tolerance Proteins”. In other such embodiments single-stranded RNA selectively suppresses a gene in a specific plant species but not in others, to permit selective control of that plant species. In still other such embodiments a non-selective, single-stranded RNA molecule suppresses a common gene in multiple plant species, permitting broader control across a group or taxon of plants. In more specific embodiments the method further includes applying onto the weed or volunteer plant a quantity of non-nucleotide herbicide (e.g., glyphosate, dicamba, glufosinate or sulfonylurea) for which the protein targeted by an RNA molecule provides resistance allowing dual modes of action through reducing production of the target protein by action of the RNA molecule and inhibiting the function of protein that is produced by action of the non-nucleotide herbicide; the herbicide can be applied in a separate (earlier or later) step from, or together with, the nucleotide composition. Applying a polynucleotide composition concurrently with, or followed by, application of a conventional non-nucleotide herbicide in some cases provides weed or volunteer plant control with synergistic effect (i.e., where the combined effect is greater than the sum of effects of the treatments made separately).

Herbicide-Tolerance Proteins

Natural (non-transgenic) and transgenic plants exhibiting herbicide tolerance (resistance) often have a gene that encodes a protein that is responsible for the herbicide tolerance, e.g., a transgene that provides the tolerance, a mutated endogenous gene that provides the tolerance or multiple copies of an endogenous gene that is normally targeted by an herbicide. A strategy for control of such plants is to apply an agent that suppresses, or at least reduces the expression of, the gene encoding the protein that imparts herbicide tolerance. Examples of a protein that provides tolerance to an herbicide include e.g., a 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS), a glyphosate oxidoreductase (GOX), a glyphosate decarboxylase, a glyphosate-N-acetyl transferase (GAT), a dicamba monooxygenase, a phosphinothricin acetyltransferase, a 2,2-dichloropropionic acid dehalogenase, an acetohydroxyacid synthase, an acetolactate synthase, a haloarylnitrilase, an acetyl-coenzyme A carboxylase, a dihydropteroate synthase, a phytoene desaturase, a protoporphyrin IX oxygenase, a hydroxyphenylpyruvate dioxygenase, a para-aminobenzoate synthase, a glutamine synthase, a cellulose synthase, a beta-tubulin, and a serine hydroxymethyltransferase.

Examples of nucleic acids encoding proteins conferring tolerance to herbicides include 5-enolpyruvylshikimate-3-phosphate synthases (EPSPS; see, e.g., U.S. Pat. Nos. 5,627,061, 5,633,435 RE39,247, 6,040,497, and 5,094,945, and PCT International Application Publications WO04074443 and WO04009761), glyphosate oxidoreductase (GOX; U.S. Pat. No. 5,463,175), glyphosate decarboxylase (PCT International Application Publication WO05003362, U.S. Pat. No. 7,405,347, and U.S. Patent Application Publication 2004/0177399), glyphosate-N-acetyl transferase (GAT; U.S. Pat. No. 7,714,188) conferring tolerance to glyphosate; dicamba monooxygenase conferring tolerance to auxin-like herbicides such as dicamba (U.S. Pat. No. 7,105,724); phosphinothricin acetyltransferase (pat or bar) conferring tolerance to phosphinothricin or glufosinate (U.S. Pat. No. 5,646,024); 2,2-dichloropropionic acid dehalogenase conferring tolerance to 2,2-dichloropropionic acid (Dalapon) (PCT International Application Publication WO9927116); acetohydroxyacid synthase or acetolactate synthase conferring tolerance to acetolactate synthase inhibitors such as sulfonylurea, imidazolinone, triazolopyrimidine, pyrimidyloxybenzoates and phthalide (U.S. Pat. No. 6,225,105); haloarylnitrilase (Bxn) for conferring tolerance to bromoxynil (U.S. Pat. No. 4,810,648); modified acetyl-coenzyme A carboxylase for conferring tolerance to cyclohexanedione (sethoxydim) and aryloxyphenoxypropionate (haloxyfop) (U.S. Pat. No. 6,414,222); dihydropteroate synthase (sul I) for conferring tolerance to sulfonamide herbicides (U.S. Pat. No. 5,719,046); 32 kDa photosystem II polypeptide (psbA) for conferring tolerance to triazine herbicides (Hirschberg et al., 1983, Science, 222:1346-1349); anthranilate synthase for conferring tolerance to 5-methyltryptophan (U.S. Pat. No. 4,581,847); dihydrodipicolinic acid synthase (dap A) for conferring to tolerance to aminoethyl cysteine (PCT International Application Publication WO8911789); phytoene desaturase (crtI) for conferring tolerance to pyridazinone herbicides such as norflurazon (Japan Patent JP06343473); hydroxyphenylpyruvate dioxygenase, a 4-hydroxyphenylacetic acid oxidase and a 4-hydroxyphenylacetic 1-hydrolase (U.S. Pat. No. 7,304,209) for conferring tolerance to cyclopropylisoxazole herbicides such as isoxaflutole (U.S. Pat. No. 6,268,549); modified protoporphyrinogen oxidase I (protox) for conferring tolerance to protoporphyrinogen oxidase inhibitors (U.S. Pat. No. 5,939,602); aryloxyalkanoate dioxygenase (AAD-1) for conferring tolerance to an herbicide containing an aryloxyalkanoate moiety (WO05107437); a serine hydroxymethyltransferase (US Patent Application Publication 2008/0155716), a glufosinate-tolerant glutamine synthase (US Patent Application Publication 2009/0018016). Examples of such herbicides include phenoxy auxins (such as 2,4-D and dichlorprop), pyridyloxy auxins (such as fluroxypyr and triclopyr), aryloxyphenoxypropionates (AOPP) acetyl-coenzyme A carboxylase (ACCase) inhibitors (such as haloxyfop, quizalofop, and diclofop), and 5-substituted phenoxyacetate protoporphyrinogen oxidase IX inhibitors (such as pyraflufen and flumiclorac). The nucleotide sequences of the nucleic acids encoding herbicide-tolerance proteins and the sequences of the herbicide-tolerance proteins, as disclosed in the U.S. patent and patent application publications cited in this paragraph are incorporated herein by reference.

Aspects of this invention provide polynucleotides and methods that directly or indirectly provide to a plant cell RNAs that hybridize to RNA encoding such herbicide-tolerance proteins at a level to be lethal to the plant or at least at a level to reduce herbicide tolerance. Due to the sequence degeneracy of the DNA encoding herbicide-tolerance proteins it is possible to design a polynucleotide for use in this invention that is specifically effective in a particular plant. Due to conservation of domains of DNA among a multitude of plants it is possible to design a polynucleotide for use in this invention that is effective across a variety of plants.

In an embodiment the polynucleotide is admixed with the corresponding herbicide to potentiate the activity of the herbicide by providing improved herbicidal activity. In an embodiment the polynucleotide is utilized separately from the herbicide but in combination with an application of the herbicide as a pre- or post-treatment. In embodiments the organosilicone surfactant is advantageously combined with the herbicide and the polynucleotide or is combined with one or the other when the compositions are applied in a sequential manner. Plants in a greenhouse setting can be treated using a track sprayer or laboratory sprayer with a 11001XR spray nozzle to deliver the sample solution at a determined rate (e.g., 140 L/ha) at 0.25 MPa pressure. In the field the treatment solution can be applied with a CO₂pressurized backpack sprayer calibrated to deliver the appropriate rate of the composition with a 11015 flat fan spray nozzle with a customized single nozzle assembly (to minimize waste) at a spray pressure of 0.25 MPa; the single nozzle sprayer provides an effective spray swath of 60 cm above the canopy of 3 to 12 inch tall growing plants.

Example 1

This example illustrates the utility of the polynucleotide molecules of this invention in controlling herbicide resistant weeds. Genotypes of glyphosate-resistant Palmer amaranth were identified as having multiple copies, e.g., from 4 to more than 100 copies, of the gene encoding 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) which is targeted by the glyphosate compounds in herbicide treatments.

With reference to SEQ ID NO:1 as shown in FIG. 1, four oligonucleotide-size “short” dsRNA molecules were designed with an anti-sense strand that is capable of hybridizing to the mRNA transcribed from the Palmer amaranth EPSPS gene at positions 14-38 (short dsRNA-1), positions 153-177 (short dsRNA-2), 345-369 (short dsRNA-3), and 1105-1129 (short dsRNA-4), as indicated by underlined nucleotides in FIG. 1. The four designed short dsRNAs were purchased from Integrated DNA Technologies (IDT); the dsRNAs had a two nucleotide overhang at the 3′ end of the anti-sense strand, and had two deoxynucleotides as the terminal nucleotides at the 3′ end of the sense strand.

With reference to SEQ ID NO:1 and FIG. 1, three “long” double-stranded RNA polynucleotides were designed with one strand that is capable of hybridizing to the mRNA transcribed from the Palmer amaranth EPSPS gene at positions 16-170 (long dsRNA-1), 451-722 (long dsRNA-2), and 1109-1328 (long dsRNA-3) as indicted by the bolded nucleotides in FIG. 1. The three designed long dsRNAs were made using an Ambion MEGAscript® RNAi Kit, Cat. No. 1626.

Vegetative clones of glyphosate-resistant Palmer amaranth with 16 copies of the endogenous gene encoding EPSPS (Gaines, et al. (2010) Proceedings of the National Academy of Sciences 107(3): 1029-1034) were grown in 3.5 inch square pots with SunGro® Redi-earth seedling mix containing 3.5 kg/cubic meter Osmocote® 14-14-14 fertilizer in a greenhouse with 14-hour photoperiod and a daytime temperature of 30 degrees centigrade and night temperature of 20 degrees centigrade; the plants were watered with deionized water as necessary.

A pretreatment surfactant solution for leaf dip was prepared by diluting SILWET L-77® brand organosilicone surfactant with distilled water to 0.1% (v/v). A pretreatment 5% (w/v) carborundum solution was prepared by mixing 2 g carborundum (400 grit) in 40 ml distilled water. A treatment buffer solution was prepared with 10 mM sodium phosphate and 0.01% (v/v) SILWET L-77® brand organosilicone surfactant in DEPC water (Omega Bio-Tek) and adjusted to pH 6.8. A short dsRNA solution was prepared with equimolar amounts of each of the four short dsRNAs (identified above) in treatment buffer solution at a concentration of 0.005 nanomoles of each short dsRNA per microliter. A long dsRNA solution was prepared with equimolar amounts of each of the three long dsRNAs in treatment buffer at a concentration of 0.0006 nanomoles of each of long dsRNA per microliter. A mixed (short/long) dsRNA solution was prepared with 0.005 nanomoles of each of the four short dsRNAs and 0.0006 nanomoles of each of the three long dsRNAs per microliter.

Vegetative clones of glyphosate-resistant Palmer amaranth with 16 copies of the endogenous gene encoding EPSPS were pre-treated with carborundum solution or surfactant solution to condition the leaves to transfer or permeation of dsRNA. For carborundum solution pre-treatment leaf abrasion was effected by gently rubbing 0.5 ml of the carborundum solution on the upper surface of a leaf, rinsing with water and blotting dry. For surfactant solution pre-treatment four, fully-expanded, mature source leaves were dipped in the surfactant solution and allowed to dry. After leaf pre-treatment by carborundum solution or surfactant solution, the conditioned leaves were treated with either buffer solution (as a control) or 40 microliters of a dsRNA solution (applying 10 microliters of dsRNA solution on each of 4 leaves per plant). Treatment with the short dsRNA solution applied about 0.8 nanomoles of short dsRNA molecules (0.2 nanomoles of each short dsRNA) to each treated plant. Treatment with the long dsRNA solution applied about 0.072 nanomoles of long dsRNA molecules (0.024 nanomoles of each long dsRNA) to each treated plant. Treatment with the mixed (short/long) dsRNA solution applied about 0.8 nanomoles of the short dsRNA molecules and about 0.072 nanomoles of the long dsRNA molecules to each treated plant. Except for controls, all plants were sprayed with a glyphosate herbicide solution (1682 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide) immediately, 48, or 72 hours after dsRNA treatment and evaluated at least after 7 days post-glyphosate treatment.

Results:

Six surfactant-treated, control plants (no dsRNA molecule treatment) survived glyphosate treatment. See FIG. 3A for a picture of the plants 7 days after the glyphosate treatment.

Two of four carborundum abrasive-treated, control plants (no dsRNA molecule treatment) were killed by glyphosate treatment.

Six surfactant-treated plants that were treated with glyphosate immediately after application of the mixed (short/long) dsRNA solution survived but were stunted.

Six surfactant-treated plants that were treated only with the mixed (short/long) dsRNA solution and no glyphosate survived. Five of six surfactant-treated plants that were treated with the mixed (short/long) dsRNA solutions followed by glyphosate treatment were killed.

Five of six surfactant-treated plants that were treated with glyphosate 48 hours after application of the mixed (short/long) dsRNA solution were killed.

Three of four carborundum-treated plants that were treated with glyphosate 48 hours after application of the mixed (short/long) dsRNA solution were killed.

Five of six surfactant-treated plants, that were treated with the long dsRNA solution, followed by glyphosate treatment after 72 hours, were killed; see FIG. 3B. Six of six surfactant-treated plants, that were treated with the short dsRNA solution, followed by glyphosate treatment after 72 hours, were killed; see FIG. 3C.

Example 2

This example illustrates the utility of the polynucleotide molecules of this invention for improving the control of glyphosate herbicide-sensitive weeds. The mixed (short/long) dsRNA solutions prepared in Example 1 were applied to glyphosate-sensitive velvetleaf plants (a total of 40 microliters applied to two leaves) that had been pre-treated with the surfactant solution used in Example 1. Control plants were treated with buffer only following pre-treatment with the surfactant solution. 48 hours after dsRNA treatment the plants were treated with glyphosate herbicide solution (53 g acid equivalent per hectare of Roundup® WeatherMAX® brand glyphosate herbicide). A two-fold increase in glyphosate activity as estimated by observing plant growth (measured as plant height) was observed in the plants treated with the polynucleotide composition and herbicide as compared to control plants treated with buffer and herbicide. The plants treated with the polynucleotide composition and herbicide survived with severe stunting; the control plants treated with buffer and herbicide survived and fully recovered. Similar results were obtained with other glyphosate herbicide-sensitive weeds, i.e., glyphosate herbicide-sensitive waterhemp, redroot pigweed, giant ragweed, prickly lettuce, tobacco, and dandelion.

Example 3

This example illustrates the utility of the polynucleotide molecules of this invention for controlling weeds in transgenic glyphosate-resistant crops. Transgenic alfalfa, canola, corn, cotton, rice, soybean, sugarcane, sugar beet, and wheat plants having recombinant DNA for expressing a bacterial EPSPS (see U.S. Pat. RE39,247 for a description of glyphosate-resistant “class II” EPSPS genes) are treated with (a) the surfactant solution used in Example 1, (b) the mixed (short/long) dsRNA solution prepared in Example 1, and (c) glyphosate herbicide solution (1682 g acid equivalence per hectare Roundup® WeatherMAX®) 48 hours after dsRNA treatment. After 30 days all transgenic glyphosate-resistant crop plants survive and exhibit no stunting.

Example 4

This example illustrates the utility of the polynucleotide molecules of the invention as herbicidal agents. Two dsRNA polynucleotide molecules were designed to target overlapping segments of mRNA encoding phytoene desaturase in tobacco (Nicotiana benthamiana). With reference to SEQ ID NO:2 and FIG. 5, a dsRNA targeting a 192 nt length (shown in bold in FIG. 5) and a 685 nt length (shown in underline in FIG. 5) of the mRNA were made using an Ambion® MEGAscript® kit. Separate dsRNA solutions were prepared. Tobacco plant leaves were pretreated with surfactant solution prepared as in Example 1 and then treated with either one of the dsRNA solutions applying about 0.6 micromoles of dsRNA per plant. On day 9 after dsRNA treatment phytoene desaturase silencing was apparent from visible leaf bleaching on apical leaves; see FIG. 4. At 15 days after treatment with dsRNA one half of the treated plants appeared to be dead and the other half of the plants had most of the above ground tissues bleached. Northern blot analysis indicates the presence of siRNAs corresponding to the dsRNAs used in treatment.

Example 5

This example further illustrates the utility of polynucleotide molecules of the invention as herbicidal agents. dsRNA oligonucleotide molecules are designed to target RNA encoding EPSPS for each of the following plants: ragweed (Ambrosia artemisiifolia), giant ragweed (Ambrosia trifida), Johnsongrass (Sorghum halepense), hairy fleabane (Conzya bonariensis), sourgrass (Digitaria insularis), liverseedgrass (Urochloa panicoides), euphorbia (Euphorbia heterophylla), junglerice (Echinochloa colona), lambsquarters (Chenopodium album), green foxtail (Setaria viridis), foxtail millet (Setaria italic), barnyard grass (Echinochloa crus-galli), crabgrass (Digitaria sanguinalis), cocklebur (Xanthium strumarium), blackgrass (Alopecurus myosuroides), wild oat (Avena fatua), sicklepod (Senna obtusifolia), morning glories (Ipomoea sp.), field bindweed (Convolvulus arvensis), shattercane (Sorghum bicolor), dayflower (Commelina), Spiderwort (Tradescantia sp.), ryegrass (Lolium sp.), goosegrass (Eleusine indica), horseweed (Conzya canadensis), buckhorn plantain (Plantago lanceolata), pigweed (Amaranthus palmeri), rough-fruit amaranth (Amaranthus tuberculatus), tumble pigweed (Amaranthus albus), smooth pigweed (Amaranthus hybridus), redroot pigweed (Amaranthus retroflexus), waterhemp (Amaranthus rudis/tuberculatus), slender amaranth (Amaranthus viridis), Thunberg's amaranth (Amaranthus thumbergii), spiny amaranth (Amaranthus spinosis), (Amaranthus rubra), (Amaranthus lividus), Mediterranean amaranth (Amaranthus graecizans), rough amaranth (Amaranthus chlorostachys), Powell amaranth (Amaranthus powellii), Mat amaranth (Amaranthus blitoides), Kochia (Kochia scoparia), Yellow starthistle (Centaurea solstitialis), and Velvetleaf (Abutilon theophrasti). Plant leaves are pretreated with surfactant solution prepared as in Example 1 and treated with dsRNA solutions at a treatment of about 1 nanomole per plant. After 15 days treated plants are dead, dying, or stunted.

Example 6

This example further illustrates the utility of polynucleotide molecules of the invention as herbicidal agents. dsRNA oligonucleotide molecules are designed to target RNA encoding acetolactate synthase and phytoene desaturase for each of the plants listed in Example 5. Plant leaves are pretreated with surfactant solution prepared as in Example 1 and treated with dsRNA solutions at a treatment of about 1 nanomole per plant. After 15 days treated plants are dead, dying, or stunted.

Example 7

This example further illustrates the utility of the polynucleotide molecules of the invention as herbicidal agents. The method of Example 4 is repeated to provide short dsRNA oligonucleotides that are designed to target RNA encoding each of the following proteins in Palmer amaranth: a 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS), an acetyl-coenzyme A carboxylase, a dihydropteroate synthase, a protoporphyrin IX oxygenase, a hydroxyphenylpyruvate dioxygenase, a glutamine synthase, D1 protein, a translation initiation factor (TIF), a ribulose-1,5-bisphosphate carboxylase oxygenase (RuBisCO), and a DNA-dependent ATPase (ddATPase). Leaves of separate glyphosate-resistant Palmer amaranth plants are treated with the surfactant solution prepared as in Example 1 and separately each of the dsRNA oligonucleotide molecules in the manner of Example 1 at a treatment of 1 nanomole of dsRNA per plant. After 30 days the treated plants are dead, dying, or stunted.

Example 8

This example illustrates the utility of employing a synthetic Pol III gene in compositions and methods of this invention. With reference to SEQ ID NO:3 and FIG. 2, a synthetic Pol III gene is created using elements from an Arabidopsis thaliana U6 snRNA gene to provide a dsDNA molecule with two copies of RGCCCR elements (bold and underlined), an upstream sequence element (USE) having the sequence “TCCCACATCG” (SEQ ID NO:4, bold and underlined), a TATA box (bold and underlined), a “G” nucleotide (bold and underlined), anti-sense DNA (italics) corresponding to a bacterial DNA encoding an EPSPS protein (see U.S. Pat. RE39,247) that imparts resistance to glyphosate herbicide when expressed in transgenic corn plants, an “AAGATTAGCACGG” element (SEQ ID NO:5, bold and underlined) embedded in the anti-sense DNA, an “ACGCATAAAAT” element (SEQ ID NO:6, bold and underlined) followed by sense DNA (lower case) and a “TTTTTT” terminator element (SEQ ID NO:7, bold and underlined). A solution of 0.1 wt % SILWET L-77® brand organosilicone surfactant and a solution of multiple copies of the dsDNA molecule are sprayed onto leaves of volunteer glyphosate-resistant corn plants growing in a field of glyphosate-resistant soybean plants, followed 7 days later by treatment with Roundup WeatherMAX® brand glyphosate herbicide. 15 days later the corn plants are dead and the soybean plants are thriving; control glyphosate-resistant corn plants treated only with surfactant and glyphosate herbicide are thriving.

Example 9

This example illustrates an aspect of the invention. In this example, polynucleotide molecules were applied to and permeated into plant tissue thereby inducing systemic regulation, i.e., silencing, of a target gene (an endogenous EPSPS). More specifically, a composition including single-stranded DNA (ssDNA) oligonucleotides suppressed the expression of an endogenous EPSPS in glyphosate-tolerant Palmer amaranth (Amaranthus palmeri).

The anti-sense ssDNA oligonucleotides were designed using IDT SciTools software (available at idtdna.com/Scitools/Applications/Anti-sense/Anti-sense.aspx). The oligonucleotides included four ssDNA oligonucleotides anti-sense to Amaranthus palmeri EPSPS (SEQ ID NOs:8, 9, 10, and 11), two chemically modified (phosphorothioate modified) ssDNA oligonucleotides anti-sense to Amaranthus palmeri EPSPS (SEQ ID NOs:12 and 13), a control ssDNA oligonucleotide anti-sense to a control gene, barley (Hordeum vulgare) seed protein, GenBank ID X97636 (SEQ ID NO:14), and a chemically modified (5′-labelled with Alexa Fluor 488 from Invitrogen) ssDNA oligonucleotide anti-sense to Amaranthus palmeri EPSPS (SEQ ID NO:15), as indicated in Table 1.

TABLE 1

Anti-sense ssDNA oligonucleotides

SEQ ID
Sequence

Name
NO:
(5′ to 3′)
Note

Anti-sense_PO1
8
ACCCTCCACGACTGCCCTTT

Anti-sense_PO2
9
GTTTCCTTCACTCTCCAGC

Anti-sense_PO3
10
GTAGCTTGAGCCATTATTGT

Anti-sense_PO4
11
GTTGATGGTAGTAGCTTGAG

Anti-sense_PS1
12
ACCCTCCACGACTGCCCTTT
phosphorothioate

modification of the

three 5′-terminal and

three 3′-terminal

nucleotides

Anti-sense_PS2
13
GTTTCCTTCACTCTCCAGC
phosphorothioate

modification of the three

5′-terminal and three 3′-

terminal nucleotides

Anti-sense_ck
14
AAGCGGTTGAGCACTGAA
Control sequence, barley

seed protein, GenBank

ID X97636

Anti-
15
ACCCTCCACGACTGCCCTTT
5′-labelled with Alexa

sense_PO1_488

Fluor 488

Oligonucleotide uptake was demonstrated with the fluorescently labelled ssDNA oligonucleotides (SEQ ID NO:15) confirming that ssDNA oligonucleotides permeated the leaf tissue. Petioles of detached leaves of glyphosate-resistant Palmer amaranth were placed in 200 mM sucrose solution with fluorescently labelled ssDNA oligonucleotides (SEQ ID NO:15). Leaf images were taken by Bio-Rad PharosFX imager equipped with a 488 nm laser from 4 h up to 48 h after uptake through petiole. Leaves incubated with 200 mM sucrose alone served as control. A slightly time-dependent vascular uptake of the fluorescently labelled ssDNA oligonucleotides was observed (see FIG. 6). Fluorescently labelled ssDNA oligonucleotides were released from vascular tissue into cells as early as 8 h after treatment and were observed to accumulate at the leaf edge at 24 h and 48 h, suggesting a transpiration effect.

EPSPS suppression was demonstrated with detached leaves of glyphosate-resistant Palmer amaranth using the petiole uptake technique. Petioles of detached leaves of glyphosate-resistant Palmer amaranth were placed in 200 mM sucrose solution with oligonucleotides according to the treatments listed in Table 2. Control leaves were permeated with the anti-sense control (SEQ ID NO:14), and additionally treated with or without 50 micrograms/mL glyphosate. EPSPS mRNA, EPSPS protein, and shikimate levels were measured after 48 h incubation. To assess the effects of anti-sense ssDNA oligonucleotides on EPSPS mRNA, total leaf RNA was isolated and quantitative real-time RT-PCR was performed to compare EPSPS mRNA levels. To assess the effects of anti-sense ssDNA oligonucleotides on EPSPS protein, total leaf soluble protein was isolated, separated by SDS-PAGE, and EPSPS protein levels measured by Western blot using antibodies against maize EPSPS TIPA. Effects of anti-sense ssDNA oligonucleotides on shikimate accumulation as an indication of suppression of EPSPS were assessed in two experiments: in experiment 1, the oligonucleotide-treated leaves were incubated with 50 microgram/mL glyphosate for an additional 48 h either by petiole uptake (control leaves were permeated with the anti-sense control (SEQ ID NO:14), and additionally treated with or without 50 micrograms/mL glyphosate); in experiment 2, leaf disc assays were performed on the oligonucleotide-treated leaves, and shikimate levels measured by HPLC (controls in this case were leaves that had not been treated with oligonucleotides but incubated with 50 microgram/mL glyphosate).

TABLE 2

List of treatments using anti-sense ssDNA oligonucleotides

Final

Treatment
Anti-sense ssDNAs
concentration

#1
Anti-sense_PO1 (SEQ ID NO: 8)
5 microM

#2
Anti-sense_PO2 (SEQ ID NO: 9)
5 microM

#3
Anti-sense_PS1 (SEQ ID NO: 12)
5 microM

#4
Anti-sense_PS2 (SEQ ID NO: 13)
5 microM

#5
Anti-sense_PS1, PS2
10 microM each

(SEQ ID NOs: 12, 13)
(20 microM total)

#6
Anti-sense_PO1, PO2, PO3, PO4
5 microM each

(SEQ ID NOs: 8, 9, 10, 11)
(20 microM total)

Control
Anti-sense_ck (SEQ ID NO: 14)
5 microM or 20 microM

Results for EPSPS mRNA expression, EPSPS protein levels, and shikimate levels are shown in FIGS. 7, 8, and 9, respectively. These results demonstrate that treatment with the anti-sense ssDNA oligonucleotides systematically regulated or suppressed the target gene by decreasing levels of the target gene transcript (EPSPS mRNA) or of the protein (EPSPS) encoded by the target gene in the plant tissue. In this particular experiment, treatments #1 and #6 appeared to be more efficacious in suppressing levels of EPSPS mRNA and protein and in increasing glyphosate efficacy as evidenced by the increased accumulation of shikimate. These results also indicate that glyphosate efficacy is improved by suppressing EPSPS mRNA and protein in glyphosate-resistant Palmer amaranth.

Example 10

This example illustrates an aspect of the invention. In this example, growing plants were treated with a topically applied composition for inducing systemic silencing of a target gene in a plant including (a) an agent for conditioning of a plant to permeation by polynucleotides and (b) polynucleotides including at least one polynucleotide strand including at least one segment of 18 or more contiguous nucleotides of the target gene in either anti-sense or sense orientation. More specifically, tobacco (Nicotiana benthamiana) plants were treated with (a) a topically applied surfactant solution for conditioning of the plant to permeation by polynucleotides and (b) a composition including topically applied DNA oligonucleotides or polynucleotides having at least one strand including at least one segment of 18 or more contiguous nucleotides of the target gene in either anti-sense or sense orientation, whereby systemic regulation or suppression of the target gene (a phytoene desaturase, “PDS”) was achieved.

The target gene used was a Nicotiana benthamiana phytoene desaturase (SEQ ID NO:2), shown in FIG. 10; the segment consisting of nucleotides 421-1120 of SEQ ID NO:2 (underlined text in FIG. 10) was used to design a 700-mer dsRNA polynucleotide (“PDS 700-mer”) and the segment consisting of nucleotides 914-1113 of SEQ ID NO:2 (bolded underlined text in FIG. 10) was used to design a 200-mer dsRNA polynucleotide (“PDS 200-mer”). Sequences of other polynucleotides or oligonucleotides used in the treatments are listed in Table 3. FIG. 11 schematically depicts the location of the sequences of these oligonucleotides and polynucleotides in relation to the phytoene synthase (SEQ ID NO:2) sequence. Non-plant sequences obtained from corn rootworm (“CRW”), SEQ ID NOs:27, 28, 29, and 30 were used as non-homologous controls. Some of the polynucleotides included a T7 promoter sequence (indicated by lower-case text in Table 3) that is a promoter recognized by a bacteriophage T7 RNA polymerase.

TABLE 3

sense/

SEQ

anti-

Number of
ID

Description
sense
sequence
nucleotides
NO:

oligo 1 with
S
taatacgactcactataggGCAAGAGATGTCCTAGGTGGG
40
16

T7 promoter

oligo 2 with
S
taatacgactcactataggACAGATTTCTTCAGGAGAAACAT
44
17

T7 promoter

GG

oligo 1 w/o T7
S
GCAAGAGATGTCCTAGGTGGG
21
18

promoter

oligo 2 w/o T7
S
ACAGATTTCTTCAGGAGAAACATGG
25
19

promoter

oligo 3 mix
AS
taatacgactcactataggCATCTCCTTTAATTGTACTGCC
41
20, 21

with T7

(SEQ ID NO: 20)
(SEQ ID NO: 20),

promoter

and

taatacgactcactataggTTTAATTGTACTGCCATTATTC
41

(SEQ ID NO: 21)
(SEQ ID NO: 21)

oligo 3 mix
AS
CATCTCCTTTAATTGTACTGCC
22
22, 23

w/o T7

(SEQ ID NO: 22)
(SEQ ID NO: 22),

promoter

and

TTTAATTGTACTGCCATTATTC
22

(SEQ ID NO: 23)
(SEQ ID NO: 23)

oligo 4 w/o T7
AS
CACTTCCATCCTCATTCAGCTCGAT
25
24

promoter

oligo 5 w/o T7
AS
ACACCTCATCTGTCACCCTATCAG
24
25

promoter

oligo 6 w/o T7
AS
CAGTCTCGTACCAATCTCCATCAT
24
26

promoter

CRW oligo
S and
taatacgactcactatagggATCCATGATATCGTGAACATC
41
27, 28

mixture with
AS
(SEQ ID NO: 27)
(SEQ ID NO: 27),

T7 promoter

and

taatacgactcactatagggGCAAAGAAAAATGCGTCG
38

(SEQ ID NO: 28)
(SEQ ID NO: 28)

CRW oligo
S and
ATCCATGATATCGTGAACATC
21
29, 30

mixture w/o
AS
(SEQ ID NO: 29)
(SEQ ID NO: 29),

T7 promoter

and

GCAAAGAAAAATGCGTCG
18

(SEQ ID NO: 29)
(SEQ ID NO: 30)

The following procedure was used for all assays described in this example. Four-week old Nicotiana benthamiana plants were used in all assays. Plants were treated with 0.1% SILWET L-77® brand surfactant solution freshly made with ddH2O. Two fully expanded leaves per plant (one cotyledon, one true leaf) were dipped into the SILWET L-77® brand surfactant solution for a few seconds, and allowed to dry for 15-30 minutes before application of the polynucleotide composition. Final concentration for each oligonucleotide or polynucleotide was 25 microM (in 0.01% SILWET L-77® brand surfactant, 5 mM sodium phosphate buffer, pH 6.8) unless otherwise stated. 20 microliters of the solution was applied to the top surface of each of the two pre-treated leaves to provide a total of 40 microliters (1 nmol oligonucleotide or polynucleotide) for each plant. Leaf bleaching was observed 3 days post treatment.

FIG. 12A illustrates results of an assay where a 200-mer dsRNA polynucleotide with an RNA sequence corresponding to the “PDS 200-mer” segment (nucleotides 914-1113 of SEQ ID NO:2) and a combination of single-stranded DNA oligonucleotides and polynucleotides (SEQ ID NOs:16, 17, 20, 21, 24, 25, and 26) were separately applied to tobacco plants. The 200-mer dsRNA polynucleotide was applied at a concentration of 0.6 microM. Bleaching of apical leaves was observed after topical treatment with the polynucleotides and oligonucleotides, indicating systemic regulation or suppression of the target phytoene desaturase gene.

FIG. 12B illustrates results of northern blot analysis of RNA isolated from Nicotiana benthamiana plants treated with buffer (control), the 200-mer dsRNA polynucleotide, and the ssDNA oligonucleotides. Also shown is RNA isolated from plants that had been stressed by being kept at 4 degrees Celsius and in the dark overnight prior to treatment with the 200-mer dsRNA polynucleotides.

FIG. 13 illustrates phenotypes observed at day 12 after treatment in another assay of the effect from twelve combinations of polynucleotides or oligonucleotides (see Table 4). Table 4 also lists observations of visible bleaching of the plants at day 5 after treatment and the results of chlorophyll measurements taken at days 7 and 12 after treatment. Chlorophyll measurements are an indication of suppression of the target gene phytoene desaturase, and measurements were taken at 6 spots on the apical area, focussing on visibly bleached leaves or (in plants without visible bleaching) on leaves in equivalent locations on the plants; lower chlorophyll measurement values indicate suppression of phytoene desaturase. These results show that the combinations of oligonucleotides and polynucleotides in treatments 2, 3, 4, 8, and 11 were effective in systematically regulating (suppressing) the target gene in the treated plants; treatment 1 also effected systematic regulation (suppression) of the target gene to a lesser extent. The 200-mer dsRNA polynucleotide was also effective in systematically regulating (suppressing) the target gene in the treated plants. Oligonucleotides from a non-homologous (corn rootworm) gene (treatments 5 and 6) did not suppress the target phytoene desaturase gene. These results demonstrate that both sense and anti-sense single-stranded DNA oligonucleotides and polynucleotides were effective in systematically regulating (suppressing) the target gene in the treated plants. In this particular example, sense oligonucleotides with the T7 promoter (treatment 1) effected a weak systematic suppression of the phytoene desaturase gene, whereas sense oligonucleotides without the T7 promoter (treatment 7) did not suppress the phytoene desaturase gene. In this particular example, anti-sense oligonucleotides with the T7 promoter (treatment 2) as well as anti-sense oligonucleotides without the T7 promoter (treatment 8) both provided strong bleaching, indicating strong systemic regulation of the target phytoene desaturase gene.

TABLE 4

Bleaching
Chlorophyll
Chlorophyll

Treatment
Description
SEQ ID NO:
Comment
(day 5)
(day 7)
(day 12)

1
Oligos 1 and 2
16, 17
Sense oligos
weak
18.6
17.5

with T7

promoter

2
Oligo 3
20, 21
Anti-sense
strong
12.7
1.6

oligos with T7

promoter

3
Oligos 1, 2, and
16, 17, 20, 21
Sense and
strong
11.5
2.6

3

anti-sense

oligos with T7

promoter

4
Oligos 1, 2, 3, 4,
16, 17, 20,
Sense and
strong
15.1
2.5

5 and 6
21, 24, 25, 26
anti-sense

oligos with T7

promoter, plus

anti-sense

oligos without

T7 promoter

5
CRW oligo
27, 28
Sense and
not yet
30.8
37.3

mixture with T7

anti-sense

promoter

oligos with T7

promoter

6
CRW oligo
29, 30
Sense and
not yet
34.2
38.2

mixture without

anti-sense

T7 promoter

oligos without

T7 promoter

7
Oligos 1 and 2
18, 19
Sense oligos
not yet
32.0
41.1

without T7

without T7

promoter

promoter

8
Oligo 3 without
22, 23
Anti-sense
strong
11.3
3.2

T7 promoter

oligos without

T7 promoter

9
Oligos 1, 2, and
18, 19, 22,
Sense and
not yet
30.2
34.4

3 w/o T7
23, 24, 25, 26
anti-sense

promoter and

oligos without

oligos 4, 5, & 6

T7 promoter

10
200-mer dsRNA
RNA
Sense and
strong
11.3
4.0

polynucleotide
sequence
anti-sense

corresponding
dsRNA

to the “PDS
polynucleotide

200-mer”

segment

consisting of

nucleotides

914-1113 of

SEQ ID

NO:2

11
1/10^thof
16, 17, 20,
Sense and
strong
11.4
4.5

Experiment 4
21, 24, 25, 26
anti-sense

oligonucleotide

oligos with T7

mixture

promoter, plus

anti-sense

oligos without

T7 promoter

12
1/100^thof
16, 17, 20,
Sense and
not yet
31.0
38.0

Experiment 4
21, 24, 25, 26
anti-sense

oligonucleotide

oligos with T7

mixture

promoter, plus

anti-sense

oligos without

T7 promoter

13
Control
(none)
Buffer only
not yet
31.2
38.4

Table 5 shows six polynucleotides: a 40-mer segment (“PDS 40-mer sense ssDNA”, SEQ ID NO:31) consisting of the 5′-most 40 nucleotides of the “PDS 700-mer” (nucleotides 1081-1120 of SEQ ID NO:2), and four anti-sense single-stranded DNA polynucleotides and one sense single-stranded DNA polynucleotide synthesized based on the “PDS 40-mer sense ssDNA” sequence (SEQ ID NO:31). FIG. 14 illustrates results of topical treatment of tobacco plants with the polynucleotides and oligonucleotides. Strong bleaching of apical leaves indicating systemic regulation or suppression of the target gene phytoene desaturase was observed after topical treatment with the PDS 21-mer anti-sense ssDNA and PDS 33-mer anti-sense ssDNA, as well as after topical treatment with the PCR-amplified and column-purified 700-mer dsRNA polynucleotide (“PDS 700-mer dsRNA”), previously assayed PDS anti-sense 22-mer oligonucleotides with a T7 promoter (SEQ ID NOs:20 and 21) (“PDS T7 anti-sense”), or previously assayed PDS anti-sense 22-mer oligonucleotides without a T7 promoter (SEQ ID NOs:22 and 23) (“PDS anti-sense”). Little or no visible bleaching of apical leaves was observed after topical treatment with the buffer only (“Buffer”), or after topical treatment with heat-denatured (5 minutes at 95 degrees Celsius, then stored on ice) 700-mer dsRNA polynucleotide (“PDS 700-mer dsRNA heated”), the PDS 15-mer anti-sense ssDNA, or the PDS 18-mer anti-sense ssDNA.

TABLE 5

SEQ

ID

Description
Sequence
NO:

PDS 40-mer sense ssDNA
TGTTTTATACTGAATAATGGCAGTACAATTAAAGGAGATG
31

PDS 15-mer anti-sense ssDNA
CATCTCCTTTAATTG
32

PDS 18-mer anti-sense ssDNA
CATCTCCTTTAATTGTAC
33

PDS 21-mer anti-sense ssDNA
CATCTCCTTTAATTGTACTGC
34

PDS 33-mer anti-sense ssDNA
CATCTCCTTTAATTGTACTGCCATTATTCAGTA
35

PDS 21-mer sense ssDNA
GCAGTACAATTAAAGGAGATG
36

Results of another assay are shown in FIG. 15, strong bleaching of apical leaves indicating systemic regulation or suppression of the target gene phytoene desaturase was observed after topical treatment with the PDS 21-mer anti-sense ssDNA (SEQ ID NO:34, “21nt PDS anti-sense”) or with previously assayed PDS anti-sense 22-mer oligonucleotides without a T7 promoter (SEQ ID NOs:22 and 23) (“PDS anti-sense”). Little or no visible bleaching of apical leaves was observed after topical treatment with the buffer only (“control: buffer”), or after topical treatment with PDS 21-mer sense ssDNA (SEQ ID NO:36, “21nt PDS sense”).

Example 11

This example illustrates treatment of growing plants with a topically applied composition for inducing systemic silencing of a target gene in a plant including (a) an agent for conditioning of a plant to permeation by polynucleotides and (b) polynucleotides including at least one polynucleotide strand including at least one segment of 18 or more contiguous nucleotides of the target gene in either anti-sense or sense orientation. More specifically, this example demonstrates the target specificity (sequence specificity) of the polynucleotides.

Palmer amaranth phytoene desaturase (PDS) has the sequence TCAATTTCATCTATTGGAAGTGATTTTTTGGGTCATTCTGTGAGAAATTTCAGTGTTAGTAAAGTTTATG GAGCAAAGCAAAGAAATGGGCACTGCCCTTTAAAGGTTGTTTGTATAGATTATCCTAGGCCAGAGCTT GAAAGTACATCCAATTTCTTGGAAGCCGCCTACTTATCTTCTACTTTTCGGAATTCGCCTCGTCCTCAG AAGCCATTAGAAGTTGTAATTGCTGGAGCAGGTTTGGCTGGTCTATCCACGGCAAAGTATTTAGCTGA TGCAGGTCACAAACCCATATTGTTGGAAGCACGAGATGTTTTAGGAGGAAAGGTTGCAGCGTGGAAG GATGAGGATGGTGACTGGTATGAGACTGGGCTACATATATTCTTTGGGGCATATCCAAATGTCCAAAA TCTATTTGGAGAACTTGGTATAAATGACCGACTGCAATGGAAGGAGCACTCTATGATTTTTGCAATGC CCAGCAAGCCCGGTGAATTCAGTCGCTTTGATTTTCCCGAAATCCTGCCTGCACCATTAAATGGCATAT GGGCAATCCTAAGAAATAATGAAATGCTAACCTGGCCAGAAAAAATCAAGTTTGCCATTGGCTTGTTG CCTGCTATGGCAGGCGGACAGTCATATGTTGAAGCACAAGATGGTTTGAGTGTCCAAGAGTGGATGAG AAAACAAGGAGTACCCGATCGTGTAACTGATGATGTGTTTATTGCCATGTCAAAGGCACTGAACTTCA TAAATCCCGATGAACTTTCAATGCAGTGCATCTTGATTGCTCTGAACCGATTCCTGCAGGAGAAACATGG TTCTAAGATGGCCTTCCTAGACGGAAACCCTCCAGAGAGGCTGTGCATGCCTATTGTTAAACACATCGAGTCA CTAGGTGGTGAAGTTAAACTTAACTCTCGTATACAAAAGATTCAGTTGGACCAGAGTGGAAGCGTGAAGAGTT TTTTGCTAAATAACGGGAGGGAAATACGAGGAGATGCCTATGTTTTTGCCACCCCAGTTGACATCTTGAA GCTGTTACTACCTGATACTTGGAAGGAAATCTCATACTTCAAAAAACTTGAGAAATTAGTGGGCGTTC CTGTGATTAATGTTCACATATGGTTTGACAGAAAATTAAAGAATACATATGACCATCTACTCTTCAGCA GGAGTCCTCTTTTGAGTGTCTATGCTGATATGTCGGAGACATGCAAGGAATATAAGGATCCAAATAGA TCCATGCTGGAATTGGTTTTTGCACCCGCGGAGGAATGGATTTCACGAAGCGACACTGATATTATAGA GGCAACAATGAAAGAGCTTGCCAAGCTTTTCCCGGATGAAATCGCTGCCGATGGAAGCAAGGCCAAG ATCCTCAAATATCATGTCGTCAAAACTCCAAGGTCGGTTTATAAGACTGTACCGGATTGTGAACCTTGT CGGCCGCTGCAAAGATCACCAATAGAGGGTTTCTATTTAGCTGGTGATTACACAAAACAAAAATATTT GGCTTCTATGGAAGGTGCTGTCTTATCTGGGAAGCTTTGTGCACAGGCTATCGTACAGGATTATGATCT GCTGAGTTCTCGAGCACAAAGAGAATTGGCG (SEQ ID NO:37). A 678 base pair dsRNA polynucleotide with an anti-sense strand capable of hybridizing to the RNA encoded by the nucleotides at positions 317-994 (shown as underlined text) in SEQ ID NO:37 and a 198 base pair dsRNA polynucleotide with an anti-sense strand capable of hybridizing to the RNA encoded by the nucleotides at positions 797-994 (shown as italicized and underlined text) in SEQ ID NO:37 were synthesized.

Nicotiana benthamiana phytoene desaturase has the sequence ATGCCCCAAATCGGACTTGTATCTGCTGTTAATTTGAGAGTCCAAGGTAATTCAGCTTATCTTTGGAGC TCGAGGTCTTCGTTGGGAACTGAAAGTCAAGATGTTTGCTTGCAAAGGAATTTGTTATGTTTTGGTAGT AGCGACTCCATGGGGCATAAGTTAAGGATTCGTACTCCAAGTGCCACGACCCGAAGATTGACAAAGG ACTTTAATCCTTTAAAGGTAGTCTGCATTGATTATCCAAGACCAGAGCTAGACAATACAGTTAACTATT TGGAGGCGGCGTTATTATCATCATCGTTTCGTACTTCCTCACGCCCAACTAAACCATTGGAGATTGTTA TTGCTGGTGCAGGTTTGGGTGGTTTGTCTACAGCAAAATATCTGGCAGATGCTGGTCACAAACCGATA TTGCTGGAGGCAAGAGATGTCCTAGGTGGGAAGGTAGCTGCATGGAAAGATGATGATGGAGATTGGT ACGAGACTGGGTTGCACATATTCTTTGGGGCTTACCCAAATATGCAGAACCTGTTTGGAGAACTAGGG ATTGATGATCGGTTGCAGTGGAAGGAACATTCAATGATATTTGCGATGCCTAACAAGCCAGGGGAGTT CAGCCGCTTTGATTTTCCTGAAGCTCTTCCTGCGCCATTAAATGGAATTTTGGCCATACTAAAGAACAA CGAAATGCTTACGTGGCCCGAGAAAGTCAAATTTGCTATTGGACTCTTGCCAGCAATGCTTGGAGGGC AATCTTATGTTGAAGCTCAAGACGGTTTAAGTGTTAAGGACTGGATGAGAAAGCAAGGTGTGCCTGAT AGGGTGACAGATGAGGTGTTCATTGCCATGTCAAAGGCACTTAACTTCATAAACCCTGACGAGCTTTC GATGCAGTGCATTTTGATTGCTTTGAACAGATTTCTTCAGGAGAAACATGGTTCAAAAATGGCCTTTTTAGAT GGTAACCCTCCTGAGAGACTTTGCATGCCGATTGTGGAACATATTGAGTCAAAAGGTGGCCAAGTCAGACTAA ACTCACGAATAAAAAAGATCGAGCTGAATGAGGATGGAAGTGTCAAATGTTTTATACTGAATAATGGCAGTACA ATTAAAGGAGATGCTTTTGTGTTTGCCACTCCAGTGGATATCTTGAAGCTTCTTTTGCCTGAAGACTGG AAAGAGATCCCATATTTCCAAAAGTTGGAGAAGCTAGTGGGAGTTCCTGTGATAAATGTCCATATATG GTTTGACAGAAAACTGAAGAACACATCTGATAATCTGCTCTTCAGCAGAAGCCCGTTGCTCAGTGTGT ACGCTGACATGTCTGTTACATGTAAGGAATATTACAACCCCAATCAGTCTATGTTGGAATTGGTATTTG CACCCGCAGAAGAGTGGATAAATCGTAGTGACTCAGAAATTATTGATGCTACAATGAAGGAACTAGC GAAGCTTTTCCCTGATGAAATTTCGGCAGATCAGAGCAAAGCAAAAATATTGAAGTATCATGTTGTCA AAACCCCAAGGTCTGTTTATAAAACTGTGCCAGGTTGTGAACCCTGTCGGCCCTTGCAAAGATCCCCT ATAGAGGGTTTTTATTTAGCTGGTGACTACACGAAACAGAAGTACTTGGCTTCAATGGAAGGTGCTGT CTTATCAGGAAAGCTTTGTGCACAAGCTATTGTACAGGATTACGAGTTACTTCTTGGCCGGAGCCAGA AGATGTTGGCAGAAGCAAGCGTAGTTAGCATAGTGAACTAA (SEQ ID NO:38). A 685 base pair dsRNA polynucleotide with an anti-sense strand capable of hybridizing to the RNA encoded by the nucleotides at positions 421-1105 (shown as underlined text) in SEQ ID NO:38 and a 192 base pair dsRNA polynucleotide with an anti-sense strand capable of hybridizing to the RNA encoded by the nucleotides at positions 914-1105 (shown as italicized and underlined text) in SEQ ID NO:38 were synthesized.

An alignment of the Palmer amaranth and Nicotiana benthamiana PDS DNA sequences was performed using a global pairwise alignment (stretcher) and is illustrated in FIG. 16; with this method the two sequences showed about 71% identity (1252/1762).

Palmer amaranth plants having 16 copies of EPSPS and 5-8 inches high were treated with 0.1% SILWET L-77® brand surfactant solution freshly made with ddH2O. Four fully expanded leaves per plant were dipped into the SILWET L-77® brand surfactant solution for a few seconds, and allowed to dry for 30 minutes to 1 hour before application of the polynucleotide composition. Individual polynucleotide solutions were made for each of the 678 bp Palmer PDS dsRNA, 198 bp Palmer PDS dsRNA, the 685 bp Nicotiana benthamiana PDS dsRNA, and the 192 bp Nicotiana benthamiana PDS dsRNA (0.6 micromolar polynucleotide in 0.01% SILWET L-77® brand surfactant, 5 mM sodium phosphate buffer, pH 6.8). 10 microliters of polynucleotide solution (or buffer as a control) was applied to the top surface of each of the four pre-treated leaves per plant to provide a total of 40 microliters for each plant. Plants were kept in a growth chamber, and leaf bleaching was observed 3 days post treatment. Plants topically treated with either 678 bp Palmer PDS dsRNA or 198 bp Palmer PDS dsRNA, showed bleaching of leaves (indicating silencing of the endogenous phytoene desaturase) but Palmer amaranth plants topically treated with either 685 by Nicotiana benthamiana PDS dsRNA or 192 bp Nicotiana benthamiana PDS dsRNA did not show bleaching of leaves. This sequence specificity demonstrates that the polynucleotide compositions and methods of the invention are useful in selective control of a given species or taxon having a specific target gene sequence, e.g., in controlling herbicide-resistant volunteer plants growing in a field of crop plants resistant to the same herbicide.

In a separate assay, Palmer amaranth plants topically treated with 678 bp Palmer PDS dsRNA (labelled “700 nt dsRNA PDS”) or 198 bp Palmer PDS dsRNA (labelled “200 nt dsRNA PDS”) showed bleaching of leaves (indicating silencing of the endogenous phytoene desaturase) but Palmer amaranth plants topically treated with a 260 base pair dsRNA of an invertebrate gene (labelled “260 nt dsRNA DV49”, from corn root worm Diabrotica virgifera) did not result in a bleaching phenotype, indicating no silencing of the endogenous phytoene desaturase (FIG. 17). This sequence specificity demonstrates that the polynucleotide compositions and methods of the invention are useful in selective control of a given species or taxon.

Example 12

This example describes use of a topically applied composition including at least one polynucleotide strand including at least one segment of 18 or more contiguous nucleotides of a target gene in either anti-sense or sense orientation to induce systemic silencing of a target gene in a plant. More specifically this example demonstrates using a single treatment with a phytoene desaturase (PDS) oligonucleotide to induce systemic silencing in different plant organs including leaves, stems, and flowers.

Four-week old tobacco (Nicotiana benthamiana) plants were used in all treatments. Two fully expanded leaves (one cotyledon, one true leaf) were conditioned by dipping into freshly made surfactant solution (0.1% SILWET L-77® brand surfactant in double-distilled water) for a few seconds and allowed to dry for 15-30 minutes. Twenty microliters of a single-stranded DNA (ssDNA) 22-mer oligonucleotide with the sequence GGCAGTACAATTAAAGGAGATG (SEQ ID NO:39), corresponding to the nucleotides at positions 1099-1120 of Nicotiana benthamiana phytoene desaturase (SEQ ID NO:2) was applied as a 25 micromolar solution in 0.01% SILWET L-77® brand surfactant in 5 millimolar sodium phosphate buffer, pH 6.8 to the top surface of each conditioned leaf for a total of 40 microliters (1 nanomole oligonucleotide) per plant. Control plants were treated with the SILWET® brand surfactant solution without the DNA oligonucleotide. Plants were observed for bleaching 3 days post-treatment. Apical leaves, stems, and flowers of plants treated with the ssDNA oligonucleotide all displayed bleaching indicating systemic silencing of PDS (FIG. 18A).

Flowers of both control and ssDNA-treated plants were allowed to set seed. Seeds were collected from mature fruits, weighed, and allowed to germinate. Seed weights were identical (about 11 mg per 100 seeds) and seed morphology appeared similar between the ssDNA-treated and the control plants. A reduced amount of seed produced per fruit and a reduction in germination rate (4 out of 100 seeds germinated) was observed in seeds from the ssDNA-treated plants, compared to the amount of seed per fruit and germination rate (95 out of 100 seeds germinated) of seeds from control plants.

In a separate assay using a similar procedure, tobacco plants were conditioned by dipping in 0.1% SILWET L-77® brand surfactant in double-distilled water, allowed to dry for 15-30 minutes, and treated with the PDS ssDNA 22-mer (SEQ ID NO:39) applied as a 25 micromolar solution in 0.01% SILWET L-77® brand surfactant in 5 millimolar sodium phosphate buffer, pH 6.8 to the top surface of each conditioned leaf for a total of 40 microliters (1 nanomole oligonucleotide) per plant. Other plants were not conditioned with a surfactant treatment, but were treated only with 1 nanomole of the PDS ssDNA 22-mer (SEQ ID NO:39) applied either by infiltration with a needleless syringe (shown in FIG. 18B) or by hand application of drops to the leaf surface (not shown in FIG. 18B), and either as a 25 micromolar solution in 0.01% SILWET L-77® brand surfactant in 5 millimolar sodium phosphate buffer, pH 6.8 or as a 25 micromolar solution in 5 millimolar sodium phosphate buffer, pH 6.8 (without surfactant). Negative control plants were treated with the SILWET® brand surfactant buffer solution without the DNA oligonucleotide. Results are depicted in FIG. 18B. All plants treated only with direct application of the PDS ssDNA (without conditioning by SILWET L-77® brand surfactant treatment), whether applied by infiltration or by hand application of drops, displayed bleaching of apical leaves, stems, and flowers, indicating systemic silencing of PDS.

Example 13

This example illustrates methods and topically applied compositions for inducing systemic silencing including the use of agents for conditioning of a plant to permeation by polynucleotides. More specifically, this example describes use of polynucleotides of the invention to control herbicide-resistant Palmer amaranth.

Palmer amaranth plants having lower (fewer than 30) copy numbers of 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) are susceptible to treatment with dsRNA designed to silence EPSPS followed by treatment with glyphosate (see details in Example 1). However, Palmer amaranth plants having high copy numbers of EPSPS (i.e., 30 or more copies of EPSPS) are resistant to glyphosate treatment and are a challenge for weed resistance management. For example, in one assay (results not shown) on glyphosate resistant high-copy Palmer amaranth using treatments similar to those described in Example 1 but where either dose of dsRNA was increased up to ten-fold (i.e., 8 nanomoles of short dsRNAs described in Example 1 per plant) or where a proprietary glyphosate formulation (“Roundup® WeatherMAX® brand herbicide”) combined with a tallowamine surfactant was used, glyphosate activity was improved (estimated by observing plant growth measured as plant height) but the resistant plants were not killed.

Three different glyphosate resistant high-copy Palmer amaranth lines (3 plants per replicate) were treated with dsRNA using the treatment conditions listed in Table 6, where the dsRNA delivery vehicle, permeabilization or conditioning agent, and order of steps were varied. Results are depicted in FIG. 19. Treatment with “4×” glyphosate (i.e., treatment with 3360 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide which is four-fold the standard rate of application of 840 g acid equivalent per hectare) alone did not kill 35-copy (experiment 3) or 57-copy (experiment 6) Palmer amaranth.

In one set of experiments (1-3, Table 6), including 2% ammonium sulfate in an aqueous dsRNA delivery vehicle comprising 0.1% tallowamine surfactant and 10% glycerol (experiment 2) improved the efficacy of a 10-fold dose of dsRNA followed by a 4× glyphosate application. Improved efficacy of a 10-fold dose of dsRNA followed by glyphosate application was also observed when ammonium sulfate was included in a dsRNA delivery vehicle without a tallowamine surfactant (experiment 8).

In another set of experiments (4-6, Table 6), applying the SILWET L-77® brand surfactant prior to applying the dsRNA in a delivery vehicle containing ammonium sulfate was effective, whereas combining the SILWET L-77® brand surfactant with the dsRNA in the dsRNA delivery vehicle containing ammonium sulfate was not effective. Applying glyphosate (“Roundup® WeatherMAX® brand herbicide”) at 72 hours (experiment 7) was less effective than applying glyphosate at 48 hours (experiment 2) after treatment with dsRNA.

TABLE 6

Step 1

EPSPS

Palmer
EPSPS

dsRNA

amaranth
Copy
Experiment
relative
dsRNA delivery

line
number
number
concentration
vehicle
Step 2
Step 3*

R31
35
1
10×
0.1% tallowamine
1% SILWET
4x WeatherMAX ®

surfactant + 10%
L-77 ®
(48 h)

glycerol
brand surfactant

2
10×
2% ammonium
1% SILWET
4x WeatherMAX ®

sulfate + 0.1%
L-77 ®
(48 h)

tallowamine
brand surfactant

surfactant + 10%

glycerol

3
Buffer only
2% ammonium
1% SILWET
4x WeatherMAX ®

(control)
sulfate + 0.1%
L-77 ®
(48 h)

tallowamine
brand surfactant

surfactant + 10%

glycerol

Step 2

Palmer
EPSPS

EPSPS dsRNA
dsRNA

amaranth
Copy
Experiment

relative
delivery

line
number
number
Step 1
concentration
vehicle
Step 3*

R34
57
4
—
10×
1% SILWET
4x WeatherMAX ®

L-77 ®
(48 h)

brand surfactant +

2% ammonium

sulfate

5
1% SILWET
10×
2% ammonium
4x WeatherMAX ®

L-77 ®

sulfate
(48 h)

brand

surfactant

6
1% SILWET
Buffer only
2% ammonium
4x WeatherMAX ®

L-77 ®
(control)
sulfate
(48 h)

brand

surfactant

Step 1

EPSPS

Palmer
EPSPS

dsRNA

amaranth
Copy
Experiment
relative
dsRNA delivery

line
number
number
concentration
vehicle
Step 2
Step 3*

R28
87
7
10×
2% ammonium
1% SILWET
4x WeatherMAX ®

sulfate + 0.1%
L-77 ®
(72 h)

tallowamine
brand surfactant

surfactant + 10%

glycerol

Step 2

Palmer
EPSPS

EPSPS dsRNA
dsRNA

amaranth
Copy
Experiment

relative
delivery

line
number
number
Step 1
concentration
vehicle
Step 3*

R28
87
8
1% SILWET
10×
2% ammonium
4x WeatherMAX ®

L-77 ®

sulfate
(72 h)

brand

surfactant

9
1% SILWET
Buffer only
2% ammonium
4x WeatherMAX ®

L-77 ®
(control)
sulfate
(72 h)

brand

surfactant

*glyphosate (as the commercial formulation “Roundup ® WeatherMAX ® brand herbicide”, which contains 660 g/L glyphosate K+ salt in a carrier including the MON56151 tallowamine surfactant blend of tallowamine (16-18C) and cocoamine (12-14C) in the ratio of 55:45) is listed at the amount used (where 1× = 840 g acid equivalent per hectare of Roundup ® WeatherMAX ® brand herbicide, 4× = 3360 g acid equivalent per hectare of Roundup ® WeatherMAX ® brand herbicide) and hours after application of dsRNA

Example 14

This example illustrates methods and topically applied compositions for inducing systemic silencing including the use of agents for conditioning of a plant to permeation by polynucleotides.

Two small RNAs identified through small RNA sequencing were found to be abundant in and unique to Palmer amaranth plants that had been treated with four oligonucleotide-size “short” EPSPS dsRNA molecules as described in Example 1. These two small RNAs were respectively mapped to nucleotide positions 743-764 and 566-585 of the full-length EPSPS having the sequence shown in FIG. 20 (SEQ ID NO:40). Two 25 nucleotide long oligonucleotide-size “short” dsRNA molecules were designed with an anti-sense strand that is capable of hybridizing to the mRNA transcribed from the Palmer amaranth EPSPS gene at nucleotide positions 743-767 (“short dsRNA-5”) and 564-588 (“short dsRNA-6”), as indicated by the italicized underlined nucleotides in SEQ ID NO:40 shown in FIG. 20, which also shows the four oligonucleotide-size “short” EPSPS dsRNA molecules (underlined, non-italicized text) and the three “long” double-stranded RNA polynucleotides (bolded text as described in Example 1.

Application of a mixture of the four oligonucleotide-size “short” EPSPS dsRNA molecules (described in Example 1) followed by application of glyphosate replicating the treatment procedure described in Example 1 resulted in 4 out of 4 Palmer amaranth plants with 16 copies of EPSPS being killed. Using the same treatment procedure but applying short dsRNA-5 and short dsRNA-6 together resulted in 0 out of 4 Palmer amaranth plants being killed. Adding either or both short dsRNA-5 and short dsRNA-6 to the mixture of the four oligonucleotide-size “short” EPSPS dsRNA molecules (described in Example 1) resulted in 4 out of 4 Palmer amaranth plants being killed, i.e., no antagonistic effect of short dsRNA-5 and short dsRNA-6 was observed.

Example 15

Salicylic acid (SA) induces virus resistance in tobacco; see, e.g., Chivasa et al. (1997) Plant Cell, 19:547-557. Glyphosate-resistant Palmer amaranth plants having 49 or 63 copies EPSPS were pretreated with 15 millimolar SA. A solution of the four oligonucleotide-size “short” EPSPS dsRNA molecules (described in Example 1) was applied by hand at 1, 5, or 24 hours after treatment with SA, followed 72 hours later by spraying with glyphosate (1682 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide). No improvement of the effects of the dsRNAs and glyphosate activity (estimated by observing plant growth measured as plant height) was observed for any of the SA treatments at 7 days after glyphosate treatment.

Example 16

This example illustrates methods and topically applied compositions for inducing systemic silencing including the use of agents for conditioning of a plant to permeation by polynucleotides. More specifically, this example describes variations in the order and timing of application of polynucleotides and surfactant solution.

These assays were conducted on Palmer amaranth plants with high copy numbers (56, 63, or 100 copies) of EPSPS, using a protocol including the following steps: (1) application of dsRNA (a solution of the four oligonucleotide-size “short” EPSPS dsRNA molecules described in Example 1) in a solution containing tallowamine surfactant and glycerol; (2) application of 1% SILWET L-77® brand silicone surfactant; and (3) application of glyphosate (1682 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide). Spacing of the timing of the application of the polynucleotides and application of SILWET® brand surfactant was assessed, with the SILWET® brand surfactant spray applied at 30 minutes, 1 hour, or 2 hours after application of the dsRNA solution. In this set of assays, the three different times of the SILWET® brand surfactant solution application all produced similar results, i.e., stunting of growth of most of the high copy plants that were treated with the dsRNA solution, as compared to control high copy plants which were treated with a control solution containing only tallowamine surfactant and glycerol.

Example 17

This example illustrates methods and topically applied compositions for inducing systemic silencing including the use of agents for conditioning of a plant to permeation by polynucleotides. More specifically, this example describes application of polynucleotides of the invention by low-volume spray and the use of a silicone surfactant and ammonium sulfate.

A solution of dsRNA (a solution of the four oligonucleotide-size “short” EPSPS dsRNA molecules described in Example 1) in a solution containing 2% ammonium sulfate was applied by low-volume spray to Palmer amaranth having 16 copies of EPSPS, followed by spraying with glyphosate (1682 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide), resulting in the Palmer amaranth plants being killed.

Six Palmer amaranth plants per treatment were treated with a three-step procedure using low-volume spray: (1) spraying 1% SILWET L-77® brand surfactant; (2) spraying 2 milliliters of a dsRNA solution containing equal amounts of the four oligonucleotide-size “short” EPSPS dsRNA molecules described in Example 1 at one of 3 doses (1× or 0.8 nanomoles per plant, 2× or 1.6 nanomoles per plant, or 4× or 3.2 nanomoles per plant); and (3) spraying glyphosate (1682 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide) at a rate of 159 liters/acre. Nine days after the glyphosate spray, all six plants sprayed with 4×(3.2 nanomoles per plant) dsRNA were killed, and the plants sprayed with 2×(1.6 nanomoles per plant) dsRNA or 1× (0.8 nanomoles per plant) dsRNA were stunted (FIG. 21A).

Several assays were carried out on glyphosate-resistant Palmer amaranth grown from field-collected seeds. Plants were treated with various protocols described below, with some plants being treated topically with a dsRNA solution and control plants being treated with the buffer (dsRNA vehicle); application was by low-volume spray. Unless otherwise noted, the dsRNA solution contained equal amounts of the four oligonucleotide-size “short” EPSPS dsRNA molecules described in Example 1 in buffer at a “4×” dose (3.2 nanomoles per plant); the buffer consisted of 10 millimolar sodium phosphate and 0.01% (v/v) SILWET L-77® brand organosilicone surfactant in diethylpyrocarbonate (DEPC) water (Omega Bio-Tek) and adjusted to pH 6.8; and herbicide was a glyphosate herbicide applied at 840 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide at a rate of 159 liters/acre. Results are provided in Table 7.

Assays 1 and 2: These assays were carried out on glyphosate-resistant Palmer amaranth grown from seeds obtained from a soil sample from a farm location with known glyphosate-resistant Palmer amaranth stands. For assay 1, ten plants per treatment were treated as follows: (1) spraying 1% SILWET L-77® brand surfactant; (2) spraying 2 milliliters of the dsRNA solution; and (3) spraying glyphosate. For assay 2, eighteen plants per treatment were treated using the same procedure as in assay 1.

Assay 3: This assay compared treatments applied at different developmental stages and used seedlings grown from Palmer amaranth seeds from a Macon County, Ga. site and selected for glyphosate resistance. The buffer included 2% ammonium sulfate. Twelve small (3-leaf stage) or twelve large (5-leaf stage) seedlings per treatment were treated as follows: (1) spraying 1% SILWET L-77® brand surfactant; (2) spraying 2 milliliters of the dsRNA solution; and (3) spraying glyphosate. This treatment provided better control (killed more plants) on small seedlings as compared to the larger seedlings. The dsRNA treatment killed or stunted more glyphosate-resistant plants than treatment with buffer and herbicide achieved, although at 16 days after treatment not all dsRNA-treated plants were killed.

Assays 4 and 5: These assays used Palmer amaranth plants grown from seeds in soil from a Pemiscot, Mo. farm. The buffer included 2% ammonium sulfate. Eleven small (3-leaf stage) seedlings per treatment were treated as follows: (1) spraying 1% SILWET L-77® brand surfactant; (2) spraying 2 milliliters of the dsRNA solution; and (3) spraying glyphosate. For assay 5, twelve plants per treatment were treated using the same procedure as in assay 4.

Assay 6: This assay used Palmer amaranth plants grown from seeds in soil from the “Ivy2” farm. The buffer included 2% ammonium sulfate. Eighteen small (3-leaf stage) seedlings per treatment were treated as follows: (1) spraying 1% SILWET L-77® brand surfactant; (2) applying 2 milliliters of the dsRNA solution, either by hand or by spraying; and (3) spraying glyphosate. In this assay the method of application (hand drop or spraying) provided similar results.

Assay 7: This assay used 3- to 4-leaf stage Palmer amaranth seedlings grown from F3 seeds selected for glyphosate resistance and more resistant to glyphosate than plants in assays 1-6. The buffer included 2% ammonium sulfate. Eighteen plants per treatment were treated as follows: (1) spraying 1% SILWET L-77® brand surfactant; (2) spraying 2 milliliters of the dsRNA solution; and (3) spraying glyphosate.

TABLE 7

killed plants/total plants

Assay
dsRNA-

Number
treated
control
Comments

1
2/10
0/10
dsRNA-treated survivors stunted

compared to controls (FIG. 21B)

2
7/18
4/18
dsRNA-treated survivors stunted

at 8 and 30 days after treatment,

compared to controls

3 (large
5/12
3/12
dsRNA/ammonium sulfate-treated

seedlings)

survivors more stunted after

3 (small
9/12
6/12
treatment, compared to controls

seedlings)

4
7/11
2/11
dsRNA/ammonium sulfate-treated

5
8/12
3/12
survivors more stunted after

treatment, compared to controls

6 (hand
14/18
—

drop)

6 (spray)
13/18
9/18

7
8/18
2/18

Example 18

This example illustrates methods and topically applied compositions for inducing systemic silencing including the use of agents for conditioning of a plant to permeation by polynucleotides.

In these assays, the dsRNA solution contained equal amounts of the four oligonucleotide-size “short” EPSPS dsRNA molecules described in Example 1 at a “10×” dose (8 nanomoles per plant) in a solution containing either 0.2% tallowamine surfactant and 2% ammonium sulfate (identified in FIG. 22 as “tallowamine/AMS”), or one of the following transfection reagents: (a) a polyamine (JetPRIME™, Polyplus-transfection SA, Illkirch, France), (b) a magnetic nanoparticle (SilenceMag, OZ Biosciences, Marseille, France), (c) a peptide (N-TER™ Nanoparticle, Sigma-Aldrich, St. Louis, Mo.), (d) a lipid (siPORT™ NeoFX™, Ambion, Foster City, Calif.), or (e) a cationic lipid/polymer (TransIT®, Minis Bio, Madison, Wis.). Plants were treated as follows: (1) hand-applying dsRNA solution; (2) spraying 1% SILWET L-77® brand surfactant; and (3) spraying with glyphosate applied at 840 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide at a rate of 159 liters/acre. This protocol when used with dsRNA in the tallowamine surfactant/ammonium sulfate solution kills glyphosate-resistant Palmer amaranth having 35 copies EPSPS. Results are depicted in FIG. 22. Stunting or death of the plants was observed for plants treated with dsRNA in solutions containing polyamine (JetPRIME™), peptide (N-TER™ Nanoparticle), cationic lipid/polymer (TransIT®), or tallowamine surfactant/ammonium sulfate.

Example 19

This example illustrates methods using compositions including topically applied polynucleotides for inducing systemic silencing in a plant. More specifically, this example describes use of different types of polynucleotides for inducing systemic silencing.

Sense single-stranded DNAs (ssDNAs) and anti-sense single-stranded RNAs (ssRNAs) corresponding to the Palmer amaranth EPSPS gene at positions 14-38, positions 153-177, 345-369, and 1105-1129 (indicated by underlined nucleotides in FIG. 1) were purchased from Integrated DNA Technologies. The sense ssDNAs and anti-sense ssRNAs were annealed by heating equal moles of mixed ssDNAs and ssRNAs at 95 degrees Celsius for 5 minutes and slowly cooled over 1.5-2 hours to room temperature to yield the DNA/RNA hybrids.

16-copy glyphosate-resistant Palmer amaranth plants were used in the assays which used this procedure: (1) spraying 1% SILWET L-77® brand surfactant; (2) hand-applying on four mature leaves of each plant a total of 0.8 nanomoles of either the Palmer EPSPS dsRNAs (as described in Example 1) or of the Palmer EPSPS DNA/RNA hybrids; and (3) spraying with glyphosate applied at 840 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide at a rate of 159 liters/acre.

Results are depicted in FIG. 23. Seven days after the herbicide spraying, 4 out of 6 dsRNA-treated plants were dead and the remaining 2 were dying, whereas plants sprayed with the DNA/RNA hybrid were stunted in growth (glyphosate injury) compared to the control.

Example 20

Six glyphosate-resistant Palmer amaranth plants having 16 copies of EPSPS were used per treatment in this assay. A 0.8 nanomoles (“1×”) per plant treatment of dsRNA, a ten-fold greater amount (8 nanomoles per plant treatment, “10×”) of ssDNA polynucleotides (described in Example 19) and buffer alone as a control, were applied to separate plants by hand in buffer containing 2% ammonium sulfate, followed 48 hours later by spraying with glyphosate applied at 840 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide at a rate of 159 liters/acre. FIG. 24 depicts the results. Both polynucleotide treatments gave better control of the Palmer amaranth compared to plants treated only with buffer and herbicide. Of the plants treated with the 10× ssDNA treatment, two of six were killed, and the remaining four were stunted in growth by 30%. Of the plants treated with the 1× dsRNA treatment, all six plants were killed by 8 days after WM spray or 10-day after dsRNA treatment.

Example 21

This example illustrates methods using compositions including topically applied polynucleotides for inducing systemic silencing in a plant. More specifically, this example describes selection of a polynucleotide sequence for inducing systemic silencing in a plant.

Twelve dsRNAs of approximately 250 bp each and having one strand of the dsRNA corresponding to the EPSPS tiled DNA sequences of SEQ ID NOS:41-52 (Table 8) were designed to cover in a tiling fashion the full coding sequence and part of the 5′ and 3′ untranslated regions of the Palmer amaranth EPSPS gene, as depicted in FIG. 25A.

TABLE 8

Tiling

segment

number

SEQ

(see FIG.

ID

25A)
Sequence
NO.

1
CGCCAGGGCTGCAGACGCGTTACGTANTCGGATCCAGAATTCGTGATTAAC
41

GTCACAGCATGTCATGTAAAACACGCGAATCAGACCGGTCCACTCTTGTTT

TAATTTGAGACAATTTTGATGTTGAGTCATCCCACACCAACCCCAAAAAAT

TCAACAACAAACTCTTATAATGATTCCCTCTACTCTACTAGAGTCTACACC

AACCCACTTTCTCTTTGCCCACCAAAACTTTGGTTTGGTAAGAACT

2
CACCAACCCACTTTCTCTTTGCCCACCAAAACTTTGGTTTGGTAAGAACTA
42

AGCCCTCTTCTTTCCCTTCTCTCTCTTAAAAGCCTAAAATCCACCTAACTTT

TTCAGCCAACAAACAACGCCAAATTCAGAGGAAGAATAATGATGGCTCAA

GCTACTACCATCAACAATGGTGTCCATACTGGTCAATTGCACCATACTTTA

CCCAAAACCCAGTTACCCAAATCTTCAAAAACTCTTAATT

3
CCATACTTTACCCAAAACCCAGTTACCCAAATCTTCAAAAACTCTTAATTTT
43

GGATCAAACTTGAGAATTTCTCCAAAGTTCATGTCTTTAACCAATAAAAGA

GTTGGTGGGCAATCATCAATTGTTCCCAAGATTCAAGCTTCTGTTGCTGCT

GCAGCTGAGAAACCTTCATCTGTCCCAGAAATTGTGTTACAACCCATCAAA

GAGATCTCTGGTACTGTTCAATTGCCTGGGTCAAAGTCTTTATCC

4
TCAAAGAGATCTCTGGTACTGTTCAATTGCCTGGGTCAAAGTCTTTATCCA
44

ATCGAATCCTTCTTTTAGCTGCTTTGTCTGAGGGCACAACAGTGGTCGACA

ACTTGCTGTATAGTGATGATATTCTTTATATGTTGGACGCTCTCAGAACTCT

TGGTTTAAAAGTGGAGGATGATAGTACAGCCAAAAGGGCAGTCGTAGAGG

GTTGTGGTGGTCTGTTTCCTGTTGGTAAAGATGGAAAGGAAGAGAT

5
GAGGGTTGTGGTGGTCTGTTTCCTGTTGGTAAAGATGGAAAGGAAGAGATT
45

CAACTTTTCCTTGGTAATGCAGGAACAGCGATGCGCCCATTGACAGCTGCG

GTTGCCGTTGCTGGAGGAAATTCAAGTTATGTGCTTGATGGAGTACCAAGA

ATGAGGGAGCGCCCCATTGGGGATCTGGTAGCAGGTCTAAAGCAACTTGG

TTCAGATGTAGATTGTTTTCTTGGCACAAATTGCCCTCCTGTTCGGG

6
TGGTTCAGATGTAGATTGTTTTCTTGGCACAAATTGCCCTCCTGTTCGGGTC
46

AATGCTAAAGGAGGCCTTCCAGGGGGCAAGGTCAAGCTCTCTGGATCGGT

TAGTAGCCAATATTTAACTGCACTTCTCATGGCTACTCCTTTGGGTCTTGGA

GACGTGGAGATTGAGATAGTTGATAAATTGATTTCTGTACCGTATGTTGAA

ATGACAATAAAGTTGATGGAACGCTTTGGAGTATCCGTAGAACAT

7
TTGAAATGACAATAAAGTTGATGGAACGCTTTGGAGTATCCGTAGAACAT
47

AGTGATAGTTGGGACAGGTTCTACATTCGAGGTGGTCAGAAATACAAATCT

CCTGGAAAGGCATATGTTGAGGGTGATGCTTCAAGTGCTAGCTACTTCCTA

GCCGGAGCCGCCGTCACTGGTGGGACTGTCACTGTCAAGGGTTGTGGAAC

AAGCAGTTTACAGGGTGATGTAAAATTTGCCGAAGTTCTTGAGAAGAT

8
ACAAGCAGTTTACAGGGTGATGTAAAATTTGCCGAAGTTCTTGAGAAGAT
48

GGGTTGCAAGGTCACCTGGACAGAGAATAGTGTAACTGTTACTGGACCAC

CCAGGGATTCATCTGGAAAGAAACATCTGCGTGCTATCGACGTCAACATG

AACAAAATGCCAGATGTTGCTATGACTCTTGCAGTTGTTGCCTTGTATGCA

GATGGGCCCACCGCCATCAGAGATGTGGCTAGCTGGAGAGTGAAGGAAA

9
AGATGGGCCCACCGCCATCAGAGATGTGGCTAGCTGGAGAGTGAAGGAAA
49

CCGAACGGATGATTGCCATTTGCACAGAACTGAGAAAGCTTGGGGCAACA

GTTGAGGAAGGATCTGATTACTGTGTGATCACTCCGCCTGAAAAGCTAAAC

CCCACCGCCATTGAAACTTATGACGATCACCGAATGGCCATGGCATTCTCT

CTTGCTGCCTGTGCAGATGTTCCCGTCACTATCCTTGATCCGGGATGC

10
CTCTTGCTGCCTGTGCAGATGTTCCCGTCACTATCCTTGATCCGGGATGCAC
50

CCGTAAAACCTTCCCGGACTACTTTGATGTTTTAGAAAAGTTCGCCAAGCA

TTGATGAGTAGCTATATACGAGATCCTTAAATTGTACGCCGAAGGTTTTGA

TTTGAGTCTAATAGTAGATAAAAGGCTATAAATAAACTGGCTTTCTGCTTG

AGTAATTATGAAATTCTTTGTATTATGTTTGTGAGATTTGAAGTAGCTTATA

11
TAATTATGAAATTCTTTGTATTATGTTTGTGAGATTTGAAGTAGCTTATAAA
51

TTACAATGTACTAAAGTCTAGAAATAAGTTATGTATCTTTTAAATCAATGA

GAAATGCATACTTGAAAGGCTTGACCTTGTATTTGTGACCTAAAGAGTACT

AACTTTGGAGTTTCCAACTCATTTGTTTATCTCATTTTTTTTTAATTTTTGAT

TTAAATTGTTTATTTTTATGAGTAATCATGTATCTTTCTTATTCTAACCAAA

TGTAATACTCCTTC

12
TATGAGTAATCATGTATCTTTCTTATTCTAACCAAATGTAATACTCCTTCCA
52

ACTCTCTTTAAACGTCCACACTCTGGGCACAGAGTGTAATAGTGTGGTGGT

TGGAGTCTTTTAAGTGATTATAATAATTGTAAATGTGGTAGTTAGAATATT

TTAAGTAATGTAGGTGGGGTATTATGGTCTTGTTGAACATAGGATATTTAG

GTAAAAAATCTATGCAAAAAAAGGAAAGTAAGCAAATAAAGCGAATTGA

CCTGAAAAGAAAAGTGGACATGTATAGTGAGTTGGAGGAAGTATTTT

The four oligonucleotide-size “short” EPSPS dsRNA molecules as described in Example 1 and FIG. 1 are located in the tiling segments 2, 3, 4, and 8 respectively, and are shown as light grey bars within those segments. The polynucleotides were synthesized in vitro transcription using a pBR322 vector with the EPSPS polynucleotides inserted at EcoRI and BamHI cloning sites; plasmid DNA was isolated with Qiagen Maxi prep kits and digested with EcoRI and BamHI restriction enzymes. The digested DNA solution was used in the treatment of the plants without further purification.

Glyphosate-resistant Palmer amaranth plants having 16 copies of EPSPS were treated as follows: spraying with 1% SILWET L-77® brand surfactant; (2) hand application of a dsRNA solution (containing polynucleotides selected from the twelve tiling segments or the four “short” dsRNA molecules described in Example 1 at the rate of 0.01 nanomole DNA/plant) or buffer as a control; and (3) 48 hours later spraying with glyphosate applied at 840 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide at a rate of 159 liters/acre. Above-ground height of the treated plants was observed 11 days after herbicide treatment; plants that were dead or dying were assigned a height of zero. Results are depicted in FIGS. 25B and 25C. The dsRNA polynucleotides combinations showing the greatest efficacy in this assay included the four “short” dsRNA molecules described in Example 1, the combination of tiling segments 2, 5, 8, and 11, and the combination of tiling segments 7, 8, and 9.

Example 22

This example illustrates methods using compositions including topically applied polynucleotides for inducing systemic silencing in a plant. More specifically, this example describes topical application of polynucleotides following application of herbicide to a plant.

In one assay, glyphosate-resistant Palmer amaranth plants having 16 copies of EPSPS were sprayed with glyphosate applied at 840 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide at a rate of 159 liters/acre. Two or 24 hours after herbicide application, the plants were treated by spraying with 1% SILWET L-77® brand surfactant. Fifteen to 20 minutes after SILWET® brand surfactant treatment, the plants were treated by hand application of either 0.8 nanomoles (“1×”) per plant of the four oligonucleotide-size “short” EPSPS dsRNA molecules as described in Example 1 in buffer containing 2% ammonium sulfate or buffer containing 2% ammonium sulfate. In this assay, untreated (“UT”) control plants were treated only with the 1% SILWET L-77® brand surfactant spray but not with herbicide or dsRNA. Results are depicted in FIG. 26. In this assay, application of 1% SILWET® brand surfactant resulted in improved glyphosate activity by 60% when applied 2 hours after herbicide spraying and by 20% when applied 24 hours after herbicide spraying. In this assay, application of 1% SILWET® brand surfactant followed by EPSPS dsRNA resulted in improved glyphosate activity by at least 80% when applied 2 hours after herbicide spraying and by 20% when applied 24 hours after herbicide spraying.

In another assay, Palmer amaranth plants grown from seeds in soil from a farm site in Macon, Ga. were sprayed with glyphosate applied at 840 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide at a rate of 159 liters/acre. Three days after herbicide treatment, 9 of 40 plants were killed and 3 were severely stunted. Surviving plants were sprayed with 1% SILWET L-77® brand surfactant, followed by topical application by hand of either 8 nanomoles (“10×”) per plant of the four oligonucleotide-size “short” EPSPS dsRNA molecules as described in Example 1 or buffer as a control. Three days later, 3 more plants in the dsRNA-treated group were dead and 2 more plants in the buffer-treated group were dead. At this point (6 days after the original herbicide treatment and 3 days after the SILWET® brand surfactant/dsRNA or buffer treatment), half of the surviving plants in each group were sprayed with a second application of glyphosate (applied at the same dose as in the first application). Two weeks after this second herbicide treatment, the remaining dsRNA-treated plants showed 80% injury and the remaining buffer-treated plants showed 40% injury.

Example 23

This example illustrates methods using compositions including topically applied polynucleotides for inducing systemic silencing in a plant. More specifically, this example describes a single-step topical application of a single composition including polynucleotides, surfactant, and herbicide for controlling herbicide-resistant weeds.

This assay was carried out on a field population of glyphosate-resistant Palmer amaranth plants that were known to have very high copy numbers of EPSPS (plants from this study site have been reported to have from 5 to more than 160 copies of EPSPS by Gaines et al. (2010) Proc. Natl. Acad. Sci. USA, 107:1029-1034). The polynucleotides used in this assay were an equimolar mixture of the four oligonucleotide-size “short” EPSPS dsRNA molecules as described in Example 1.

Four to six inch tall plants in a treatment area of 1 foot by 5 feet were sprayed in a single treatment with either 264 micrograms (“100×”) or 52.8 micrograms (“20×”) of the EPSPS dsRNAs in a solution that also contained 1% SILWET L-77® brand surfactant, 2% ammonium sulfate, and glyphosate (applied at 1682 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide at a rate of 159 liters/acre). For comparison, other plants in treatment areas of 1 foot by 5 feet were sprayed with glyphosate (in a solution that also contained 1% SILWET L-77® brand surfactant and 2% ammonium sulfate) applied at the same rate.

Results are depicted in FIG. 27. Treating the plants with only glyphosate (applied at 1682 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide at a rate of 159 liters/acre) in a solution that also contained SILWET L-77® brand surfactant and ammonium sulfate resulted in about 70% control (death of plants). The one-step treatment using a composition containing the 20× EPSPS dsRNA polynucleotides, surfactant, ammonium sulfate, and herbicide resulted in about 80-85% control of the glyphosate-resistant Palmer amaranth, which is the approximate control rate obtained by spraying with glyphosate applied at 6720 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide at a rate of 159 liters/acre (i.e., at 8 times the standard application rate of about 840 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide at a rate of 159 liters/acre). The one-step treatment using a composition containing the 100×EPSPS dsRNA polynucleotides, surfactant, ammonium sulfate, and herbicide resulted in about 90-95% control of the glyphosate-resistant Palmer amaranth, which is the approximate control rate obtained by spraying with glyphosate applied at 13440 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide at a rate of 159 liters/acre (i.e., at 16 times the standard application rate of about 840 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide at a rate of 159 liters/acre).

Example 24

This example illustrates a method for inducing systemic regulation of a target gene in a vegetable plant by topical application to the vegetable of a polynucleotide molecule including a segment with a nucleotide sequence essentially identical to, or essentially complementary to, a sequence of 18 or more contiguous nucleotides in either the target gene or RNA transcribed from the target gene, whereby the molecule permeates the interior of the vegetable plant and induces systemic regulation of the target gene. In this example, growing vegetable plants were treated with a topically applied composition for inducing systemic silencing of a target gene in a vegetable or fruit crop plant including (a) an agent for conditioning of a plant to permeation by polynucleotides and (b) polynucleotides including at least one polynucleotide strand including at least one segment of 18 or more contiguous nucleotides of the target gene in either anti-sense or sense orientation. More specifically, this example demonstrates the use of topically applied polynucleotides to induce systemic silencing of a phytoene desaturase (PDS) gene in a vegetable crop plant, i.e., lettuce (Lactuca sativa).

Lettuce PDS has the sequence ATGTCTCTGTTTGGAAATGTTTCTGCCATTAACTCAAGTGGAAAGTGTATAGTAATGAATCTTTCAAGCl ACACAAATCACTTCAAGAGATTGTTTCAAGATTACCTCAGGGCAAAAAGATGTTTTGTCATTTGGATG CTGTGATGCTATGGGTAACAGATTGCAATTCCCAAGTGCTCGTTCTTTTACACCAAGATCAAAGAAGA ATGTCTCCCCTCTAAAGGTAGTTTGTGTTGATTATCCAAGACCAGATCTTGATAACACATCTAATTTCT TGGAAGCTGCTCACTTGTCTTCAACCTTCAGAACTTCCCCACGCCCATCTAAGCCATTGAAGATTGTAA TTGCTGGTGCAGGTTTAGCTGGTTTATCAACTGCTAAGTATTTAGCTGATGCAGGTCACAAGCCAATTT TACTAGAAGCAAGAGATGTTCTTGGTGGAAAGGTGGCAGCTTGGAAAGATGATGATGGAGATTGGTA TGAGACAGGTTTACACATATTCTTTGGAGCTTACCCAAATGTACAAAATTTATTTGGAGAGCTAGGAA TTAATGATAGATTACAGTGGAAGGAGCATTCTATGATATTTGCAATGCCAAATAAGCCTGGAGAATTT AGTAGGTTTGACTTCCCAGATGTTTTACCTGCACCATTGAATGGAATTTTTGCTATATTGAGGAACAAT GAAATGCTGACGTGGCCTGAGAAAGTGAAGTTTGCAATTGGGCTGTTGCCTGCAATGTTAGGTGGACA GGCTTATGTTGAGGCCCAAGATGGGCTTAGTGTTCAGGACTGGATGAGAAAGCAAGGTATACCTGATC GAGTTACTACTGAAGTGTTTATTGCAATGTCAAAAGCATTAAACTTTATAAATCCAGATGAACTTTCAA TGCAATGTATTCTCATTGCTCTAAACCGTTTTCTTCAGGAAAAGCATGGTTCCAAGATGGCATTTTTAG ATGGGAGCCCACCAGAAAGACTTTGCAAGCCAATTGTTGACCACATCGAGTCACTCGGTGGCCAAGTC AGAGTCAACTCACGAATACAAAAAATTGAGTTAAACAAAGACGGAACTGTCCGGAACTTTCTATTGAG TGATGGGAATGTTCTAGAAGCTGATGCTTATGTTTTCGCTACCCCTGTTGACATTCTCAAGCTTCTTTTA CCCGAAGAATGGAAACCAATTCCATATTTCAAAAAATTAGAGAAGTTAGTCGGTGTTCCTGTTATAAA CGTTCATATATGGTTTGACAGAAAGCTGAAAAACACATATGATCACTTACTTTTCAGTAGGTCACCTCT GCTGAGTGTGTATGCTGACATGTCAGTGACATGTAAGGAATATTATGATCCGAATAAGTCAATGTTGG AGTTGGTTCTTGCTCCAGCTGAGGAATGGATTTCAAGAAGTGACACTGATATTATTGATGCAACAATG AGTGAACTTTCAAGGCTTTTTCCTGATGAAATTGCAGCTGATCAAAGTAAAGCAAAAATCTTGAAATA TAAAGTTGTTAAAACACCAAGGTCTGTTTATAAAACTGTTCCAGATTGTGAACCATGTCGACCCCTACA AAGATCTCCAATTCAAGGATTTTATTTATCTGGTGATTATACTAAACAAAAGTATTTGGCTTCAATGGG GGGTGCTGTTTTATCTGGAAAAATTTGTGCACAAGCTATTTTACAAGATTATGAGATGCTTGCTACA (SEQ ID NO:53). Polynucleotide single-stranded DNAs of 21-45 nucleotides in length with the following sequences were synthesized: taatacgactcactatagggtttggagcttacccaaATGtac (“HL286”, sense orientation, SEQ ID NO:54), taatacgactcactatagggaggccacgtcagcatttcattgttc (“HL287”, anti-sense orientation, SEQ ID NO:55), ccattcaATGgtgcaggtaaaac (“HL288”, anti-sense orientation, SEQ ID NO:56), catagaATGctccttccactg (“HL289”, anti-sense orientation, SEQ ID NO:57), and caaataaattttgtacatttgggtaagctccaa (“HL290”, anti-sense orientation, SEQ ID NO:58). An ssDNA solution was made with an equal mixture of all five polynucleotides in 0.01% SILWET L-77® brand surfactant in 5 millimolar sodium phosphate buffer, pH 6.8.

Lettuce variety LS49 “Green Tower” was used in the assays. Two fully expanded leaves of each plant were dipped into a freshly made 0.1% SILWET L-77® brand surfactant in double-distilled water solution for a few seconds. The leaves were allowed to dry for 15-30 minutes. Each plant was then treated by applying 20 microliters ssDNA solution to the top surface of two SILWET® brand surfactant-treated leaves (total 40 microliters per plant). Table 9 lists the assay conditions used and the observed bleaching of plants topically treated with ssDNA polynucleotides. FIG. 28 depicts the progression of bleaching and death of the lettuce plants treated with 1 nanomole ssDNA per plant at (from top to bottom) 37, 46, and 60 days after treatment.

TABLE 9

Amount of each

ssDNA applied
Earliest observation

Developmental stage
(nanomoles/plant)
of bleaching

4 weeks post-germination,
1
3 weeks post-treatment

plants have 2 fully

expanded leaves

5 weeks post-germination,
4
4 days post-treatment

plants have 4 fully

expanded leaves

The assays were repeated with 2 or 4 nanomoles ssDNA applied per plant. FIG. 29A depicts the systemic silencing evidenced by bleaching observed at 4 or 12 days after topical treatment with the polynucleotides.

The assays were repeated using each individual anti-sense ssDNAs (“HL287”, SEQ ID NO:55; “HL288”, SEQ ID NO:56; “HL289”, SEQ ID NO:57; and “HL290”, SEQ ID NO:58) with 8 nanomoles polynucleotide applied per plant; positive control plants were treated with a mixture of the four individual anti-sense ssDNAs at 2 nanomoles each (for a total of 8 nanomoles polynucleotide applied per plant) and negative control plants were treated only with buffer. FIG. 29B depicts the systemic silencing evidenced by bleaching observed at 4 after topical treatment with the anti-sense ssDNAs.

Example 25

Tomato PDS has the sequence

(SEQ ID NO: 59)

GGGTTTATCTCGCAAGTGTGGCTATGGTGGGACGTGTCAAATTTTGGA

TTGTAGCCAAACATGAGATTTGATTTAAAGGGAATTGGCCAAATCACC

GAAAGCAGGCATCTTCATCATAAATTAGTTTGTTTATTTATACAGAAT

TATACGCTTTTACTAGTTATAGCATTCGGTATCTTTTTCTGGGTAACT

GCCAAACCACCACAAATTTCAAGTTTCCATTTAACTCTTCAACTTCAA

CCCAACCAAATTTATTTGCTTAATTGTGCAGAACCACTCCCTATATCT

TCTAGGTGCTTTCATTCGTTCCGAGTAAAATGCCTCAAATTGGACTTG

TTTCTGCTGTTAACTTGAGAGTCCAAGGTAGTTCAGCTTATCTTTGGA

GCTCGAGGTCGTCTTCTTTGGGAACTGAAAGTCGAGATGGTTGCTTGC

AAAGGAATTCGTTATGTTTTGCTGGTAGCGAATCAATGGGTCATAAGT

TAAAGATTCGTACTCCCCATGCCACGACCAGAAGATTGGTTAAGGACT

TGGGGCCTTTAAAGGTCGTATGCATTGATTATCCAAGACCAGAGCTGG

ACAATACAGTTAACTATTTGGAGGCTGCATTTTTATCATCAACGTTCC

GTGCTTCTCCGCGCCCAACTAAACCATTGGAGATTGTTATTGCTGGTG

CAGGTTTGGGTGGTTTGTCTACAGCAAAATATTTGGCAGATGCTGGTC

ACAAACCGATACTGCTGGAGGCAAGGGATGTTCTAGGTGGAAAGGTAG

CTGCATGGAAAGATGATGATGGAGATTGGTACGAGACTGGTTTGCATA

TATTCTTTGGGGCTTACCCAAATATTCAGAACCTGTTTGGAGAATTAG

GGATTAACGATCGATTGCAATGGAAGGAACATTCAATGATATTTGCAA

TGCCAAGCAAGCCAGGAGAATTCAGCCGCTTTGATTTCTCCGAAGCTT

TACCCGCTCCTTTAAATGGAATTTTAGCCATCTTAAAGAATAACGAAA

TGCTTACATGGCCAGAGAAAGTCAAATTTGCAATTGGACTCTTGCCAG

CAATGCTTGGAGGGCAATCTTATGTTGAAGCTCAAGATGGGATAAGTG

TTAAGGACTGGATGAGAAAGCAAGGTGTGCCGGACAGGGTGACAGATG

AGGTGTTCATTGCTATGTCAAAGGCACTCAACTTTATAAACCCTGACG

AACTTTCAATGCAGTGCATTTTGATCGCATTGAACAGGTTTCTTCAGG

AGAAACATGGTTCAAAAATGGCCTTTTTAGATGGTAATCCTCCTGAGA

GACTTTGCATGCCGATTGTTGAACACATTGAGTCAAAAGGTGGCCAAG

TCAGACTGAACTCACGAATAAAAAAGATTGAGCTGAATGAGGATGGAA

GTGTCAAGAGTTTTATACTGAGTGACGGTAGTGCAATCGAGGGAGATG

CTTTTGTGTTTGCCGCTCCAGTGGATATTTTCAAGCTTCTATTGCCTG

AAGACTGGAAAGAGATTCCATATTTCCAAAAGTTGGAGAAGTTAGTCG

GAGTACCTGTGATAAATGTACATATATGGTTTGACAGAAAACTGAAGA

ACACATATGATCATTTGCTCTTCAGCAGAAGCTCACTGCTCAGTGTGT

ATGCTGACATGTCTGTTACATGTAAGGAATATTACAACCCCAATCAGT

CTATGTTGGAATTGGTTTTTGCACCTGCAGAAGAGTGGATATCTCGCA

GCGACTCAGAAATTATTGATGCAACGATGAAGGAACTAGCAACGCTTT

TTCCTGATGAAATTTCAGCAGATCAAAGCAAAGCAAAAATATTGAAGT

ACCATGTTGTCAAAACTCCGAGGTCTGTTTATAAAACTGTGCCAGGTT

GTGAACCCTGTCGGCCTTTACAAAGATCCCCAATAGAGGGGTTTTATT

TAGCCGGTGACTACACGAAACAGAAATACTTGGCTTCAATGGAAGGCG

CTGTCTTATCAGGAAAGCTTTGTGCTCAAGCTATTGTACAGGATTATG

AGTTACTTGTTGGACGTAGCCAAAAGAAGTTGTCGGAAGCAAGCGTAG

TTTAGCTTTGTGGTTATTATTTAGCTTCTGTACACTAAATTTATGATG

CAAGAAGCGTTGTACACAACATATAGAAGAAGAGTGCGAGGTGAAGCA

AGTAGGAGAAATGTTAGGAAAGCTCCTATACAAAAGGATGGCATGTTG

AAGATTAGCATCTTTTTAATCCCAAGTTTAAATATAAAGCATATTTTA

TGTACCACTTTCTTTATCTGGGGTTTGTAATCCCTTTATATCTTTATG

CAATCTTTACGTTAGTTAAAAAAAAAAAAAAAAAAAAAAACTCGA.

A 201 nucleotide dsRNA polynucleotide with an anti-sense strand capable of hybridizing to the RNA encoded by the sequence TCGCAGCGACTCAGAAATTATTGATGCAACGATGAAGGAACTAGCAACGCTTTTTCCTGATGAAATTT CAGCAGATCAAAGCAAAGCAAAAATATTGAAGTACCATGTTGTCAAAACTCCGAGGTCTGTTTATAAA ACTGTGCCAGGTTGTGAACCCTGTCGGCCTTTACAAAGATCCCCAATAGAGGGGTTTTATTTAG (SEQ ID NO:60) which correspond to the nucleotides at positions 1724-1923 of the mRNA transcribed from the tomato PDS gene sequence (SEQ ID NO:59) was synthesized by RT PCR using oligonucleotide primers with the sequences TAATACGACTCACTATAGGGTCGCAGCGACTCAGAAATTATTG (SEQ ID NO:61, sense primer) and TAATACGACTCACTATAGGGGTAAAGGCCGACAGGGTTCACAACC (SEQ ID NO:62, anti-sense primer). A 2.5 micromolar dsRNA solution was made with the 201 nucleotide dsRNA polynucleotide (SEQ ID NO:60) in 0.01% SILWET L-77® brand surfactant in 5 millimolar sodium phosphate buffer, pH 6.8.

Three-week old tomato seedlings were treated as follows. Two fully expanded leaves were dipped into a freshly made 0.1% SILWET L-77® brand surfactant solution in double-distilled water for a few seconds. The leaves were allowed to dry for 30 minutes to 1 hour. Each plant was then treated by applying 20 microliters dsRNA solution to the top surface of two SILWET® brand surfactant-treated leaves (total 40 microliters per plant). Control plants were treated with buffer. The plants were kept in a growth chamber for observation. FIG. 30 depicts the systemic silencing of the target gene PDS as evidenced by bleaching of the dsRNA-treated plants 30 days after topical treatment. The dsRNA-treated plants were severely stunted, compared to control plants.

Example 26

This example illustrates an improvement to herbicidal compositions adapted for topical coating onto the exterior surface of a growing plant where the plant lethal agent includes polynucleotides having a sequence essentially identical or complementary to sequences of one or more plant genes or sequence of transcribed DNA from the plant genes. The polynucleotides effect systemic suppression of the plant gene in plant organs or tissues other than those that received the topical polynucleotide application. More specifically this example illustrates an herbicidal composition adapted for topical coating onto the exterior surface of a growing plant comprising surfactant and at least one plant lethal agent including combinations of polynucleotides having sequence targeting the 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) gene, a transcription initiation factor (TIF), and DNA-dependent ATPase (ddATPase) in Palmer amaranth.

The herbicidal composition includes at least one of the following 21-base-pair double-stranded RNA polynucleotides:

(1) nDsRNA1: sense strand

(SEQ ID NO: 63)

CUACCAUCAACAAUGGUGUCC

and

anti-sense strand

(SEQ ID NO: 64)

GGACACCAUUGUUGAUGGUAG

(2) nDsRNA3: sense strand

(SEQ ID NO: 65)

GUCGACAACUUGCUGUAUAGU

and

anti-sense strand

(SEQ ID NO: 66)

ACUAUACAGCAAGUUGUCGAC

(3) nDsRNA4: sense strand

(SEQ ID NO: 67)

GGUCACCUGGACAGAGAAUAG

and

anti-sense strand

(SEQ ID NO: 68)

CUAUUCUCUGUCCAGGUGACC

(4) nDsNA5: sense strand

(SEQ ID NO: 69)

AAUGCCAGAUGUUGCUAUGAC

and

anti-sense strand

(SEQ ID NO: 70)

GUCAUAGCAACAUCUGGCAUU

A mixture of multiple polynucleotides is advantageous for preventing selection of resistance in the treated plants. In an embodiment, the herbicidal composition includes a mixture of all four of the above dsRNA polynucleotides having SEQ ID NOS: 63-70. In another embodiment, the herbicidal composition includes single-stranded DNA polynucleotides with deoxyribonucleotide sequences corresponding to one or more of the dsRNA sequences SEQ ID NOS: 63-70. In another embodiment, the herbicidal composition includes RNA/DNA hybrids with nucleotide sequences corresponding to one or more of the dsRNA sequences SEQ ID NOS: 63-70. In another embodiment, the herbicidal composition includes dsRNA polynucleotides where the 2′ hydroxyls are methylated for stability.

The herbicidal composition includes a surfactant such as SILWET L-77® brand surfactant (or other effective surfactants such as those provided in Example 36). Optionally, the herbicidal composition can include one or more additives such as a salt, chelating agent, or a humectant (such as those provided in Example 35) to improve herbicidal performance, e.g., by enhancing transfer of the polynucleotide into the interior of the plant, enhancing efficacy of the polynucleotides, or potentiating the herbicidal activity of the non-polynucleotide herbicide.

Optionally the herbicidal composition includes polynucleotides designed to regulate multiple genes in the plant. In an embodiment, the herbicidal composition includes polynucleotides having sequence essentially identical or complementary to the sequence of a second gene or to the sequence of RNA transcribed from the second gene, wherein the regulation of the second gene provides a synergistic enhancement of the herbicidal activity of the composition.

In an embodiment, the herbicidal composition includes polynucleotides having sequence essentially identical or complementary to the sequence of the endogenous Palmer amaranth 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) gene or to the sequence of RNA transcribed from the endogenous EPSPS gene as well as polynucleotides having sequence essentially identical or complementary to the sequence of the endogenous Palmer translation initiation factor (TIF) gene or to the sequence of RNA transcribed from the endogenous TIF gene. Translation initiation factor (TIF) is a nuclear-encoded chloroplast protein that is essential for initiating protein synthesis and is expressed throughout a plant. Arabidopsis thaliana has an orthologue named AT1G17220.1 (described on the publicly available database The Arabidopsis Information Resource found online at www.arabidopsis.org/servlets/TairObject?type=locus&name=AT1G17220) and assigned GenBank accession number GI:186478573, which has been identified as a chloroplast localized protein with similarity to bacterial translation initiation factor 2; see also Miura et al. (2007) Plant Cell, 19:1313-1328 for a description of this gene. TIF sequences were identified from Palmer amaranth (Amaranthus palmeri); one TIF gene was identified to have the sequence of SEQ ID NO:71. Examples of polynucleotides for suppression of this TIF gene in Amaranthus palmeri are listed in Table 10.

TABLE 10

Position in

SEQ

Poly-
TIF

ID

nucleotide
sequence
Sequence
NO.

Palmer
Entire
ATGGCAACAATGGCTTCCCTAGTGAGTTTGGGAAGCTCTGGAG
71

amaranth TIF
sequence of
CAACTTGCTCAGGGCAATTGGAGGTTTCCTTTTCATTGGTTAAG

SEQ ID
AAAATTACATTGCCTAGAAGAAATTGTAGTTGCAATTTTAGGCA

NO: 71
ATTAGGAGGGGGGAGGAGATGGCGTTACGTTTCGGTGTGTAGA

CTTTCTGTCACTACTGATTATGTTTCTGAGCAAGGAAATGCTGT

TTCTCTTGAAAATGCATATAGTGAGAGTAAAGAAGAGGGTCTC

ATCTTGAAGCCTTCTCCTAAGCCGGTTTTGAAATCCGGGTCTGA

TGGAAATCGGAAATTTGGGGAGAGTTCGGTGGCGTTTTCGAGT

AATGGGAAATTGGATAATGTAGAGGAGAGGAAGAAGGTTATTG

ATTCATTGGATGAGGTATTAGAAAAGGCCGAGAGATTAGAAAC

GGCGAACTTACAAGCAGATAATAGAAAGGATAGCACAAATGTA

AATAAACCGTCTCCGAGTGTAAGTAGTTCAACCAATGGTAAAC

CTGTAAATAATTTGAACAAAGGGAAGCCTAAAGCTGCGAAGAG

CGTTTGGAGAAAGGGAAATCCAGTTTCTACTGTGCAAAAAGTA

GTGCAAGAATCTCCGAAGATTGAAAAGGTTGAGAGAGTGGAAG

CTCGAACGACCAGCCAATCGTCTGAAACGATAAGACCCCCAGT

GCCACTACAGAGGCCTGAGATTAAGTTGCAGGCAAAGCCTTCT

ACTGCTCCTCCACCCATGCCTAAGAAGCCGGTTTTGAAGGATGT

GGGGATGTCCTCCAGAGCTGATGGGAAGGACCAGTCTGTGAAA

TCTAAAGAGAGGAAGCCTATTCTAGTGGACAAATTTGCCACCA

AGAAGGCATCAGTTGATCCGTCGATTGCTCAAGCAGTAATTGC

CCCACCAAAACCTGCTAAATTTCCTTCTGGAAAGTTTAAAGATG

ATTATCGGAAGAAGGGTCTTGCAGCTGGTGGGCCGAAGAGGCG

TATGGTCAATGATGATGATATTGAAATGCATGAAGACACTTCA

GAGCTCGGTCTTTCTATTCCTGGTGCTGCTACGGCTCGGAAAGG

CAGGAAATGGAGTAAGGCAAGTCGCAAGGCTGCCAGACGCCA

AGCAGCTAGAGATGCCGCTCCTGTTAAAGTGGAAATCTTAGAG

GTTGAAGAAAAGGGCATGTCGACCGAAGAATTAGCATACAACT

TGGCTATTAGCGAAGGTGAAATTCTTGGGTACCTGTATTCTAAG

GGGATAAAACCAGATGGTGTGCAAACTCTTGACAAGGCAATGG

TAAAGATGATATGTGAAAGATATGACGTGGAGGTTTTGGACGC

ACTTTCTGAACAAATGGAAGAAATGGCTCGAAAGAAGGAAATT

TTCGACGAAGATGACCTTGACAAGCTTGAAGATAGGCCTCCTG

TGCTTACTATAATGGGTCATGTAGATCATGGCAAGACGACCCTT

CTGGATTATATACGGAAGAGCAAGGTTGCTGCTTCTGAAGCTG

GTGGGATTACACAAGGTATTGGTGCTTATAAAGTGGAAGTACC

GGTTGATGGCAAGTTGCTGCCTTGTGTCTTTCTTGACACTCCCG

GACACGAGGCGTTCGGGGCAATGAGGGCTCGTGGAGCAAGAGT

GACAGATATTGCTATTATAGTTGTAGCTGCTGACGATGGGATCC

GTCCTCAAACAAATGAAGCCATAGCACATGCAAAAGCAGCTGG

TGTACCTATTGTGGTTGCAATTAATAAGATTGACAAGGATGGG

GCTAATCCGGACCGTGTGATGCAAGAGCTTTCATCAATTGGTCT

AATGCCAGAGGATTGGGGTGGTGATACCCCAATGGTCAAGATA

AGTGCTCTAAAAGGTGAAAATGTGGACGAGTTACTCGAGACAG

CCATGCTTGTCGCCGAGTTGCAAGAGTTAAAGGCTAATCCTCAG

AGGAACGCTAAGGGCACTGTAATTGAGGCTGGTCTTCATAAAT

CAAAAGGACCCATTGCCACTTTTATTGTGCAGAATGGTACCCTC

AAACAAGGGGATACTGTAGTTTGTGGGGAAGCATTTGGGAAGG

TTCGTGCCCTATTTGATCACGGAGGGAATCGCGTTGATGAAGCT

GGTCCATCTATTCCCGTGCAGGTTATTGGATTGAATAATGTTCC

TTTTGCCGGTGATGAGTTCGAGGTAGTGAGTTCCCTTGATATAG

CTCGTGAAAAGGCAGAGGTCCGTGCAGAGTCTTTACGAAATGA

GCGTATAGCTGCTAAGGCCGGAGACGGAAAGGTTACGCTGTCA

TCCTTGGCATCGGCTGTTTCTTCAGGGAAGATGGCTGGTTTGGA

TTTGCACCAGTTAAATATCATTTTGAAGGTTGATGTTCAGGGAT

CAATCGAGGCATTGAGGCAAGCTCTAGAAGTTCTTCCTCAAGA

TAACGTCACTTTGAAGTTTCTCTTACAAGCGACCGGAGATGTTA

CTACAAGTGATGTTGATCTTGCAGTTGCTAGTAAAGCTATTATC

TTGGGGTTCAATGTGAAGGCACCAGGTTCTGTCGAAAAATTAG

CAGATAACAAAGGTGTTGAAATTCGGCTTTATAAAGTCATTTAT

GATCTAATTGACGACATGCGGAGTGCAATGGAAGGAATGCTAG

ATCCCGTTGAGGAACAAGTTGCAATTGGTTCAGCCGAAGTGCG

GGCTACATTCAGTAGTGGTAGTGGCCGTGTCGCTGGATGCATG

GTGACCGAGGGAAAGATTACCAAAGGCTGTGGGATTCGAGTGA

TACGGAAGGGAAAAACTGTCCACGTTGGAGTTCTTGATTCGTTG

CGTCGAGTAA

200 bp DNA
341-541
TTTCGAGTAATGGGAAATTGGATAATGTAGAGGAGAGGAAGAA
72

GGTTATTGATTCATTGGATGAGGTATTAGAAAAGGCCGAGAGA

TTAGAAACGGCGAACTTACAAGCAGATAATAGAAAGGATAGCA

CAAATGTAAATAAACCGTCTCCGAGTGTAAGTAGTTCAACCAA

TGGTAAACCTGTAAATAATTTGAACAAA

160 bp
342-501
Sense:
73

dsRNA

UUCGAGUAAUGGGAAAUUGGAUAAUGUAGAGGAGAGGAAGA

AGGUUAUUGAUUCAUUGGAUGAGGUAUUAGAAAAGGCCGAG

AGAUUAGAAACGGCGAACUUACAAGCAGAUAAUAGAAAGGA

UAGCACAAAUGUAAAUAAACCGUCUCCGAGUGUAAGU

Anti-sense:
74

ACUUACACUCGGAGACGGUUUAUUUACAUUUGUGCUAUCCUU

UCUAUUAUCUGCUUGUAAGUUCGCCGUUUCUAAUCUCUCGGC

CUUUUCUAAUACCUCAUCCAAUGAAUCAAUAACCUUCUUCCU

CUCCUCUACAUUAUCCAAUUUCCCAUUACUCGAA

anti-sense
555-576
ATTTCTCCAAACGCTCTTCGCA
75

DNA

TIF_AS1

anti-sense
342-363
ATCCAATTTCCCATTACTCGAA
76

DNA

TIF_AS2

anti-sense
412-433
GTTTCTAATCTCTCGGCCTTTT
77

DNA

TIF_AS3

anti-sense
488-509
TTGAACTACTTACACTCGGAG
78

DNA

TIF_AS4

anti-sense
368-389
TAACCTTCTTCCTCTCCTCTA
79

DNA

TIF_AS5

anti-sense
790-811
GTCCTTCCCATCAGCTCTGGA
80

DNA

TIF_AS6

anti-sense
1052-1073
CGTAGCAGCACCAGGAATAG
81

DNA

TIF_AS7

anti-sense
1655-1676
CAGCAGCTACAACTATAATAG
82

DNA

TIF_AS8

In an embodiment, the herbicidal composition includes a mixture of at least two of the above EPSPS dsRNA polynucleotides having SEQ ID NOS: 63-70 and also at least one polynucleotide having sequence essentially identical or complementary to the sequence of the endogenous Palmer translation initiation factor (TIF) gene or to the sequence of RNA transcribed from the endogenous TIF gene, such as those provided in Table 10. In a specific embodiment, the herbicidal composition includes a mixture of the four EPSPS dsRNA polynucleotides having SEQ ID NOS: 63-70 and a 160 base-pair TIF double-stranded RNA polynucleotide having the sense sequence of UUCGAGUAAUGGGAAAUUGGAUAAUGUAGAGGAGAGGAAGAAGGUUAUUGAUUC AUUGGAUGAGGUAUUAGAAAAGGCCGAGAGAUUAGAAACGGCGAACUUACAAGC AGAUAAUAGAAAGGAUAGCACAAAUGUAAAUAAACCGUCUCCGAGUGUAAGU (SEQ ID NO. 73) and the anti-sense sequence of ACUUACACUCGGAGACGGUUUAUUUACAUUUGUGCUAUCCUUUCUAUUAUCUGC UUGUAAGUUCGCCGUUUCUAAUCUCUCGGCCUUUUCUAAUACCUCAUCCAAUGAA UCAAUAACCUUCUUCCUCUCCUCUACAUUAUCCAAUUUCCCAUUACUCGAA (SEQ ID NO. 74).

In some embodiments, the polynucleotides are designed to regulate multiple target genes, resulting in a synergistic effect on herbicide activity. For example, a synergistic effect on herbicide activity was obtained by treatment of a plant with polynucleotides designed to suppress a translation initiation factor (TIF) and 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) followed by treatment with the non-polynucleotide herbicide glyphosate.

The polynucleotides listed in Table 11 were produced by synthesis or by in vitro transcription.

TABLE 11

Name
Comments
Nucleotide sequences

IDT [1]
Palmer/EPSPS
Sense:

dsRNA with two 2-
CUACCAUCAACAAUGGUGUCCAUAC

deoxyribonucleotides
(SEQ ID NO. 83)

(in bold
Anti-sense:

underlined text) at
GUAUGGACACCAUUGUUGAUGGUAGUA

3′ end of sense
(SEQ ID NO. 84)

IDT [2]
strand (25-mer) and
Sense:

a 2-nucleotide
AGUUGGUGGGCAAUCAUCAAUUGTT

overhang at 3′ end
(SEQ ID NO. 85)

of anti-sense strand
Anti-sense:

(27-mer);
AACAAUUGAUGAUUGCCCACCAACUCU

chemically
(SEQ ID NO. 86)

IDT [3]
synthesized by IDT
Sense:

GGUCGACAACUUGCUGUAUAGUGAT

(SEQ ID NO. 87)

Anti-sense:

AUCACUAUACAGCAAGUUGUCGACCUC

(SEQ ID NO. 88)

IDT [4]

Sense:

UGCAAGGUCACCUGGACAGAGAATA

(SEQ ID NO. 89)

Anti-sense:

UAUUCUCUGUCCAGGUGACCUUGCAAC

(SEQ ID NO. 90)

IDT [5]
Palmer/EPSPS
Sense:

dsRNA (21-
AACAUGAACAAAAUGCCAGAU

mer) with blunt
(SEQ ID NO. 91)

ends;
Anti-sense:

chemically
AUCUGGCAUUUUGUUCAUGUU

synthesized by
(SEQ ID NO. 92)

IDT

IDT blunt
Palmer/EPSPS
1S-Anti-sense

[1]
dsRNA (27-
GUAUGGACACCAUUGUUGAUGGUAGUA

mer) with blunt
(SEQ ID NO. 93)

ends;
1S-Sense

synthesized via
UACUACCAUCAACAAUGGUGUCCAUAC

in vitro T7
(SEQ ID NO. 94)

IDT blunt
transcription
2S-Anti-sense

[2]

AAUAAUUGAUGAUUGCCCACCAACUCU

(SEQ ID NO. 95)

2S-Sense

AGAGUUGGUGGGCAAUCAUCAAUUAUU

(SEQ ID NO. 96)

IDT blunt

3S-Anti-sense

[3]

AUCACUAUACAGCAAGUUGUCGACCAC

(SEQ ID NO. 97)

3S-Sense

GUGGUCGACAACUUGCUGUAUAGUGAU

(SEQ ID NO. 98)

IDT blunt

4S-Anti-sense

[4]

UAUUCUCUGUCCAGGUGACCUUGCAAC

(SEQ ID NO. 99)

4S-Sense

GUUGCAAGGUCACCUGGACAGAGAAUA

(SEQ ID NO. 100)

3OH [1]
Palmer/EPSPS
1S-Anti-sense

dsRNA (27-
gGUAUGGACACCAUUGUUGAUGGUAGUAC

mer) with 3′-
(SEQ ID NO. 101)

overhangs;
1S-Sense

synthesized via
GCUACCAUCAACAAUGGUGUCCAUACCAC

in vitro T7
(SEQ ID NO. 102)

3OH [2]
transcription
2S-Anti-sense

gAAGAAUUGAUGAUUGCCCACCAACUCAC

(SEQ ID NO. 103)

2S-Sense

GAGUUGGUGGGCAAUCAUCAAUUAUUCAC

(SEQ ID NO. 104)

3OH [3]

3S-Anti-sense

gAUCACUAUACAGCAAGUUGUCGACAC

(SEQ ID NO. 105)

3S-Sense

GUCGACAACUUGCUGUAUAGUGAUCAC

(SEQ ID NO. 106)

3OH [4]

4S-Anti-sense

gUAUUCUCUGUCCAGGUGACCUUGCACAC

(SEQ ID NO. 107)

4S-Sense

GUGCAAGGUCACCUGGACAGAGAAUACAC

(SEQ ID NO. 108)

IDT HP [1]
Palmer/EPSPS
1S-

single strand of
GUAUGGACACCAUUGUUGAUGGUAGUAGAAAUACUACCAUCAACAA

RNA designed
UGGUGUCCAUAC

to self-hybridize
(SEQ ID NO. 109)

IDT HP [2]
into a hairpin,
2S-

containing anti-
AUAAUUGAUGAUUGCCCACCAACUCUGAAAAGAGUUGGUGGGCAAUC

sense sequence
UCAAUUAUU

on the 5′ arm
(SEQ ID NO. 110)

IDT HP [3]
and anti-sense
3S-

sequence on the
AUCACUAUACAGCAAGUUGUCGACCACGAAAGUGGUCGACAACUUG

3′ arm, with an
CUGUAUAGUGAU

intermediate
(SEQ ID NO. 111)

IDT HP [4]
GAAA
4S-

tetranucleotide
UAUUCUCUGUCCAGGUGACCUUGCAACGAAAGUUGCAAGGUCACC

loop;
UGGACAGAGAAUA

chemically
(SEQ ID NO. 112)

synthesized by

IDT

[TIF]
Palmer/translation
Sense:

initiation factor
UUCGAGUAAUGGGAAAUUGGAUAAUGUAGAGGAGAGGAAGAAGGUU

(TIF) dsRNA (160-
AUUGAUUCAUUGGAUGAGGUAUUAGAAAAGGCCGAGAGAUUAGAAA

mer) synthesized
CGGCGAACUUACAAGCAGAUAAUAGAAAGGAUAGCACAAAUGUAAAU

via in vitro T7
AAACCGUCUCCGAGUGUAAGU

transcription
(SEQ ID NO. 73)

Anti-sense:

ACUUACACUCGGAGACGGUUUAUUUACAUUUGUGCUAUCCUUUCUAU

UAUCUGCUUGUAAGUUCGCCGUUUCUAAUCUCUCGGCCUUUUCUAAU

ACCUCAUCCAAUGAAUCAAUAACCUUCUUCCUCUCCUCUACAUUAUC

CAAUUUCCCAUUACUCGAA

(SEQ ID NO. 74)

[ddATPase]
Palmer/DNA-
Sense:

dependent ATPase
GAUCACAAAUUUGCCGGUUUAUGAUCAAAUACGGAACAUAAGACAGA

(ddATPase)
UACACUUGAACACCAUGAUUCGCAUUGGGGGUGUGGUUACUCGUCGU

dsRNA (168-mer)
UCUGGAGUAUUCCCUCAGUUGAUGCAGGUGAAGUAUGACUGCAAUAA

synthesized via in
AUGUGGGGCUAUCCUGGGUCCCUUUUU

vitro T7
(SEQ ID NO. 113)

transcription
Anti-sense:

AAAAAGGGACCCAGGAUAGCCCCACAUUUAUUGCAGUCAUACUUCAC

CUGCAUCAACUGAGGGAAUACUCCAGAACGACGAGUAACCACACCCC

CAAUGCGAAUCAUGGUGUUCAAGUGUAUCUGUCUUAUGUUCCGUAUU

UGAUCAUAAACCGGCAAAUUUGUGAUC

(SEQ ID NO. 114)

Solutions of the polynucleotides were prepared and applied to the leaves of Palmer amaranth using the protocols described in Table 12.

TABLE 12

Protocol

number

(description)
Protocol

1
1. Apply mixture of polynucleotides in 1% SILWET L-77 ® brand surfactant, 2% ammonium

(1-step hand)
sulfate in 10 millimolar sodium phosphate buffer, pH 6.8 (or control

buffer solution of 1% SILWET L-77 ® brand surfactant,

2% ammonium sulfate in 10 millimolar sodium phosphate buffer, pH 6.8) by hand pipetting

2. 48 or 72 hours later, spray glyphosate (“2X Wmax” or 1682 g acid equivalent per hectare

of Roundup ® WeatherMAX ® brand herbicide) by regular sprayer (10 gallons/acre)

2
1. Spray mixture of polynucleotides in 1% SILWET L-77 ® brand surfactant, 2% ammonium

(1-step sprayer)
sulfate in 10 millimolar sodium phosphate buffer, pH 6.8 (or control

buffer solution of SILWET L-77 ® brand surfactant,

2% ammonium sulfate in 10 millimolar sodium phosphate buffer, pH 6.8) by Milli sprayer

2. 48 or 72 hours later, spray glyphosate (“2X Wmax” or 1682 g acid equivalent per hectare

of Roundup ® WeatherMAX ® brand herbicide) by regular sprayer (10 gallons/acre)

3
1. Spray 1% SILWET L-77 ® brand surfactant as 1^ststep by regular sprayer or Milli sprayer;

(2-step hand)
2. Apply mixture of polynucleotides in 1% SILWET L-77 ® brand surfactant, 2% ammonium

sulfate in 10 millimolar sodium phosphate buffer, pH 6.8 (or control

buffer solution of 1% SILWET L-77 ® brand surfactant,

2% ammonium sulfate in 10 millimolar sodium phosphate buffer, pH 6.8) by hand pipetting

3. 48 or 72 hours later, spray glyphosate (“2X Wmax” or 1682 g acid equivalent per hectare

of Roundup ® WeatherMAX ® brand herbicide) by regular sprayer (10 gallons/acre)

4
1. Spray 1% SILWET L-77 ® brand surfactant as 1^ststep by regular sprayer or Milli sprayer;

(2-step sprayer)
2. Spray mixture of polynucleotides in 1% SILWET L-77 ® brand surfactant, 2% ammonium

sulfate in 10 millimolar sodium phosphate buffer, pH 6.8 (or control

buffer solution of 1% SILWET L-77 ® brand surfactant,

2% ammonium sulfate in 10 millimolar sodium phosphate buffer, pH 6.8) by Milli sprayer

3. 48 or 72 hours later, spray glyphosate (“2X Wmax” or 1682 g acid equivalent per hectare

of Roundup ® WeatherMAX ® brand herbicide) by regular sprayer (10 gallons/acre)

5
Spray mixture of polynucleotides in 1% SILWET L-77 ® brand surfactant, 2% ammonium sulfate

(tank mix)
in 10 millimolar sodium phosphate buffer, pH 6.8 containing glyphosate at 1682 g acid

equivalent per hectare of Roundup ® WeatherMAX ® brand herbicide

(or control buffer solution of 1% SILWET L-77 ® brand surfactant,

2% ammonium sulfate in 10 millimolar sodium phosphate buffer, pH 6.8 containing

glyphosate at 1682 g acid equivalent per hectare of Roundup ® WeatherMAX ® brand

herbicide) by Milli sprayer.

Combinations of polynucleotides were tested as indicated in Table 13.

TABLE 13

Amount

applied of
Total

Polynucleotides
SEQ

each
polynucleotide
EPSPS

applied in
ID

polynucleotide
applied
copy

combination
NO.
Protocol
(g/acre)
(g/acre)
number*
Results**

IDT [1]
83, 84,
1
0.29
0.87
112
75% killed

IDT [3]
87, 88

0.29

(27 DAT)

IDT [4]
89, 90

0.29

IDT [1]
83, 84,
1
0.29
1.4
112
100% killed

IDT [3]
87, 88

0.29

(27 DAT)

IDT [4]
89, 90

0.29

[TIF]
73, 74

0.50

IDT [1]
83, 84,
1
0.29
1.37
112
11.2%

IDT [3]
87, 88

0.29

stunted

IDT [4]
89, 90

0.29

(27 DAT)

[ddATPase]
113, 114

0.50

IDT [1]
83, 84,
1
0.29
1.87
112
100% killed

IDT [3]
87, 88

0.29

(27 DAT)

IDT [4]
89, 90

0.29

[TIF]
73, 74

0.50

[ddATPase]
114, 114

0.50

IDT [1]
83, 84,
1
0.29
1.2
112, 36
0% control

IDT [2]
85, 86

0.29

(11 DAT);

IDT [3]
87, 88

0.29

0% control

IDT [4]
89, 90

0.29

(31 DAT)

IDT [1]
83, 84,
1
1.4
5.8
112, 36
0% control

IDT [2]
85, 86

1.4

(11 DAT);

IDT [3]
87, 88

1.4

15% stunted

IDT [4]
89, 90

1.4

(31 DAT)

IDT [1]
83, 84,
1
2.9
12
112, 36
0% control

IDT [2]
85, 86

2.9

(11 DAT);

IDT [3]
87, 88

2.9

35% stunted

IDT [4]
89, 90

2.9

(31 DAT)

IDT [1]
83, 84,
1
5.8
23
112, 36
51% stunted

IDT [2]
85, 86

5.8

(11 DAT);

IDT [3]
87, 88

5.8

100%

IDT [4]
89, 90

5.8

stunted (31

DAT)

IDT [1]
83, 84,
2
0.29
1.2
33, 54
9% stunted

IDT [2]
85, 86

0.29

(6 DAT)

IDT [3]
87, 88

0.29

IDT [4]
89, 90

0.29

IDT [1]
83, 84,
2
5.8
23
33, 54
100% killed

IDT [2]
85, 86

5.8

(6 DAT)

IDT [3]
87, 88

5.8

IDT [4]
89, 90

5.8

IDT [1]
83, 84,
2
0.29
0.87
33, 54
20% stunted

IDT [3]
87, 88

0.29

(6 DAT)

IDT [4]
89, 90

0.29

IDT [1]
83, 84,
2
5.8
17
33, 54
100% killed

IDT [3]
87, 88

5.8

(6 DAT)

IDT [4]
89, 90

5.8

IDT [5]
91, 92
1
0.29
0.29
34, 36, 54
14.1%

stunted

(22 DAT)

IDT [5]
91, 92
1
2.9
2.9
34, 36, 54
100% kill

(22 DAT)

IDT [1]
83, 84,
1
2.9
12
34, 36, 54
100% killed

IDT [2]
85, 86

2.9

(22 DAT)

IDT [3]
87, 88

2.9

IDT [4]
89, 90

2.9

IDT [1]
83, 84,
1
2.9
14
34, 36, 54
100% killed

IDT [2]
85, 86

2.9

(22 DAT)

IDT [3]
87, 88

2.9

IDT [4]
89, 90

2.9

IDT [5]
91, 92

2.9

IDT [1]
83, 84,
1
2.9
8.7
34, 36, 54
100% killed

IDT [3]
87, 88

2.9

(22 DAT)

IDT [4]
89, 90

2.9

IDT [1]
83, 84,
1
2.9
12
34, 36, 54
100% killed

IDT [3]
87, 88

2.9

(22 DAT)

IDT [4]
89, 90

2.9

IDT [5]
91, 92

2.9

IDT [5]
91, 92
1
0.29
0.29
33, 54, 55
71%

stunted

(18 DAT)

IDT [5]
91, 92
1
2.9
2.9
33, 54, 55
100% killed

(18 DAT)

IDT [1]
83, 84,
1
0.29
1.4
33, 54, 55
100% killed

IDT [2]
85, 86

0.29

(18 DAT)

IDT [3]
87, 88

0.29

IDT [4]
89, 90

0.29

IDT [5]
91, 92

0.29

IDT [1]
83, 84,
1
0.29
1.2
33, 54, 55
100% killed

IDT [2]
85, 86

0.29

(18 DAT)

IDT [3]
87, 88

0.29

IDT [4]
89, 90

0.29

IDT HP [1]
109
3
0.29
1.2
16, 33
100% killed

IDT HP [2]
110

0.29

(18 DAT)

IDT HP [3]
111

0.29

IDT HP 4]
112

0.29

IDT [1]
83, 84,
3
0.29
1.2
16, 33
100% killed

IDT [2]
85, 86

0.29

(18 DAT)

IDT [3]
87, 88

0.29

IDT [4]
89, 90

0.29

IDT [1]
83, 84,
3
0.29
0.87
16, 36
100% killed

IDT [3]
87, 88

0.29

(18 DAT)

IDT [4]
89, 90

0.29

IDT [1]
83, 84,
3
5.8
17
16, 36
100% killed

IDT [3]
87, 88

5.8

(18 DAT)

IDT [4]
89, 90

5.8

IDT [1]
83, 84,
3
29
87
16, 36
100% killed

IDT [3]
87, 88

29

(18 DAT)

IDT [4]
89, 90

29

IDT [1]
83, 84,
3
0.29
1.1
16, 36
100% killed

IDT [2]
85, 86

0.29

(18 DAT)

IDT [3]
87, 88

0.29

IDT [4]
89, 90

0.29

3′-OH [1]
101, 102
3
Not applicable
22-26 microliters
16
100% killed

3′-OH [2]
103, 104

(by volume)

(10 DAT)

3′-OH [3]
105, 106

3′-OH [4]
107, 108

IDT Blunt [1]
93, 94
3
0.29
1.1
16
75% killed

IDT Blunt [2]
95, 96

0.29

(10 DAT)

IDT Blunt [3]
97, 98

0.29

IDT Blunt [4]
99, 100

0.29

IDT Blunt [1]
93, 94
3
5.8
23
16
100% killed

IDT Blunt [2]
95, 96

5.8

(10 DAT)

IDT Blunt [3]
97, 98

5.8

IDT Blunt [4]
99, 100

5.8

IDT [1]
83, 84,
3
29
87
16
34% stunted

IDT [2]
85, 86

29

(14 DAT)

IDT [3]
87, 88

29

IDT [2]
85, 86
3
29
87
16
48% stunted

IDT [3]
87, 88

29

(14 DAT)

IDT [4]
89, 90

29

IDT [1]
83, 84,
3
29
87
16
25% stunted

IDT [2]
85, 86

29

(14 DAT)

IDT [4]
89, 90

29

IDT [1]
83, 84,
3
29
58
16
44% stunted

IDT [4]
89, 90

29

(14 DAT)

IDT [3]
87, 88
3
29
58
16
41% stunted

IDT [4]
89, 90

29

(14 DAT)

IDT [2]
85, 86
3
29
58
16
40% stunted

IDT [4]
89, 90

29

(14 DAT)

IDT [1]
83, 84
3
29
29
16
51% stunted

(13 DAT)

IDT [2]
85, 86
3
29
29
16
0% control

(13 DAT)

IDT [3]
87, 88
3
29
29
16
51% stunted

(13 DAT)

IDT [4]
89, 90
3
29
29
16
51% stunted

(13 DAT)

IDT [1]
83, 84,
3
29
116
16
75% killed

IDT [2]
85, 86

29

(13 DAT)

IDT [3]
87, 88

29

IDT [4]
89, 90

29

*where more than one copy number is listed, the treated plants were a mixture of copy numbers

**DAT = days after treatment;

“0% control” means no difference between treated and control plants was observed;

stunting % is calculated as [100 − (average height of the test plants/average height of control plants) * 100]

Double-stranded 25-mer RNA polynucleotide sequences for suppression of the TIF gene in Amaranthus palmeri were designed as listed in Table 14.

TABLE 14

SEQ

ID

Name
Sequence
NO:

TIF_dsRNA1
antisense:
115

5′-UUUUCUAAUACCUCAUCCAAUGAAU-3′

sense:
116

5′-AUUCAUUGGAUGAGGUAUUAGAAAA-3′

TIF_dsRNA2
antisense:
117

5′-UAUCUGCUUGUAAGUUCGCCGUUUC-3′

sense:
118

5′-GAAACGGCGAACUUACAAGCAGAUA-3′

TIF_dsRNA3
antisense:
119

5′-GGAGACGGUUUAUUUACAUUUGUGC-3′

sense:
120

5′-GCACAAAUGUAAAUAAACCGUCUCC-3′

TIF_dsRNA4
antisense:
121

5′-UAUUUACAGGUUUACCAUUGGUUGA-3′

sense:
122

5′-UCAACCAAUGGUAAACCUGUAAAUA-3′

The TIF 25-mer dsRNA polynucleotides were tested on both high (112) copy and low (16) copy EPSPS glyphosate-resistant Palmer amaranth.

High-copy plants were treated with a mixture of 4 short EPSPS dsRNAs (short dsRNA-1, short dsRNA-3, short dsRNA-4, as described in Example 1 and IDT [5] (SEQ ID NOS:91-92 as described in Table 11) at 11.5 grams/acre and one individual TIF dsRNA at 5.8 grams/acre, or with each individual TIF 25-mer dsRNA at 5.8 grams/acre; polynucleotide solutions were formulated in 10 millimolar sodium phosphate buffer (pH 6.8) containing 2% ammonium sulfate and 1% SILWET L-77® brand surfactant. Thirty minutes after polynucleotide treatment, plants were either sprayed with glyphosate (1682 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide) or not.

Low-copy plants were treated with a mixture of 4 short EPSPS dsRNAs (short dsRNA-1, short dsRNA-3, short dsRNA-4, as described in Example 1, and IDT [5] (SEQ ID NOS:91-92 as described in Table 11)) at 0.23 grams/acre and one individual TIF dsRNA at 5.8 grams/acre, or with each individual TIF 25-mer dsRNA at 5.8 grams/acre; polynucleotide solutions were formulated in 10 millimolar sodium phosphate buffer (pH 6.8) containing 2% ammonium sulfate and 1% SILWET L-77® brand surfactant. Thirty minutes after polynucleotide treatment, plants were either sprayed with glyphosate (1682 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide) or not.

Results are depicted in FIGS. 31 and 32 and show that the TIF polynucleotides enhance the activity of the EPSPS polynucleotides and that the TIF polynucleotides have herbicidal activity on their own.

Example 27

Aspects of the invention include polynucleotide compositions and methods of use for potentiating the activity of a non-polynucleotide herbicide in a plant. For example, a polynucleotide composition designed to regulate an herbicide target gene, or an herbicide deactivation gene, or a stress response gene, or a combination of such target genes, is applied to a weed or to a volunteer plant, concurrently or followed or preceded by application of a non-polynucleotide herbicide (typically a conventional chemical herbicide), resulting in potentiation of the activity of the non-polynucleotide herbicide. The combination of a polynucleotide composition with a non-polynucleotide herbicide (e.g., a conventional chemical herbicide) provides a synergistic effect, i.e., the herbicidal effect of the combination is greater than the sum of the herbicidal effect of the polynucleotide composition and the herbicidal effect of the non-polynucleotide herbicide.

Examples of conventional chemical herbicides and their corresponding herbicide target genes are provided in Table 15.

TABLE 15

Herbicide examples
Target gene (herbicide target gene)

glyphosate
5-enolpyruvylshikimate-3-phosphate

synthase (EPSPS)

Lactofen, flumioxazin, etc
protoporphyrinogen oxidase (PPO)

Mesotrione, isoxaflutole
4-hydroxyphenyl-pyruvate-dioxygenase

(HPPD)

Quizalofop, clethodim
acetyl coenzyme A carboxylase (ACCase)

Norflurazone, clomazone
phytoene desaturase (PDS)

glufosinate
glutamine synthase (GS)

Rimsulfuron, chlorsulfuron
acetolactate synthase (ALS)

Atrazine, diuron,
D1 protein of photosystem II (PSII)

bromoxynil, metribuzin

Dinitroaniline,
tubulin

pendimethalin

Dichlobenil, isoxaben
Cellulose synthase

Examples of conventional chemical herbicides and their corresponding herbicide deactivation genes are provided in Table 16.

TABLE 16

Herbicide examples
Target gene (herbicide deactivation gene)

Acetochlor,
glutathione S-transferase (GST)

metolachlor

Many including SU
Mono-oxygenases including cytochromes P450

herbicides
(see, e.g., a cytochrome P450 for conferring

resistance to HPPD inhibitors, benzothia-

diazinones, sulfonylureas, and other classes

of herbicides, described in U.S. patent application

publication 2009/0011936)

Thiazopyr
esterases (e.g., esterases involved in

apoptosis or senescence)

2,4-D, metribuzin,
glucosyl transferases; malonyl transferases

Glyphosate, paraquat
Cellular compartmentation and sequestration

genes (e.g., ABC transporters)

Example 28

This example illustrates a method for inducing systemic regulation of a target endogenous gene in a growing plant including topically coating onto leaves of the growing plant polynucleotides having sequence essentially identical to, or essentially complementary to, a sequence of 18 or more contiguous nucleotides in either the target endogenous gene or messenger RNA transcribed from the target endogenous gene, whereby the polynucleotides permeate the interior of the growing plant and induce systemic regulation of the target endogenous gene.

Double-stranded RNA or anti-sense ssDNA polynucleotides were designed for the herbicide targeted genes 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS), phytoene desaturase (PDS), protoporphyrin IX oxygenase (PPO), phenylalanine ammonia lyase (PAL), hydroxyphenylpyruvate dioxygenase (HPPD), acetyl-coenzyme A carboxylase (ACCase), acetolactate synthase (ALS), and glutamine synthase (GS). For each herbicide targeted gene, a solution containing a mixture of 8 anti-sense ssDNA polynucleotides in 2% ammonium sulfate in 10 millimolar sodium phosphate buffer, pH 6.8, was applied at a rate of 2.32 g/acre following application of 0.5% SILWET L-77® brand surfactant spray (10 gallons/acre). The tested polynucleotides and resulting phenotype observations are listed in Table 17.

TABLE 17

SEQ

Size

ID

Gene
Name
(nt)
Sequence
NO:
Phenotype

EPSPS

(See sequences provided in working
—
Topical dsRNA

Examples 1, 9, 13, 14, 21, 26)

followed by

glyphosate killed

glyphosate-

resistant Palmer

(up to 60 copies

of EPSPS) within

7-10 days

PDS
PDS sense
185
GACGGAAACCCUCCAGAGAGGCUGU
123
Topical dsRNA

GCAUGCCUAUUGUUAAACACAUCGA

caused bleaching

GUCACUAGGUGGUGAAGUUAAACUU

and stunting

AACUCUCGUAUACAAAAGAUUCAGU

phenotype, and is

UGGACCAGAGUGGAAGCGUGAAGAG

systemic.

UUUUUUGCUAAAUAACGGGAGGGAA

AUACGAGGAGAUGCCUAUGUUUUUG

CCACCCCAGU

PDS anti-sense
185
ACUGGGGUGGCAAAAACAUAGGCAU
124

CUCCUCGUAUUUCCCUCCCGUUAUUU

AGCAAAAAACUCUUCACGCUUCCAC

UCUGGUCCAACUGAAUCUUUUGUAU

ACGAGAGUUAAGUUUAACUUCACCA

CCUAGUGACUCGAUGUGUUUAACAA

UAGGCAUGCACAGCCUCUCUGGAGG

GUUUCCGUC

PPO
PPO_OLIGO1
21
GTGATATTACCTCCAACACGAT
125
Topical anti-sense

PPO_OLIGO2
21
ATAGTAAGCACAGGATCGGAG
126
DNAs caused

PPO_OLIGO3
21
CTTTCAATCCACTGTCAACCG
127
stunting of plant

PPO_OLIGO4
21
ATCAAGCGTTCGAAGACCTCAT
128
growth.

PPO_OLIGO5
21
CAGCAATGGCGGTAGGTAACA
129

PPO_OLIGO6
21
GCAATTGCCCGAATCCTTTTA
130

PPO_OLIGO7
21
TAGCTCAATATCAAGGTCCTA
131

PPO_OLIGO8
21
TCATAAGCACCCTCTATACAC
132

PAL
PAL_OLIGO1
21
TTCTTAACCTCGTCGAGATG
133
Topical anti-sense

PAL_OLIGO2
21
ATACCCGAGTATCCTTGCAAA
134
DNAs caused

PAL_OLIGO3
21
TAGGGCCCACGGCCTTGGAGT
135
stunting of plant

PAL_OLIGO4
21
AGCGGATATAACCTCAGCTAG
136
growth.

PAL_OLIGO5
21
CTTCGTGGCCCAACGAATGAC
137

PAL_OLIGO6
21
CAAGCTCGGGTCCCTGCTTGC
138

PAL_OLIGO7
21
GGAAGGTAGATGACATGAGTT
139

PAL_OLIGO8
21
GATGGCATAGTTACCACTGTC
140

HPPD
HPPD_OLIGO1
21
TCCGTAGCTTACATACCGAAG
141
Topical anti-sense

HPPD_OLIGO2
21
TCCAAGTGAATAGGAGAAACA
142
DNAs caused

HPPD_OLIGO3
21
AGCAGCTTCTGCGTCTTCTAC
143
stunting of plant

HPPD_OLIGO4
21
ACAGCACGCACGCCAAGACCG
144
growth.

HPPD_OLIGO5
21
CGATGTAAGGAATTTGGTAAA
145

HPPD_OLIGO6
21
CGAGGGGATTGCAGCAGAAGA
146

HPPD_OLIGO7
21
GTAGGAGAATACGGTGAAGTA
147

HPPD_OLIGO8
21
GACCCCAAGAAAATCGTCTGC
148

ACCase
ACCA_OLIGO1
20
GTCTTACAAGGGTTCTCAA
149
Topical anti-sense

ACCA_OLIGO2
21
ATCTATGTTCACCTCCCTGTG
150
DNA caused

ACCA_OLIGO3
21
ATAAACCATTAGCTTTCCCGG
151
stunting of plant

ACCA_OLIGO4
21
TTTATTGGAACAAGCGGAGTT
152
growth.

ACCA_OLIGO5
21
TATAGCACCACTTCCCGATAG
153

ACCA_OLIGO6
21
GCACCACGAGGATCACAAGAA
154

ACCA_OLIGO7
21
CCACCCGAGAAACCTCTCCAA
155

ACCA_OLIGO8
21
CAGTCTTGACGAGTGATTCCT
156

ALS
ALS-OLIGO1
22
GTTCTTCAGGGCTAAATCGGGA
157
No significant

ALS-OLIGO2
22
GTTCAAGAGCTTCAACGAGAAC
158
phenotype

ALS-OLIGO3
22
ATACAAACTCCAACGCGTCCAG
159

ALS-OLIGO4
22
CTCTTGGAAAGCATCAGTACCA
160

ALS-OLIGO5
22
CTAGAAAGATACCCACCCAATT
161

ALS-OLIGO6
22
ACTAGAATTCAAACACCCACCC
162

ALS-OLIGO7
22
TTTCTGCTCATTCAACTCCTCC
163

ALS-OLIGO8
22
TATGTATGTGCCCGGTTAGCTT
164

GS
GS_OLIGO1
21
TCATATCCAAGCCAGATCCTC
165
No significant

(gluta-
GS_OLIGO2
21
TGCATCACACATCACCAAGAT
166
phenotype

mine
GS_OLIGO3
21
GTACTCCTGTTCAATGCCATA
167

synthase)
GS_OLIGO4
21
ATTGATACCAGCATAGAGACA
168

GS_OLIGO5
21
AGCAATTCTCTCTAGAATGTA
169

GS_OLIGO6
21
CATCATTCCTCATCGACTTAG
170

GS_OLIGO7
21
CTCTCGTTGCCCTCTCCATAA
171

GS_OLIGO8
21
CAACGCCCCAGGAGAAAGTTC
172

The herbicidal activity of ssDNA polynucleotides that target the enzymes 4-hydroxyphenylpyruvate (HPPD) and protoporphyrinogen oxidase (PPO), and a transcription initiation factor (TIF), and their effect on the herbicide activity when used in combination with the herbicides mesotrione, fomesafen, and atrazine in Palmer amaranth was investigated. The polynucleotides used in this experiment were 8 HPPD anti-sense ssDNA oligonucleotides (SEQ ID NOS:141-148), 8 PPO anti-sense oligonucleotides (SEQ ID NOS:125-132), and 8 TIF anti-sense ssDNA oligonucleotides (SEQ ID NOS:75-82, see Example 26).

Glyphosate-sensitive Palmer amaranth (Amaranthus palmeri) plants were grown in 4-inch square pots with Sun Gro® Redi-Earth seedling mix containing 3.5 kg/cubic meter Osmocote® 14-14-14 fertilizer in a greenhouse with 14 h photoperiod and a daytime temperature of 30 degrees Celsius and night temperature of 20 degrees Celsius. The plants were sub-irrigated as necessary.

Plants at 10 to 15 cm height were pre-treated manually with 40 microliters (4 fully expanded mature leaves were treated with 10 microliters of solution per leaf on each plant) of a buffer-surfactant solution (as a control; 0.5% SILWET L-77® brand surfactant and 2% ammonium sulfate), or a buffer-surfactant-ssDNA polynucleotide mixture of the anti-sense oligonucleotides targeting HPPD, PPO, or TIF. Some plants were left untreated and were used as controls. Twenty-four hours later, untreated plants, buffer-surfactant treated plants, and buffer-surfactant-ssDNA treated plants were treated using a track-sprayer equipped with a 9501E nozzle and calibrated to deliver 93 liters of solution per hectare with a HPPD inhibitor, mesotrione (4 pounds active ingredient per gallon;), or with a PPO inhibitor, fomesafen (2 pounds active ingredient per gallon), or with a Photosystem II inhibitor, atrazine (90% active ingredient) as indicated in Table 18. Crop oil concentrate (COC) at 1% was added to all herbicide treatments. A low rate of each herbicide (mesotrione: 13 g per acre, equivalent to ⅛× of the recommended field rate; fomesafen: 16 g per acre, equivalent to 1/22× of the recommended field rate; and atrazine: 170 g per acre, equivalent to ⅛× of the recommended field rate,) was used to be able to detect any improvement of herbicide activity by the oligonucleotide mixture.

TABLE 18

Rate (grams

Treatment

Active
per hectare of

number
Pre-treatment
Ingredient
active ingredient)

0
Buffer-surfactant
—

1
Untreated
Mesotrione
13

2
Buffer-surfactant
Mesotrione
13

3
Buffer-surfactant-ssDNA-

HPPD

4
Buffer-surfactant-ssDNA-
Mesotrione
13

HPPD

5
Untreated
Fomesafen
16

6
Buffer-surfactant
Fomesafen
16

7
Buffer-surfactant-ssDNA-

PPO

8
Buffer-surfactant-ssDNA-
Fomesafen
16

PPO

9
Untreated
Atrazine
170

10
Buffer-surfactant-ssDNA-

TIF

11
Buffer-surfactant-ssDNA-
Atrazine
170

TIF

Plant height was determined at four days after herbicide treatment. Data were collected from one experiment with four replications per treatment. Results (expressed as Palmer amaranth plant height as affected by the buffer-surfactant solution, ssDNA, and herbicide treatment combinations) are presented in Table 19 and FIG. 33. Plants treated with HPPD anti-sense ssDNA oligonucleotides, PPO anti-sense ssDNA oligonucleotides, and TIF anti-sense ssDNA oligonucleotides showed growth stunting, measuring 125, 153, and 115 mm, respectively, while the plants treated with buffer-surfactant (control) measured 185 mm (FIG. 33). Treatment with HPPD anti-sense ssDNA oligonucleotides, PPO anti-sense ssDNA oligonucleotides, and TIF anti-sense ssDNA oligonucleotides respectively caused a 32%, 18%, and 38% growth reduction relative to the buffer-surfactant control.

No major differences in plant height were observed between plants treated with buffer-surfactant followed by herbicide, and plants treated with herbicide only. The plants treated with HPPD anti-sense ssDNA oligonucleotides followed by mesotrione showed the greatest reduction in plant growth, measuring 100 mm, a 46% reduction compared to the buffer-surfactant treated plants. The plants treated with PPO anti-sense ssDNA oligonucleotides followed by fomesafen measured 126 mm, a 32% reduction compared to the buffer-surfactant treated plants. The plants treated with TIF anti-sense ssDNA oligonucleotides followed by atrazine measured 121 mm, a 34% reduction compared to the buffer-surfactant treated plants.

TABLE 19

Rate (grams

Treat-

per hectare
Plant
Stan-

ment
Pre-
Active
of active
height
dard

number
treatment
Ingredient
ingredient)
(mm)
Error

0
Buffer
—
—
185
15

1
Untreated
Mesotrione
13
180
18

2
Buffer
Mesotrione
13
179
18

3
ssDNA-HPPD

125
19

4
ssDNA-HPPD
Mesotrione
13
100
7

5
Untreated
Fomesafen
23
158
12

6
Buffer
Fomesafen
23
139
10

7
ssDNA-PPO

153
20

8
ssDNA-PPO
Fomesafen
23
126
6

9
Untreated
Atrazine
170
146
19

10
ssDNA-TIF

115
17

11
ssDNA-TIF
Atrazine
170
121
16

Example 29

This example illustrates tested sequences of double-stranded RNA polynucleotides designed for different essential genes to ascertain the effect of the tested sequence on observable phenotype. For each essential gene, a solution containing the dsRNA polynucleotide in 2% ammonium sulfate in 10 millimolar sodium phosphate buffer, pH 6.8, was applied to Palmer amaranth at a rate of 240 picomole per plant following application of 0.5% SILWET L-77® brand surfactant spray (10 gallons/acre). The tested polynucleotides and resulting phenotype observations are listed in Table 20.

TABLE 20

SEQ

Size

ID

Gene
Name
(nt)
Sequence
NO:
Phenotype

Translation
sense
160
UUCGAGUAAUGGGAAAUUGGAUAAUGUA
73
Topical dsRNA

initiation

GAGGAGAGGAAGAAGGUUAUUGAUUCAU

caused stunting of

factor (TIF)

UGGAUGAGGUAUUAGAAAAGGCCGAGAG

plant growth.

AUUAGAAACGGCGAACUUACAAGCAGAU

AAUAGAAAGGAUAGCACAAAUGUAAAUA

AACCGUCUCCGAGUGUAAGU

anti-
160
ACUUACACUCGGAGACGGUUUAUUUACA
74

sense

UUUGUGCUAUCCUUUCUAUUAUCUGCUU

GUAAGUUCGCCGUUUCUAAUCUCUCGGCC

UUUUCUAAUACCUCAUCCAAUGAAUCAA

UAACCUUCUUCCUCUCCUCUACAUUAUCC

AAUUUCCCAUUACUCGAA

DNA-
sense
168
GAUCACAAAUUUGCCGGUUUAUGAUCAA
113
Topical dsRNA

dependent

AUACGGAACAUAAGACAGAUACACUUGA

caused stunting of

ATPase

ACACCAUGAUUCGCAUUGGGGGUGUGGU

plant growth.

(ddATPase)

UACUCGUCGUUCUGGAGUAUUCCCUCAGU

UGAUGCAGGUGAAGUAUGACUGCAAUAA

AUGUGGGGCUAUCCUGGGUCCCUUUUU

anti-
168
AAAAAGGGACCCAGGAUAGCCCCACAUUU
114

sense

AUUGCAGUCAUACUUCACCUGCAUCAACU

GAGGGAAUACUCCAGAACGACGAGUAAC

CACACCCCCAAUGCGAAUCAUGGUGUUCA

AGUGUAUCUGUCUUAUGUUCCGUAUUUG

AUCAUAAACCGGCAAAUUUGUGAUC

Hydroxy-3-
sense
200
CUGAAGCUGGUGAAGGUGAAGAUGGACG
173
No significant

Methylbut-

AAUGAAAUCUGCGAUUGGAAUUGGGACC

phenotype.

2-enyl

CUUCUUCAGGAUGGCUUGGGAGAUACGA

diphophate

UCAGGGUGUCUCUAACAGAACCACCAGAA

synthase

GAGGAGAUAGACCCUUGCAGAAGGUUGG

(HMEDS)

CAAAUCUUGGAACAAAAGCAGCUGAAAU

UCAGCAAGGAGUGGCACCAUUUGAAG

anti-
200
CUUCAAAUGGUGCCACUCCUUGCUGAAUU
174

sense

UCAGCUGCUUUUGUUCCAAGAUUUGCCA

ACCUUCUGCAAGGGUCUAUCUCCUCUUCU

GGUGGUUCUGUUAGAGACACCCUGAUCG

UAUCUCCCAAGCCAUCCUGAAGAAGGGUC

CCAAUUCCAAUCGCAGAUUUCAUUCGUCC

AUCUUCACCUUCACCAGCUUCAG

Fertilization
sense
183
UCCCAUCAAAGUUCCCUACAAAAUAUGUG
175
No significant

independent

CAGUUUCCUAUCUUCCUUGCCGCCAUUCA

phenotype.

endosperm/

UACAAACUAUGUUGAUUGUACAAGGUGG

TF (FIE)

CUUGGUGAUUUUGUUCUUUCUAAGAGUG

UUGACAAUGAGAUUGUACUGUGGGAGCC

AAUUAUGAAGGAGCAAUCUCCUGGAGAG

GGUUCAGUUGACA

anti-
183
UGUCAACUGAACCCUCUCCAGGAGAUUGC
176

sense

UCCUUCAUAAUUGGCUCCCACAGUACAAU

CUCAUUGUCAACACUCUUAGAAAGAACA

AAAUCACCAAGCCACCUUGUACAAUCAAC

AUAGUUUGUAUGAAUGGCGGCAAGGAAG

AUAGGAAACUGCACAUAUUUUGUAGGGA

ACUUUGAUGGGA

26S
sense
143
UUGUGCUUAAAACAUCGACCAGACAGAC
177
No significant

proteasome

AAUAUUUCUUCCUGUUGUUGGACUAGUU

phenotype.

ATPase

GAUCCUGAUACGCUGAAACCUGGUGAUU

subunit

UAGUUGGUGUCAACAAAGAUAGUUAUCU

RPT5B

UAUCCUGGACACUCUGCCGUCGGAAUAUG

(RPTB)

AU

anti-
143
AUCAUAUUCCGACGGCAGAGUGUCCAGG
178

sense

AUAAGAUAACUAUCUUUGUUGACACCAA

CUAAAUCACCAGGUUUCAGCGUAUCAGG

AUCAACUAGUCCAACAACAGGAAGAAAU

AUUGUCUGUCUGGUCGAUGUUUUAAGCA

CAA

ligase 1
sense
159
CGCUGCAGUUGGUGAAGUAGAUCCCGGC
179
No significant

(LIG1)

AAGGGGAUUUCACUCCGGUUUCCACGUCU

phenotype.

GGUUCGUAUCCGAGAGGAUAAAUCUCCA

GAGGACGCCACAUCAUCUGAGCAGGUGGC

GGAUAUGUACAGAUCUCAAGCAAACAAU

CCACACCGCAAAAAGAG

anti-
159
CUCUUUUUGCGGUGUGGAUUGUUUGCUU
180

sense

GAGAUCUGUACAUAUCCGCCACCUGCUCA

GAUGAUGUGGCGUCCUCUGGAGAUUUAU

CCUCUCGGAUACGAACCAGACGUGGAAAC

CGGAGUGAAAUCCCCUUGCCGGGAUCUAC

UUCACCAACUGCAGCG

tRNA
sense
159
UAAAGAUGGCGGAAAAAUCGACUAUGAU
181
No significant

synthetase

AAAUUGAUUGACAAAUUCGGCUGUCAGC

phenotype.

(tS)

GACUUGAUUUAUCGCUCAUUCAGAGAAU

UGAGCGCAUCACUGCUCGUCCUGCUCAUG

UAUUUCUUCGCCGCAACGUUUUCUUCGCU

CACCGUGAUUUGAAUGA

anti-
159
UCAUUCAAAUCACGGUGAGCGAAGAAAA
182

sense

CGUUGCGGCGAAGAAAUACAUGAGCAGG

ACGAGCAGUGAUGCGCUCAAUUCUCUGA

AUGAGCGAUAAAUCAAGUCGCUGACAGC

CGAAUUUGUCAAUCAAUUUAUCAUAGUC

GAUUUUUCCGCCAUCUUUA

Ubiquitin
sense
150
UGAAGCUGAUGCUGAAGGAAAGGAUAUU
183
No significant

specific

GAUGCUAGUGAAGUAGUUCGCCCAAGGG

phenotype.

protease 14

UGCCAUUAGAAGCUUGCCUAGCUAGCUAC

(UBP)

UCAGCUCCGGAGGAGGUGAUGGACUUCU

ACAGCACUGCAUUGAAGGCAAAGGCAAC

UGCUACAAA

anti-
150
UUUGUAGCAGUUGCCUUUGCCUUCAAUG
184

sense

CAGUGCUGUAGAAGUCCAUCACCUCCUCC

GGAGCUGAGUAGCUAGCUAGGCAAGCUU

CUAAUGGCACCCUUGGGCGAACUACUUCA

CUAGCAUCAAUAUCCUUUCCUUCAGCAUC

AGCUUCA

Serine
sense
155
ACACCUGCCCUAACAUCUCGGGGUUUUCU
185
No significant

hydroxy-

CGAAGAAGAUUUUGUUAAAGUGGCCGAG

phenotype.

methiy-

UAUUUUGAUGCUGCUGUUAAGCUGGCUC

transferase 2

UAAAAAUCAAGGCUGACACAAAAGGAAC

(SHMT)

AAAGUUGAAGGACUUCGUUGCCACCUUG

CAGUCUGGUGUUUU

anti-
155
AAAACACCAGACUGCAAGGUGGCAACGA
186

sense

AGUCCUUCAACUUUGUUCCUUUUGUGUC

AGCCUUGAUUUUUAGAGCCAGCUUAACA

GCAGCAUCAAAAUACUCGGCCACUUUAAC

AAAAUCUUCUUCGAGAAAACCCCGAGAU

GUUAGGGCAGGUGU

Methionine-
sense
159
UGAACUACGAAGCAGGCAAAUUCUCCAA
187
No significant

tRNA

AAGUAAAGGCAUUGGAGUUUUUGGGAAU

phenotype.

ligase/

GACGCCAAGAAUUCUAAUAUACCUGUAG

synthase

AAGUGUGGAGAUACUAUCUGCUAACAAA

(MtS)

CAGGCCUGAGGUAUCAGACACAUUGUUC

ACUUGGGCGGAUCUUCAAG

anti-
159
CUUGAAGAUCCGCCCAAGUGAACAAUGU
188

sense

GUCUGAUACCUCAGGCCUGUUUGUUAGC

AGAUAGUAUCUCCACACUUCUACAGGUA

UAUUAGAAUUCUUGGCGUCAUUCCCAAA

AACUCCAAUGCCUUUACUUUUGGAGAAU

UUGCCUGCUUCGUAGUUCA

Example 30

This example illustrates polynucleotides which are designed to target a particular low sequence homology region and are useful e.g., for selecting a specific allele of a target gene or a gene of a specific species. Polynucleotides designed to target non-coding sequence are useful in regulating non-coding RNAs that are involved in gene regulations, e.g., regulating non-coding RNAs that are processed to siRNAs in an RNAi-regulated pathway. FIG. 34 depicts an alignment of the Nicotiana benthamiana PDS locus 1 promoter (SEQ ID NO:319) and PDS locus 2 promoter (SEQ ID NO:320); in the case of locus 1 which contains multiple transcription start sites, the promoter sequence used in this alignment is the one with the most 5′ transcription start site. The Nicotiana benthamiana PDS 1 and PDS2 genes were found to have low sequence homology in the promoter region but high sequence homology in the coding region.

Polynucleotides designed to target different parts of the PDS1 and PDS2 promoters are listed in Table 21.

TABLE 21

Poly-

SEQ

nucleo-

ID
position/

Mix
tide
promoter target
Sequence
NO.
dir

2
HL419
PDS promoter 1 motif
TCCCATCTCCCACATGGGTTACTG
189
590-567

target

2
HL420
PDS promoter 1 motif
CAGTAACCCATGTGGGAGATGGGA
190
567-590

target

2
HL421
PDS promoter 1 motif
GGCTGATGAAATTCAAGTGCTA
191
557-536

target

2
HL422
PDS promoter 1 motif
AAACTGAGCTTGGAAATAATC
192
517-497

target

2
HL423
PDS promoter 1 motif
GAACCCAAAATTGTCACTTTTT
193
448-427

target

3
HL424
PDS promoter 1 motif
ATGCACTTGTTTATACTCTTGTCA
194
403-438

target

3
HL425
PDS promoter 1 motif
ATTTATTAGTGTTCTAAAGAA
195
357-337

target

3
HL426
PDS promoter 1 motif
TGTAGTAGCTTATAAGATTAGCTT
196
287-264

target

3
HL427
PDS promoter 1 motif
GTTGTCCCTTTTATGGGTCTTT
197
240-183

target

3
HL428
PDS promoter 1 motif
CCCGTGCAATTTCTGGGAAGC
198
86-66

target

5
HL429
PDS promoter 2motif
ATTAGTTTTTTATACACGAAAGAT
199
1313-1336

target

5
HL430
PDS promoter 2motif
ATCTTTCGTGTATAAAAAACTAAT
200
1336-1313

target

5
HL431
PDS promoter 2motif
TTGGTGGTTTGGCCACTTCCGT
201
1291-1270

target

5
HL432
PDS promoter 2motif
TTTGTTTGCTATTTAGCTGGA
202
1256-1236

target

5
HL433
PDS promoter 2motif
CAATTTGCAGCAACTCGCACTGGA
203
1205-1182

target

6
HL434
PDS promoter 2motif
TCCCACCATTGGCTATTCCGAC
204
1156-1135

target

6
HL435
PDS promoter 2motif
CTGTCTCTCTTTTTAATTTCT
205
1105-1085

target

6
HL436
PDS promoter 2motif
CCACTTTGCACACATCTCCCACTT
206
1056-1033

target

6
HL437
PDS promoter 2motif
GAGGATCCACGTATAGTAGTAG
207
1016-995

target

6
HL438
PDS promoter 2motif
TTTAAATAAAGAAATTATTTA
208
889-869

target

1
HL439
PDS promoter1
TAATACGACTCACTATAGGGCTTGA
209

GTTTATAACGAAGCT

1
HL440
PDS promoter1
TAATACGACTCACTATAGGGCTTCT
210

AATTTTCAAGGACG

1
HL441
PDS promoter1
AGCTTCTAATTTTCAAGGACGATA
211
Antisense

1
HL442
PDS promoter1
GTCATGTGACTCCACTTTGATTTTG
212
Antisense

1
HL443
PDS promoter1
CTCAATTCCGATAAATTTAAGAAAT
213
Antisense

1
HL444
PDS promoter1
CGAAGCTATTGGACCGACCTAATTTC
214
Sense

1
HL445
PDS promoter1
GGAATTGAGGGCTTCCCAGAAATTGC
215
Sense

1
HL446
PDS promoter1
ATGACTTTTTGATTGGTGAAACTAA
216
Sense

4
HL447
PDS promoter2
TAATACGACTCACTATAGGTGGAACT
217
Sense

CCAACACACAAAAAATTTC

4
HL448
PDS promoter2
TAATACGACTCACTATAGGTTGAAAA
218
Antisense

ATAATCATAATTTTA

4
HL449
PDS promoter2
GCATAATATATTGATCCGGTAT
219
Antisense

4
HL450
PDS promoter2
CTGAAAGTTCATACATAGGTACTC
220
Antisense

4
HL451
PDS promoter2
GGTACTCCAATTTTCAGTATAT
221
Antisense

4
HL452
PDS promoter2
CTGAAAATTGGAGTACCTATGTAT
222
Sense

4
HL453
PDS promoter2
ATGTATGAACTTTCAGAATATTATACC
223
Sense

4
HL454
PDS promoter2
TACCGGATCAATATATTATGCT
224
Sense

Six different combinations of polynucleotides (1 nanomole/plant of each applied polynucleotide) as listed in Table 21 and illustrated in FIG. 35 were tested on 4-week-old Nicotiana benthamiana plants using a procedure similar to that described in Example 12. Polynucleotide solutions were prepared in 0.01% (v/v) SILWET L-77® brand surfactant and 2% (w/v) ammonium sulfate in 5 millimolar sodium phosphate, pH 6.8. Two fully expanded leaves per plant were dipped into 0.1% SILWET L-77® brand surfactant solution freshly made with ddH2O for a few seconds, and allowed to dry. About 30 minutes later, 20 microliters of polynucleotide solution was applied to each of the two pre-treated leaves. Positive control plants were similarly treated with a DNA oligonucleotide targeting a conserved segment of the coding region of PDS1 and PDS2; negative control plants were similarly treated with a DNA oligonucleotide designed to silence green fluorescent protein (GFP). All six combinations of polynucleotides designed to target the PDS 1 or PDS2 promoter regions induced systemic silencing in the treated plants as evidenced by bleaching. Treatment with either dsRNA or dsDNA polynucleotides of approximately 200 bp and targeting the PDS 1 or PDS2 promoter regions also induced systemic silencing in the treated plants as evidenced by bleaching.

The following additional genomic sequences (including promoter and transcribed intron and exon sequence) listed in Table 22 were identified for Amaranthus palmeri genes for use in designing polynucleotides for topical application:

TABLE 22

SEQ

Gene

ID

Name
Sequence
NO.

ACC1
TTCAAAATGAATTTAAAATTATATAAAAATCAATATGGA
225

CACAAGACCGGATATCAATCCGACCCGAAATAGTTGACT

TGAAATCAACCTGATGACCCGAATGAACACCTCTAGTTA

TCACTAACAAGGGTCAGATTGCGTACATCAAACCCCTCA

AATCCTGCTTAGGTGGGAGCTTGTCAATGGCTTAGGGGT

AACGGGAATGTGTGTGCTATGTACATTGTGCATCTATTC

TTATGCTTATTTATGTTGAGTTAGTTTTTTTTTTGGATC

AAATATAAAGAGCTTAACTTTTGTATTTTCTTGATGTGG

TGTAGTGGTGATGAAGATCAGGCTGAGAGAATCTAAATT

GGCCAAAATTCTGAGAGAACAAGAAGTGAGTTCAGCCCT

TCGTGCTGCTGGTGTTGGTGTGATTAGTTGCATCATACA

GAGAGATGAAGGGCGAACTCCGATGAGGCATTCATTCTA

TTGGTCAGCAGAAAAACAATATTATAGTGAGGAGCCTTT

ACTACGTCATTTGGAACCCCCTCTATCTATGTATCTCGA

GCTGGTACTAGTCTCTGAACCGATTGCCTTTCTTCTGCT

TTGTTATTTTGTGTGATATTTCGACTTAAGTCTAATTTA

CATCGTTTTGTACATTTGTTATC

ACC3
TTTTGCTTTTTTACTATTATTTCCTTCTTTTCAAGGATT
226

TGAGTTGTTTATTGCTGACTGCTTCCTATGTATTACCCA

TATGTCTCTGTATAGGCATTACGGGAGCTGTACCTACAT

CTAACTCCTATACAACGTGTGAATATTGCCCGGCATCCT

AATCGCCCCACTTTTCTTGACCACGTATTCAGCATCACA

GAAAAGGTTTCTGATTTATTATAATTTTTGTCATTTGTA

TTCACTCTTCAATAAAGTACATCCATTATCAATCTTTAC

GGAGGTTGTTCACACAACTTCTTGTTTCATTTTGCATAA

TTAGTTTGTGGAACTACATGGAGATCGTGCTGGTTATGA

TGACCCTGCTATAGTTACTGGCCTTGGTACGATAGATGG

TAGGCGTTATATGTTCATTGGTCATCAAAAGGGAAGAAA

TACGAAGGAAAATATTGCACGGAATTTCGGGATGCCTAC

TCCTCATGGGTAAATGCTTTACTATAATGTTTTACTTTA

ATTTAATTACCTATGTTATTTAGGATGAAAATGAATACT

TTTCTTATTACTATTACTTAGGTTCCTAATGCACAAAAA

CCGTAATTATTAATGTACCCTAATGGAATTAACACATGG

TAATTAAGCTCTCCGCTTTGTGTAATTAATCCAATTTTT

TAGAGAGTCAAATAGTTCAGGTTAAACTAGAGCTTTTCA

TACCCAAATAATAAAACCAAGGGTAAATTTCCAAAA

ACC4
ATGTGATCAATTAAAGAAAAAGTCTAATTATATGAGCCC
227

GTCTCACAGTGACGGAGCTATCATAGAGCCCATGGGGTC

ACGTGCCCTTCGGGGTTTTTAGAAAAAATTCAAAGTATA

CTTTTCTATTAATAAGAGTAAAAATGTAAAATTAATATT

AAACTCTTTTGATAATAAATACTCTCTCACTTTAGTAAT

TTTGTCTTATTTATTTATTTTATCTCATGTGTTTAATAA

GGTCAGTTGACTTATTTTGTTCCATTTTCTTTTATGGTA

TGCCGTATTTAAAATTTTAGCAAGTAAAGATAAAATAGT

TGTTAATCTTACAAATAAAACTCTATCGAAATTTCATCC

ATTAGTTAATGTCCCCAAAAAGTCCGAACTACAAATCGA

CCACTGTCATCACATGGTGAGATAGTCTCATATAAAACG

AGTTCAGTTATTAAAGGAAAATAGGAAACACGAAACAGT

TAATTTAGGCGGGGCCTATGTATTATCCAAATGTGATAC

TCCAGTCCACATTACTCAGTCCTTCCAATTGAACAGTTG

GCTTAATCTACCAAGCGCGTGGCCATAAATGCCTCTAAC

ACTTTTCAATCTCTCAGATAACTCTCACACCACTTATCA

TCACAATTCACAATTACTCTAATTCTTTTTATTCCTTTC

CATGTCGCTAATTTTCTACTGATTCAGGTTTTATTCTCA

GCTTTTATCAATTTTATTTCATGCTTTTTATGTCAATTT

CTTGTTTCGCATTTTGTCTTCCACTTGCTGTCTGTTTTA

TTAATCAATTTTGTATGATTGTTGGAATAATTGTATGTA

TTTTTCATGATTTTCCTCTTATGGAGGTTCATAATGTAT

TGCTAGATTTGTTTACTTTCAC

ACC5
AATTTGAGCGGGAAAATTTTAATATCATTAAATAGTCTT
228

TGCTTTAGTATATAGAATAGTTAAAATTAATAGTCAAAC

TTATTGTAATAGCATGCACTAATCTATAATAATCTTATC

CTGAAAGCTATAATAAAATTATAAAAAAATATATGTGAA

AAACTAATTTGAGCGGGAAAATTTTAACCAAGGGCTAAC

ACGTATCATTAAATAGTCTTTACTTTAGTATATAGAATG

ATAATTAACGATCATAAAACAAAATTGTCACTTTCAGTA

GCAAACTTACAAAATGAGCAGAGTACCTCATATCATAAA

ATTGCTTCTTTCTCATTTGTTGTGTTGCTCTCATTTTAG

GAGTTCATCGTTTATATCGTCGTCTTACCACTCAATCAC

TTTTAGATTTATTAGTAGCACTTCCTCAATCTACAGCAG

CAATTTCTACAGTTCAACAACCTC

ACC6
GGAAAATTTACCTAGAATAATCCAATTTATTCGTGATTT
229

TTCTACAAATTCCAACTTCAAGGGGTATTTGCCTAAAGT

AATTAAACTTGGATACCCCGATGACCTGCTATAGTAGAT

AATTTACCAGAAAATTAAAAATGAAAATTAATTTAAAAT

TAGAGAAAAATTTTGAAATTTCATATAAAAAATTTTAAA

TAATAAAAAAAATATAAATTTTTTTGAACATTTTATTTT

AATCTATCTTTTTTGAAAAAATAAAACTTAGTTATAGCA

AGTGATCTGGTCACCGGGTTTACTCTAGGAAAATATCCC

TCAAAGTTGAGATTATTCATGGTTAATAAATAGGTGAGA

TTATTATAGAAAAATTACGAATAAATTGGATTATTGTTG

GTAATTTTTTTTTCAAAACTATCCCTAGGAAGGACCTTA

TTAGTGATTCTCCCTCTACTTTGGAGGAGTATATTGTGG

ACTTCCCATCTTCCTTAATTGTATTGTAACTTTTAACTA

TTGATTCTTTAAAAAAAAGAACTTATAAAATTGTAGGGT

TAATAAAATCTAAGATTTTATCTAATTTCACTTTGATTA

TTCCGATTTTGTATTCACATTATTTTAAATGACATTCGT

CAAATAAAAAAAAATAGTTTCATTGCATTCCAATTTTGT

TGACTAGGGGGATTAAAGAAAGAATAGTATCAATAATCG

TAATGTAGCAAGTAGTACAAAAGAAGTATATTTCAATAT

GTCAAACTTTGATCTCGTTGTAACTTGTAATTTGTACGA

TGCGGTGTGAATGACATACTTCACCTTTTTCATTATTTT

ATACTGGTAGTGACATGGGATTATTATTGCGATATTTGC

AGTAATGAAAATTTTTTTGGTTGTTGCTTTTACAAACAA

AAATTCTACCGAATTTTTTATTAATTTAATTCAACACGT

TGGTGTTACCCATGATTTATAGGTCTGGGTCCGCCACTG

CTAGCTAACATTAAACAATTTAACAAACTCAATACACCA

ACCTAAAAATAAAATTTTTTTGGCCATAATTTTTAGAAT

TTTAGTTTTTAAACATTATATTTGGGAATTTTTTTTCCT

TTTATATATATAAAATAAAAAAAAATCCAAAAAAGGGGA

CACACATTAATACACACTTGAAAGCATCGATGATATCGA

AGAAAAACCAGATGGGGTGCCCAATTATCTTCGTCTCCT

TCGATATTATCGAATTCATTAACAACATTATATCAAAAA

CCAACCAAATTACCAACTTTCGAAACCAATATTCGCCGT

ATTTTTCTCTATTCAACAATCCCTACAATGGCGGCATTG

CCAGCTTCTTCTTCTCCTGCAATTTCGGAATCACCCACT

TGCAATTTTCTTCCTATTCAAAAAATCACTACCACTCGC

TTTCTAAGGTTTCATTCGGTTTTACTCCCAAGCCTAAAT

TTGGCCTTTTCTCCAAGGTTTATTTTCTATCTCTTTTTT

AATTGGTTAATCAATTGGATTGTTGAATTTTTCAGGGTT

TAACGGTATAATATTTGTGGGTTTTTTCGAGTACATTCT

GGGTTTGTAGTATTGGATTTGGCATTGCTTTTAATTTTT

GAGATTGGGTTTTTTGGGTTTTATTTGGTTCTTGTGATT

CAAGGTTATTGATTTGCTGCATTAAACTGTATTTATGGA

ATGATGTCAATTAACTGTTACATTACATTGCTTTATGGT

TTTCATCATGCTGATTAGTGATTACTGTGTTTGAATCTC

TTGCTTCTCTATGTACTATTTAATCTGATACAACAAGTA

CAACCTAGAAAACAGGTTAAAGGGAAATCTATAAGCTTA

GTAAATTAACACTTGAAAGAAGCTAATGACGGAGAGAGG

GGTCTTTTTGGAGAAGGCAGTTTTCATATTATTGCTCAG

TTCTCTAGTGCAGCTTTACTTCACTTAGACACTCTTAAG

TAGAGGTCATAGGTGTTCAGAATAGATCCAAAGACCCGA

TATTTACCGGACTTTGTAAACAACTTAACCCGACTTCAA

AATGAATTTACAATCATATAAAAGCAATATGGACTTAAA

CCGATTTTGAACCGACCTTGACCGGTTGATCCGAATGAA

TGCCTCTACTCTTAAGCATGTCAACTGTAATATGAAATA

GAATTATAATATAAACTAAGTTCATGTTTTCTTCAACTA

CAAATGAAATTTTATGACCCAAATAATGTGTGAATACCC

CCAGCAATAGGTTGAATGGCATTTAGTTCAGTTGATTTT

AGCAGACCACATCTGCCCTCATATTCCATTGTTCAGTTT

AGTTGTTAGTAGCTGTACATAATAGACTAATTAAGTTGT

CATTTTGATCCATGTTATGGTTGTCTGGGATAAACGGAT

TGGAATTGTATAATAAAAGTTTGGGTTAGTTTATTTTGC

TCTAGGAGGGGTTATGTCATATGTGCACTCTGTTGGCAA

CCCGACAATGCAAAACATTTTCATACTTGGTACGTTGTT

GCGTGTTTTGTGCCCTTCGTATTTTGTAACTGTTGATGA

ATGTGTAAAAATATACTACATGATCATATGCTAGTAGGT

CTTCTTCACCTAGTAAAGAAATTTTTCTAACACGAGAAG

TTCAAAACATATTCCCATTACCATTATCCAACATCAGTA

CCCGAGTCCAAGTAACATAGGGTGTCCCTTTATGATAGT

ATAAGAATTGGTGCATGAAAAACGCGTGATTGTAGCGAG

GATAGTAGGCGGGAGAGGTACAGGATTTGAAAATTTTGA

ATTGCTAAAACGCTATCAGGATCTTGTTTTTCTTACTTT

GATGTTGCTTTTTTGAAATTTGATCCAAATTGTTAAATT

ATTGAGACTAATTCCTGTTGATCCTGTCGTGAACTTTGT

AGAATCTTTCAGGCCGCATTCTCACAGTGAAGGCTCAAT

TAAACAAGGTGAGTCTTTTTTTGTCTTAACTCTTATGCA

GTTCATTATCTCTTCTACTGATGAGAAAACCACTATTTG

GCCTAATTCTAATTTCCTTCTAGGTTGCTTTGGATGGTT

CAAATCATGCTCCATCACCTTCGCACGAAAAATCTGGGC

TACCAGCCCAAGAAAAGAAGAACGATGAGCCGTCTAGTG

AATCTTCTCCTGCAGCATCAGTGTCTGAAGAACGAGTCT

CCGAATTCTTGAGCCAAGTTGCCGGTCTTGTCAAGTATG

TAACATTCTTTATTTTCATTCTTCCACACACTCGCAATT

TGGATAACGAGATGTCTTTAGAGACGTCTGGGGAACAAG

GGAGAAATGAGTCTAGAGGTTGCTAGAGAGAACGAGATA

AATACTAATATATATGAATATTTCATAATCCACATTAAA

AAAATACAATTGAATTTGCATTATGGTGAACTACCAAAG

AATCGAATATTTTTTAATACTCCATGTTTTGTGGTCTAG

ACTTGTGGATTCTAGAGACATTGTAGAGTTGCAATTAAA

ACAACTGGACTGTGAGATATTGATCCGCAAGCAGGAAGC

TATTCCTCAACCACAAATTCCTAATCCTACACATGTCGT

TGCAATGCAACCACCACCACCTGCTGTAGCGTCTGCCCC

AGCTCCCGTCTCTTCACCAGCCACTCCTCGTCCTGCGTT

ACCTGCCCCAGCGCCTGCTGCCACGTCAGCTAAGCCATC

ACTTCCACCTCTCAAGAGCCCTATGTCAGGCACATTCTA

CCGTAGTCCAGCTCCTGGCGAGCCGCCTTTCGTGAAGGT

AAGTGTATACCCCTTTTTTAGTGTTGTATTTCTGTGTTA

TATCAATTTTTGCATTTTGTGAAGCTGAAAATAAATCTT

TCATTTTCCATAGGTTGGAGATAAAGTTAAGAAAGGACA

AGTCATATGCATTATCGAGGCTATGAAGTTGATGAATGA

AATCGAGGTACGTATGTTATTGCTTTAAACTTCATGCCT

TAGGCCGTGAAGTT

ALS1
ACAAAAAGCACAAATTCAATAATATACTCTTTAAGTTTG
230

TTTATCTTCTAATTAGTTCGGTTAAAACGGTTCCCCACT

TTCTTCTCCGACTCTCACAATTATCTTCCCCTATTCATT

TTTCTTCCACCCTCTCTAATGGCGGCTGTTTCCTTCAAT

ATCAATGGTGGAAAGATTGGAACTTTATGTTCAAGACAC

GAATTCGTTTGTGGGTTTGTAAGAAAATTTCATTTTAGA

ACTCATACTTCTATATTTGAAAAACATATGCCAAAAACT

TCAAGGTTTAAAGCAATGGAAGTTTCTGCAAATGCAACA

GTAAATATAGTTCCTGTTTCAGCTCATTCTAGGTAATTT

TATTTCTCGAAAATTTCCGATTTACAATTAAATTAATCT

TGTTTTGTAGGTAATGAATTGCAGAAGAAATAGATGGAT

TCTTATTTGTTTATTGGTATTTGTTTATAAATTTTTGTT

TATATTAGTTTCTGAATTGTGATTATTCTGATTGTATGT

CAAGGTTTAGGTTGTTATTAATAAATGTAAATTGGATTG

ATTGAAGTTGCAATAAGGTGATGGCGTGATGCTGATTGT

TGTAAATTTT

ALS2
CAACAATGAGAATTTAGAATCCATATCAATCTTGATATT
231

CAAGGGTATTTAAGTAATTAAAGAACAACCATTGTTAAG

CGCCTCCACTATCTTCTTCCTTCTCATTCTCCATTCTCG

CTTAGCTTTCCTCTCGCACTAATTACCTCCATTTGCAAC

CTTTCAAGCTTTCAACAATGGCGTCCACTTCTTCAAACC

CACCATTTTCCTCTTTTACTAAACCTAACAAAATCCCTA

ATCTGCAATCATCCATTTACGCTATCCCTTTGTCCAATT

CTCTTAAACCCACTTCTTCTTCTTCAATCCTCCGCCGCC

CCCTTCAAATCTCATCATCTTCTTCTCAATCACCTAAAC

CTAAACCTCCTTCCGCTACTATAACTCAATCACCTTCAT

CTCTCACCGATGATAAACCCTCTTCTTTTGTTTCCCGAT

TTAGCCCTGAAGAACCCAGAAAAGGTTGCGATGTTCTCG

TTGAAGCTCTTGAACGTGAAGGTGTTACCGATGTTTTTG

CTTACCCTGGTGGAGCATCCATGGAAATCCATCAAGCTC

TTACTCGTTCTAATATCATTAGAAATGTTCTTCCTCGAC

ATGAACAAGGTGGGGTTTTCGCTGCTGAAGGCTACGCTC

GTGCTACTGGACGCGTTGGAGTTTGTATTGCCACTTCTG

GTCC

EPSPS1
ATTTGGATAACTTTTTCCTTTGATTCGAATCGGATTATT
232

TTTAATACAGTATTATGAACTGATTTAATGAAAGTGGAG

GAAGTTTCAATTTTTAAAGTTGTAGGTGTAATGTTTTCT

CATTTTGGATATGAAAGTGGAGGAAGTTTCAATTTCGAA

TCATGTTTGCCAGTTGATTCAATGAATGCTCTTGGAAAT

GACCAAGAGTTCAAGGCTTCTTGTTATAAAACATTTCAA

TTTTGATCTAAGAATGAACTATTTAGAACTTAAAGTAAT

TAAATTATTAGTTATAACTTATAAAAAAATTCAATTTTA

ACCTTAAATTTATAAATTATGACCTTAAAAAGATCAAGT

ATTGAACGCATATTTAGAAAAATTATAATTCGGCTTATC

AGTCTCATATTGAGACGGTCTCGTCCAAGACAAGTTGTA

TCATTTATATAATCAAATATAATTATGAGTGTATTCATG

TAGGTTTCAACTTTAAAGCCTAGGTGAAAGATATGTTGT

AGCATCTTTGTGAAAGTCAGCCTATAACTTGGTTCTAAA

ATTTTGAAGCATAACCATATAGTCCCTCGAATTCATTCA

AGTTGTCCAATTTACTTTTTTATACTTGCCGAGACAACA

TTTAAACCCTTAATATTTCTAATTAATCTTAATTAAAAA

TTATGAAAATTTGATATTAATAATCTTTGTATTGAAACG

AATTTAACAAGATCTCACATGACTATGTTTTAACTTATA

GATTAAAAAAAAATACAAATTAAGAGTGATAAGTGAATA

GTGCCCCAAAACAAATGGGACAACTTAGATGAATTGGAG

GTAATATTAGGTAGCAAGTGATCACTTTAACATCAAAAT

TGATCACTTATAGGTTCAAATTGAAACTTTTACTTTAAT

TGATATGTTTAAATACTACTTTAAATTGAAATTGATATT

TTTAAGGTCAAAATTGAAACCTTTAAGATTATAATTGAA

AATTGGCAGAAGAAAAACAAAGAGAAAGAATATAAGACA

CGCAAATTGTACCGATCTACTCTTATTTCAATTTGAGAC

GGTCTCGCCCAAGACTAGATGTTCGGTCATCCTACACCA

ACCCCAAAAAATTCAACAACAAAGTCTTATAATGATTCC

CTCTAATCTACTACAGTCTACACCAACCCACTTTCTCTT

TGCCCACCAAAACTTTGGTTTGGTAAGAACTAAGCCCTC

TTCTTTCCCTTCTCTCTCTCTTAAAAGCCTGAAAAATCC

ACCTAACTTTTTTTTAAGCCAACAAACAACGCCAAATTC

AGAGAAAGAATAATGGCTCAAGCTACTACCATCAACAAT

GGTGTCCAAACTGGTCAATTGCACCATACTTTACCCAAA

TCCCAGTTACCCAAATCTTCAAAAACTCTTAATTTTGGA

TCAAACTTGAGAATTTCTCCAAAGTTCATGTCTTTAACC

AATAAAAAAGAGTTGGTGGGCAATCATTCAATTGTTCCC

AAGATTCAAGCTTCTGTTGCTGCTGCAGCTGAGAAACCT

TCATCTGTCCCAGAAATTGTGTTACAACCCATCAAAGAG

ATCTCTGGTACTGTTCAATTGCCTGGGTCAAAGTCTTTA

TCCAATCGAATCCTTCTTTTAGCTGCTTTGTCTGAGGTA

TTTATTTCTCAACTGCGAAAACAATCTCTATTTGATATT

GGAATTTATATTACATACTCCATCTTGTTGTAATTGCAT

TAGTAGATACTTATGTTTTGACCTTTGTTCATTTGTTTG

TTGAATTGGTAGTGTTGAGAATTTGAATGTAATTATTTG

TTTTTCCATGTGAATTTAATCTGATTAAATCCACTTCTT

ATTTATGTTAAGTTGCAATGATGTTTGCCAAATGGTTAT

CATTGAAGGATAAGTTTGCCTACTTTTGACCCTCCCAAC

TTCGCGGTGGTAGAGCCATTTTATGTTATTGGGGGAAAT

TAGAAAGATTTATTTGTTTTGCCTTTCGAAATAGTAGCG

TTCGTGATTCTGATTTGGGTGTCTTTATAGATATGATAT

ATGGGTTATTCATGTAATGTGTAGGTTTATGCATTATGT

TGGATGCATGTCTGGTGTTATTGCTGTAAATGGATGAAT

GTTGTTATTTGGAGACATTTTTTCATTCATTTTTTCCCT

TTTTAATTGGAACTGGAAGAGGGAAAGTTATTGGGAGTA

ATTAAAAGGTTGTGAGTTCGATACACTGCATCAAAGACG

AAGAACTTGACATAGATGTTGAAGGCTAATCCTTATCAC

TGCTTGAATTCAATATGTATCTGAAAATTTTACCCCTCT

ATATGCATCTGTTTTTGCTAATAAAGTGTTTTTGGACTA

TCATGTTTTGTGATGCTTAAGAGGGTGATATTACTGAGA

TAAATGGAAATATCAAAATAACATCTATTGTGAAGT

EPSPS2
CAAGCTTCAATTATCGTTTTCAAAATAAGTATTTCAAAG
233

TCTATAAAGATATTGTATAAGTTTTAGTTCAAATTTAAT

AAGTTTTTTTTTTTTTTTTTTTTTTTTTTTTGAAAATCC

AAATTGAATAAGTTAATARTTAAATTATGACATATAATT

ATGACATATAATTTGACCATGATATTTTACAATCTAACT

TAATTTTGAACTTATTATTTCTAATATTCAATTATCGTT

CTAAAAATAAGTATTTAAATTGTATAGATATATTGTATA

ACATTTAGTTCAAATTTAATTATTGATAGTTTTATTGAC

TATTTATTTGGKGTTTGAAATTCATCCATAGAATGATAG

AATAACACCATTTTTTATATAACTTCGTTCTAAAATTTT

GAAGCATAACCATATACTCCCTCCAATTCATCCAAGTTG

TCCAATTTACTTTTTCATACTTGCCGAGGCAACATTTAA

ACCCTTAATATTTCTAATTAATGTTAATTAAAAATTATG

AAAATTTGATATTAATAATCCTTGTATTGAAACAAATCT

AACAAGATCCCACATGACTATGTTTTAACTTATAGATTA

AGAATAAAATACAAATTAAGAGTAATAAGTGAATAGTGT

CCCAAAACAAATAGGACAACTTGGATGAATTGGAGGTAG

TATTAGGTAGCAAGTGATCACTTTAACATCAAAATTGAT

CAGTTACAGGTTCAAATTGAAACTTTTACTTTAATTGAT

ATGTTTAAATACTACTTTAAATTGAAATTGATATTCTTA

AGGTCAAAATTGAAAACTTTAAGATTATAATTGAAAAAT

GCCCAGAAGATGAAAAAACAGAGAGAAAGCATGTAAGAC

ACGCAAATTGAACCAGTCTACTCTTGTTTCAATTTGAGA

CGGTCTCGCCCAAGACCAGATGTTCAGTCATCCTACACC

AACCCCAAAAAATTCAACAACAAACTCTTATAATGATTC

CCTCTAATCTACTAGAGTCTACACCAACCCACTTTCTCT

TTGCCCACCAAAACTTTGGTTTGGTGAGAACTAAGCCCT

CTTCTTTCCCTTCTCTCTCTTAAAAGCCTAAAACCCACC

AACTTTTTCAGCCAAGAAACAACGCGAAATTCAGAGGAA

GAATAATGGCTCAAGCTACTACCATCAACAATGGTGTCC

ATACTGGTCAATTGCACCATACTTTACCCAAAACCCAGT

TACCCAAATCTTCAAAAACTCTTAATTTTGGATCAAACT

TGAGAATTTCTCCAAAGTTCATGTCTTTAACCAATAAAA

GAGTTGGTGGGCAATCATCAATTGTTCCCAAGATTCAAG

CTTCTGTTGCTGCTGCAGCTGAGAAACCTTCATCTGTCC

CAGAAATTGTGTTACAACCCATCAAAGAGATCTCTGGTA

CTGTTCAATTGCCTGGGTCAAAGTCTTTATCCAATCGAA

TCCTTCTTTTAGCTGCTTTGTCTGAGGGCACAACAGTGG

TCGACAACTTGCTGTATAGTGATGATATTCTTTATATGT

TGGACGCTCTCAGAACTCTTGGTTTAAAAGTGGAGGATG

ATAGTACAGCCAAAAGGGCAGTCGTAGAGGGTTGTGGTG

GTCTGTTTCCTGTTGGTAAAGATGGAAAGGAAGAGATTC

AACTTTTCCTTGGTAATGCAGGAACAGCGATGCGCCCAT

TGACAGCTGCGGTTGCCGTTGCTGGAGGAAATTCAAGTT

ATGTGCTTGATGGAGTACCAAGAATGAGGGAGCGCCCCA

TTGGGGATCTGGTAGCAGGTCTAAAGCAACTTGGTTCAG

ATGTAGATTGTTTTCTTGGCACAAATTGCCCTCCTGTTC

GGGTCAATGCTAAAGGAGGCCTTCCAGGGGGCAAGGTCA

AGCTCTCTGGATCGGTTAGTAGCCAATATTTAACTGCAC

TTCTCATGGCTACTCCTTTGGGTCTTGGAGACGTGGAGA

TTGAGATAGTTGATAAATTGATTTCTGTACCGTATGTTG

AAATGACAATAAAGTTGATGGAACGCTTTGGAGTATCCG

TAGAACATAGTGATAGTTGGGACAGGTTCTACATTCGAG

GTGGTCAGAAATACAAATCTCCTGGAAAGGCATATGTTG

AGGGTGATGCTTCAAGTGCTAGCTACTTCCTAGCCGGAG

CCGCCGTCACTGGTGGGACTGTCACTGTCAAGGGTTGTG

GAACAAGCAGTTTACAGGTATAATGTTAACCCTTACCCT

TCACATTGTTCTGCTAAATTCTAGAGGACCCTTTCAATT

CTGGGTGGGATAAGCACGGCAATTTGACCGCAAAAAAAT

TGCAAAATTATTCTGCTGATAGAACATCTCGAGATGAGA

TCATATTGAGTTTTGGCGTCAACATAAACCTAATCAAAT

AATGAAAAATACAAACATCATATGGTTTCTTTTGTCTTT

ATGACTAGACACTCTCTATTATTCCTTGATTGGGATCTT

AATTTGAATTGCTGTGTAGCCTACACCTCATGTTCAGAT

TTTGTTCGTATACCAGACTTTTCTTGATTGGGATCTTAT

TTGTCCCCTGGATTTTGCATAGGGTGATGTAAAATTTGC

CGAAGTTCTTGAGAAGATGGGTTGCAAGGTCACCTGGAC

AGAGAATAGTGTAACTGTTACTGGACCACCCAGGGATTC

ATCTGGAAAGAAACATCTGCGTGCTATCGACGTCAACAT

GAACAAAATGCCAGATGTTGCTATGACTCTTGCAGTTGT

TGCCTTGTATGCAGATGGGCCCACCGCCATCAGAGATGT

GGCTAGCTGGAGAGTGAAGGAAACCGAACGGATGATTGC

CATTTGCACAGAACTGAGAAAGCTTGGGGCAACAGTTGA

GGAAGGATCTGATTACTGTGTGATCACTCCGCCTGAAAA

GCTAAACCCCACCGCCATTGAAACTTATGACGATCACCG

AATGGCCATGGCATTCTCTCTTGCTGCCTGTGCAGATGT

TCCCGTCACTATCCTTGATCCGGGATGCACCCGTAAAAC

CTTCCCGGACTACTTTGATGTTTTAGAAAAGTTCGCCAA

GCATTGA

GS3
TCTTAATTTGTATTTTATTATTAATCTATAAGTTAAAAC
234

ATAGTCAAGTGAGATCTTGTTTGATTCGTCTCTATGCAA

GGATTTTCATATCAACTTTTCATAATTTTTGATTATACA

CAATTACAAATATTAACGAACGAATAAGTGCATTAAAAA

GAGTGCAAAAAGCAAATGGGACACTTGTGTTGAATAGGA

GGGAGTATACATTAAGATGAATCTAACGAGATCTCACAT

GGATATAATTTGTCTTCTATATATGTCTAAAAAATCTTG

ATCAAATTTCTCTTTCCAAAATAGAATATTCTAAATGGG

AAGAACATTAAGAAACGGAGGGAGTACTTATAAGTTAAG

ATAGTTGGGGGTATTTAGGTAAAAAAATCTATGCCAAAA

GTAGAAAGTGGACAATTAGAGTGACTTTACTAAATAAGG

AAAGTGGACATTTAAAATGAATCGGAGGGAGCATATTAA

CTTTATTTTCAAAGTGTGAAACATAATCATATTTAGGTA

AAAAAATTATCAATTTAACGTCAAAATTGATCACAAATA

GGTTAAAATTGAAATTTTTTATGTTAATTGATCTATTGT

TCACTTTAAATTGAAATTGATATCCTTTAAGGTTAAAAT

TAATACCTCTAAAATTAAAATTATTAAAGGCCCAGAAAA

TAAAAAAAAAAGAAGACAGGCTATTAGTAAAATTATTAA

GTATGTAAGGTTGATACACGCGCGAATTGAGCCGGCCCA

CTTTTAGTTTCAATTTGAAACAGTCTCAATCAAGACCAA

TTATTTATTATTTTATTATTTTATTGTTTTAAGCTCAAT

GGGTTGGACTTGATAAATTATATTTTGAGGAGACGGGCT

ATTAGTAAAATTAATAGTTGGAATCTTTTTTGATATACT

ATAAAAAGAGGTATCTGGTGGAGCCTTAAATCTGCGCAA

TTGAAGTCCTCAATACACATCTCGCTCTTCTTATTCTCT

TTCATCTATTTCCTCCTTTGATCAAACTACGCCATGTCT

CTCTTAAATGATCTCGTTAACCTTAATCTCTCTGAAACT

CCGATAAGATTATCGCTGAATACATATGGTAATACAACA

ATCCTTCCTCTTTTTCATTT

GS5
AAAAAACCGTCTTATTTGTAGAAAATAAAAAACTAAAAA
235

GTAGTATCAACTTTTAGACTAGTCATAAGTGAGTGGCAT

CAAACTTGTTCTATAAAAAGGGAAGAGTTCCTCAACTTG

AGATTCATATTTTTTGTGATTTCTAAATAGAAGAACATA

CTCATCTTCCACTTCTCTTATTCATCAAATTTTATTTGT

TCCCCAAAAAAACATGTCTCTTCTTACAGATCTCATCAA

TCTTAATCTTTCTGACTCCACTGAGAAGATCATTGCTGA

ATACATATGGTCAGTTTTCATCCCTTTTTTTTACCTTTA

ATCCCACTTTTTGTTTTTACCCACCATTTTTTTCATCTA

TTTTCTCTTAAAGATTTTAACTTTTTACTTTTTTGTGTA

TATAACATTCATTTTTTCAATTGGGTAGGTTAGAAAATT

TCTATAAATAAATAAATAAATNNNNNNNNNTACCTTAAT

CCCACTTTTTGTTTCTACCCACCATTTTTTTCATCAATT

TTTCTTAAAGATTTTAACTTTTTTTAACTTTTTCTTGGT

TTTTGTGTATATACCAATCATTTATTTTCACTAGTGTAG

GTTAAAAAATATCTAAAAATAAATAAAATAGAATAAAAA

TGTAATCACTAGATTAACCCATGAATTATTTCCCTTGTT

TTTACTCAAACTTTTTACCCTTGTTAAAAAAATAATGAT

ATAAATAAATTTTTGAGGGTTTGTTAAACCCATATGTAA

TCTATATCGAAAAAATTAGATAGCGGGTTTTGTTGTGGA

CAAACTAAATAACAAATTTAGGAATAAACTTTTGAGGGT

TTATTGAAAAAATAACCCATATTTAATCTATATCGAAAA

AATGATAGCGAGCTTTGTATAGAT

HPPD
CGTCGAAGTAGAAGACGCGGAAGCTGCTTTTAACATCAG
236

CGTTTCGCATGGGGCTATTCCCTGTGTTTCTCCTATTCA

ATTGGAAAACGGTGTCGTTTTATCTGAGGTTCATTTATA

TGGGGATGTTGTGCTTCGGTATGTAAGCTACGGAAATGA

ATGTGGGGATGTGTTTTTTCTTCCTGGGTTTGAGGAAAT

GCCGGAGGAATCATCGTTTAGAGGACTTGATTTTGGCAT

TCGAAGGTTGGATCATGCTGTAGGGAATGTCCCTGAGTT

GGCTCCTGCAATTGCTTATTTGAAGAAGTTTACTGGGTT

TCATGAGTTTGCTGAGTTTACAGCTGAAGATGTTGGGAC

GAGTGAAAGTGGATTGAATTCAGCCGTATTGGCAAACAA

TGATGAAATGGTGTTGTTTCCGATGAATGAACCTGTGTA

TGGGACAAAAAGGAAGAGCCAAATTCAAACTTATTTGGA

GCATAATGAAGGGGCTGGTGTACAGCATTTGGCTTTGAT

GAGTGAAGACATATTTTGGACTTTAAGGGAGATGAGGAA

GAGAAGTGTTCTTGGTGGGTTTGAGTTTATGCCGTCGCC

GCCTCCGACTTATTACCGGAATTTGAGGAACAGAGCTGC

TGATGTATTGAGTGAGGAGCAGATGAAGGAGTGTGAAGA

GTTGGGGATTTTGGTGGATAAAGATGATCAGGGCACTTT

GCTTCAAATCTTCACCAAACCTATTGGAGACAGGTAAAT

TTTAATCTTGCTTTCAATTGCTTTTGCTTGATGGATTGA

CTAGCAAATTTGATCGCATTTTGTTGCTTATATGACTTG

ATGATACTTCCTCTGTTTCGAAATACTCGCTACATTCGC

TACATTTTGTTTTGTGCACTATTCATCGTTCAAGCTTAT

TTTACATATTGCGACTAATGTGTAACTAAAAATATAGTC

AAGTGGGATCTTGTTTGAATCGTCTAATGGCATACTTTC

ATCATATTAAATTTTTATAATTTTTAGATTAGTGTAGTT

TAAGATATTAATGCTCAAAATTGTGCATTGGATTGCGTA

AAAAAGTGAAATGTAGCAAGTATTATGAAA

PDS
AAAACCAAAGGAAATAAGTTATAGGTAGGAAAAATTGTT
237

ATTGAAGTTAATGTAGTAAACTAGTAACTTAAACTGTGA

TACCCCGGATTTAGCTTAAAAAGAGATTGATAGACTACT

CATATCAACAAGGTGCATCTTCTTTTCTAGGGAGCCCAT

TTGCTAAGAACTCTACAGTTAAGCGTGCTTGGTGGGGAG

CAATCTTAGGATGGGTGACCTCCTGGGAAGTTTTCCTGG

GTGCGCACGGGTGAGGCCAAAGTGCGTTAAAAAGACTTG

TGTTGGTCTGTGGGGCTTGTCTACAGTCTCCATGAGTAG

TCACCGGCGGTACGAGAGGCCGGGGTGTTACATAAACAG

ACTCAAAGGCGCTAAGCCAAGTAGCCAATAGCAACATGT

GTGGCCTGCGGACAGTCACAAAAACACACAATTTCTTAT

TTTTACTCTCTTTTATCTCTTTTAGGCTTTAGCCATCAA

CAATAAAACAACATGATAAAGCAATTCATTTACTGCTAA

ATTCCAACAATTTGGTCCCTTTTTCCTGTTCTTTCAGTT

TCACATACCCTCTTATCAATCTATATCCAAAACTATTTC

ATTTTCCAAACTCTTTTAAACCCAAAAATCAAAACTTTT

GATTGAAGAACAAACTTTGGGGGTTTTGGAAAATGAGTC

ATTTTGGATATGCTTGTGCTACTCAATCCACATCAAGAT

ATGTTCTTTTAGGAAATTCAAATAACCCCACTTCAATTT

CATCTATTGGAAGTGATTTTTTGGGTCATTCTGTGAGAA

ATTTCAGT

PPOX
TGGTACCTACCCTGTTTACATTTTCAATTTCCCCCTTTT
238

TTCTCTACTACTCCTACTTTATTGATTCTTATCCATGTG

TGTTCTATGGGAATTGACATTAATTGTTCAGGTGTGTAT

GCTGGTGATCCTTCTAAGTTGAGTATGAAAGCTGCATTT

GGAAAGGTCTGGACCTTAGAGCAAAAGGGTGGTAGTATC

ATTGCCGGTACACTCAAAACTATTCAGGAAAGGAAGAAT

AATCCTCCACCGCCTCGAGACCCGTCCGTAATCACCATT

ACTCATTGCTTTCCTTCACCTTGTATCTTACCTTAATAT

ACATGTATTTAATTGATAATGTCACATTGCCTCATTTGC

AGCCGCCTTCCTAAACCTAAGGGCCAGACTGTTGGATCC

TTTAGGAAAGGGCTCATTATGTTACCTACCGCCATTGCT

GCTAGGTATCTTTTGACTCTCAAATCTTAAATATTTCTC

ATCTTCTCCTTCTGCTAATACTAGTATGTTTACCATCTT

TTTATTTTTTTAGGCTTGGCAGTAAAGTCAAACTATCGT

GGACACTTTCTAATATTGATAAGTCGCTCAATGGTGAAT

ACAATCTCACTTATCAAACACCCGATGGACCGGTTTCTG

TTAGGACCAAAGCGGTTGTCATGACTGTCCCTTCATACA

TTGCAAGTAGCCTGCTTCGTCCGCTCTCAGTGAGTATCA

TTCTTTCCTTCATTTCTTTTCGTTTATTGTTGTCCAATG

TCTTGTTAAACACCAGTTTGGCCTTGTGCTCGTGAATTA

TGGCTACAATGTTAACTGATTCAGGCACTGTGGGAGATG

CCTAAGTTTCTAAAACCTCTGCGCATAATGTTTGTTTGG

ATGTTAGGAATTGCATTGAAAAATTGCTTTTGTGATGTT

GATGTTAATACCAATTACAAGTGTGTTCTTCAACTTCTG

CAATACCTTGTTCGAGTGAGCTTGAGGGGGTTTAGATTA

GTGTCCAATGTGAAACTAGCAAATGAACTCCAAGCGCTG

GGATAGGTCCTTGGGATGGAGCCCCTGATACCCAAGACA

GAAACTGGGTGGTTGTATTCAAACCCTCTAAGTAGAGTG

AGAGATCAAGGAAACCTCAAATCGTAAAAAATGAATACA

GTGTCATGATTGCTAATCTTATCACAAATCGTAAAAAAT

GAATTATGGTCGATTTTGGACTATTTTTGGGTCATTTTG

AGTGAATCTCGAACTTAAAAAGCGAGTCTTCTAGCAGTT

CTTGTTACAGCGGGGCATACATAGGTAGGAATTTGGTTT

TTTACTATTTGAGCCTTTTGACTGTTGTGGCCGGTAATA

TGGAATAGTCTAGCACTTCTGCGTGTGTACAACTAGTAT

TTGTAATTATGTGATCGCACTTAACTCTCAGATAAAACC

TTATTAAGCACTAACATTTTGTTTTGGTTGAAGGAATCA

GGAGGAAAGAAAATTGAGGGATTTGTTGGTATATAGATT

CCTTTGTTTGGATAACAAAATTGGAGTGGAGAGATTTGG

AAGGAAGAATTTTATAGGGATTAGTTCCCATTACACTTA

TGTTGATTACAAAATTTCTCCAAAAGTGGAAAGATTTTG

AGTGAAAATGTTTTTTATTTCTCTTCCTCTCCCTTTCTT

TCCCTCTTAAACAAACAAGGAAAGTTAATCTTATCATTC

CGTACCTTCCCCTTCTGTTCTTTTTTTTCTCTCCAAAAT

TCTTATCCTAACGTAGTGTTATTGTCACTGTCTTATGAA

CGAGAATTCTTTTCTTCCTAATACTGCTTGTGTTGCACA

GTCAATGATTTAGCTAGATCATCTTTGGTTAGCTACTCA

AAATATTTACATAAAATACTTGTAGAAATAAATACCAAT

AGGTCTTGTCAAGAAGTAGTTTCAATGCTATAAGTTTTA

ACCAATCCTCAAAATTTACACCATGGAGATATCTGCGGA

TAAGAACTAGTAACTGTAGCAGCTGTAACTGTTGCAATC

AGTTTTATGGTTTGCCTTGCAAATCAAACTTTGGATGTT

GTTTGCCTTACAATTTGTTACTATTACGTGAAGTTTAGT

GTTCGCCCTTCACATTGTACTTTGGTTTTTGTTTTCCTT

GCAATTTGCTCTTTGAAGTATAAAGTGCTGAGTGCTGAG

TGCTGAGTGCTGACCTTTCCTGCTCAGGATGTTGCTGCA

GATTCTCTTTCTCAATTTTACTATCCACCAGTCGCAGCA

GTGTCCCTTTCTTATCCCAAAGAAGCAATTAGACCAGAA

TGCTTGATCGATGGAGAACTAAAAGGATTCGGGCAATTG

CATCCTCGCAGCCAGGGTGTGGAAACCTTGGGTATATGC

TCCCATTCAACTATATCTCAATTTTTATGAGTATTTTTC

TTTCTCTGAATTATTCAATTTGGTGACGTTAAATTTTGA

TTGTACTCGACAGGAACAATTTATAGTTCATCTCTTTTC

CCTGGTCGAGCACCACCTGGTAGGACCTTGATCTTGAGC

TACATTGGAGGTGCTACAAATGTTGGCATATTACAAAAG

GCAAGTCATTTATACAATTATATCTGTTGTATCCTCAAA

TAAGTGGGTATCAATCCTGACGACATGCTTGCTTGTATC

GATGCAGAGTGAAGATGA

Example 31

This example illustrates a polynucleotide sequence that regulates gene expression in more than one plant species. Two highly conserved regions in EPSPS sequences from different weed species were identified and shown as the “Region 1” and “Region 2” sequences in Table 23.

TABLE 23

SEQ

SEQ

Species/gene or

ID

ID

consensus sequence
Region 1
NO:
Region 2
NO:

Euphorbia_heterophylla_1Contig1
AGTTTACAGGGAGATG
239
TCGATGTGAACATGAACAAAA
251

TAAAGTT

TGCCAGATGTCGCTATGACATT

GGCTGTGGTTG

Euphorbia_heterophylla_2Contig1
AGTTTGCAGGGAGATG
240
TCGATGTGAATATGAACAAAAT
252

TGAAATT

GCCAGATGTTGCTATGACATTA

GCTGTGGTTGC

Ambrosia_trifida_1Contig1
AGTTTACAGGGGGATG
241
TCGATGTTAACATGAACAAAAT
253

TAAAGTT

GCCAGATGTTGCCATGACGCTT

GCAGTCGTTGC

velvetleaf_1Contig1
AGTTTGCAGGGTGATG
242
TTGATGTCAACATGAACAAAAT
254

TAAAATT

GCCAGATGTTGCCATGACTCTC

GCTGTTGTTGC

Xanthium_strumarium_2Contig1
AGTTTGCAGGGTGATG
243
TTGATGTCAACATGAACAAAAT
255

TGAAATT

GCCTGATGTCGCAATGACTCTT

GCTGTGGTTGC

Ipomoea_hederacea_1Contig_1
AGTTTACAGGGGGATG
244
TTGATGTCAACATGAACAAAAT
256

TTAAGTT

GCCAGATGTTGCCATGACTCTT

GCTGTAGTTGC

Chenopodium_album_1Contig1
AGTTTACAGGGTGATG
245
TTGATGTCAACATGAACAAAAT
257

TAAAATT

GCCAGATGTCGCAATGACTCTT

GCTGTTGTTGC

Digitaria_sanguinalis_1Contig1
AGTTTGCAGGGTGATG
246
TTGACGTCAACATGAACAAAAT
258

TGAAATT

GCCTGATGTCGCAATGACTCTT

GCTGTGGTTGC

Senna_obtusifolia_1Contig3
AGTTTACAGGGAGATG
247
TTGATGTCAACATGAACAAGAT
259

TAAAATT

GCCAGATGTTGCCATGACGCTT

GCTGTAGTTGC

Waterhemp_EPSPS
AGTTTACAGGGTGATG
248
TCGACGTCAACATGAATAAAAT
260

TAAAATT

GCCAGATGTTGCTATGACTCTT

GCAGTTGTTGC

Palmer_EPSPS
AGTTTACAGGGTGATG
249
TCGACGTCAACATGAACAAAA
261

TAAAATT

TGCCAGATGTTGCTATGACTCT

TGCAGTTGTTGC

palmer_1Contig1
AGTTTACAGGGTGATG
250
TCGACGTCAACATGAACAAAA
262

TAAAATT

TGCCAGATGTTGCTATGACTCT

TGCAGTTGTTGC

Table 24 lists 21-, 22-, 24-, 35-, 45-, and 55-mer dsRNA polynucleotide sequences designed based on the EPSPS consensus sequence for region 2, TNGANGTcAAcATGAAcAAaATGCCaGATGTNGCNATGACNcTtGCNGTNGTTGC (SEQ ID NO:263).

TABLE 24

SEQ

ID

Name
Sequence
NO:

Consensus_21mer
Sense:
264

dsRNA
AACAUGAACAAAAUGCCAGAU

Anti-sense:
265

AUCUGGCAUUUUGUUCAUGUU

Consensus_22mer
Sense:
266

dsRNA
AACAUGAACAAAAUGCCAGAUG

Anti-sense:
267

CAUCUGGCAUUUUGUUCAUGUU

Consensus_24mer
Sense:
268

dsRNA
CAACAUGAACAAAAUGCCAGAUGU

Anti-sense:
269

ACAUCUGGCAUUUUGUUCAUGUUG

Consensus_35mer
Sense:
270

dsRNA
UCGACGUCAACAUGAACAAAAUGCCAG

AUGUUGCU

Anti-sense:
271

AGCAACAUCUGGCAUUUUGUUCAUGUU

GACGUCGA

Consensus_45mer
Sense:
272

dsRNA
UCGACGUCAACAUGAACAAAAUGCCAG

AUGUUGCUAUGACUCUUG

Anti-sense:
273

CAAGAGUCAUAGCAACAUCUGGCAUUU

UGUUCAUGUUGACGUCGA

Consensus_55mer
Sense:
274

dsRNA
UCGACGUCAACAUGAACAAAAUGCCAGA

UGUUGCUAUGACUCUUGCAGUUGUUGC

Anti-sense:
275

GCAACAACUGCAAGAGUCAUAGCAACAU

CUGGCAUUUUGUUCAUGUUGACGUCGA

The EPSPS consensus dsRNA polynucleotides were synthesized by in vitro transcription and topically applied as crude RNA preparations. Glyphosate-resistant weeds (16-copy Palmer amaranth and horseweed) were treated with the six individual (21-, 22-, 24-, 35-, 45-, 55-mer) consensus dsRNAs; non-glyphosate-resistant weeds (waterhemp, sicklepod, crabgrass, morning glory, lambsquarter, Euphorbia) were treated with the three individual shorter (21-, 22-, 24-mer) consensus dsRNAs. Following polynucleotide treatment glyphosate-resistant plants were treated with glyphosate (1682 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide) and non-glyphosate-resistant plants were treated with glyphosate (105 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide). At 7 days after treatment all six EPSPS region 2 consensus dsRNA polynucleotides were found to give 100% control (killed plants) of glyphosate-resistant Palmer amaranth; control Palmer amaranth plants treated with glyphosate alone were not killed. At 7 days after treatment, the three shorter (21-, 22-, 24-mer) EPSPS region 2 consensus dsRNA polynucleotides tested individually were found to give 95%, 80% and 65% control (combining killed and injured plants), respectively, of waterhemp; waterhemp plants treated with glyphosate alone gave about 40% control (combining killed and injured plants); and a mixture of all three shorter (21-, 22-, 24-mer) consensus dsRNA polynucleotides gave about the same control as glyphosate alone. The EPSPS region 2 consensus dsRNA polynucleotides did not cause an observable effect on the other weed species (horseweed, sicklepod, crabgrass, morning glory, lambsquarter, euphorbia) tested.

Example 32

This example illustrates use of a topical polynucleotide treatment for transiently silencing a gene in a plant to effect a desired phenotype. Silencing polyphenol oxidase in plant tissues inhibits browning of cut or damaged plant tissues, a valuable trait for fruits and vegetables where resistance to browning is a desirable trait.

Anti-sense DNA oligonucleotides with the sequences shown in Table 25 were designed to target three polyphenol oxidase genes (PPO1, PPO2, and PPO3) from lettuce; the underlined text indicates T7 sequence that was included in the anti-sense polynucleotides.

TABLE 25

Anti-

sense

SEQ

oligo-

ID

nucleotide
Sequence (5′-3′)
NO.
Length

HH07

TAATACGACTCACTATAGGGCTTTA
276
45

TTGAATTTAGCTATGTAATC

HH09

TAATACGACTCACTATAGGGTTTAT
277
41

CAACCAAATGTGCAGC

HH11

TAATACGACTCACTATAGGGTTGTC
278

TGTACATAATTGTGAGATTTGTGG

49

Three-week old lettuce plants (variety SVR3603 L4) were treated as follows. Two source leaves (leaves that are older and are ˜60% of their mature size) on each plant were pre-treated with 0.1% (v/v) SILWET L-77® brand surfactant and allowed to dry (˜15 minutes). To each leaf 20 microliters of a mixture of the polyphenol oxidase anti-sense polynucleotides in a solution of 0.01% (v/v) SILWET L-77® brand surfactant and 2% (w/v) ammonium sulfate in 5 millimolar sodium phosphate, pH 6.8, were applied as small droplets; each plant was treated with 6.7 nanomoles of each of the three polynucleotides HH07, HH09, and HH11 (for a total of 20 nanomoles per plant). Control plants were treated either with an unrelated polynucleotide HH02-05 (anti-sense to phytoene desaturase) or with buffer (0.01% (v/v) SILWET L-77® brand surfactant and 2% (w/v) ammonium sulfate in 5 millimolar sodium phosphate, pH 6.8) alone.

Approximately 3 weeks after the topical polynucleotide treatment, “untreated” lettuce leaves (i.e., not those treated with the topical polynucleotides) were cut from the lettuce head under water and incubated in a cup with 1.33 millimolar methyl jasmonate in 5% ethanol. Leaves were inspected for central rib browning and photographed every 24 hours. Samples were taken from the remaining plants and frozen for small RNA and mRNA analysis

Plants treated with the polyphenol oxidase anti-sense polynucleotides HH07, HH09, and HH11 showed significant reduction in central rib browning after treatment with methyl jasmonate. Plants treated with HH02-05 (anti-sense to phytoene desaturase) as a control showed a small reduction in central rib browning compared to the buffer-treated control.

Example 33

This example illustrates an herbicidal composition adapted for topical coating onto the exterior surface of a growing plant comprising surfactant and at least one plant lethal agent, the improvement wherein the plant lethal agent includes polynucleotides having a sequence essentially identical or complementary to sequence of a plant gene or sequence of the plant gene's transcribed RNA, the polynucleotides effecting systemic suppression of the plant gene. More specifically this example illustrates an herbicidal composition adapted for topical coating onto the exterior surface of a growing plant comprising surfactant and at least one plant lethal agent, the improvement wherein the plant lethal agent includes polynucleotides effecting suppression of the endogenous phytoene desaturase (PDS), 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS), or ribulose-1,5-bisphosphate carboxylase oxygenase (RuBisCO) genes from Nicotiana benthamiana. This example also illustrates the use of topically applied polynucleotides to suppress a very highly expressed gene (ribulose-1,5-bisphosphate carboxylase oxygenase) in a plant.

An anti-sense polynucleotide with the sequence CATCTCCTTTAATTGTACTGC (SEQ ID NO:34) was designed for the endogenous Nicotiana benthamiana phytoene desaturase (PDS) gene, which has the cDNA sequence fragments ATGCCCCAAATCGGACTTGTATCTGCTGTTAATTTGAGAGTCCAAGGTAATTCAGCTTATCTTTGGAGC TCGAGGTCTTCGTTGGGAACTGAAAGTCAAGATGTTTGCTTGCAAAGGAATTTGTTATGTTTTGGTAGT AGCGACTCCATGGGGCATAAGTTAAGGATTCGTACTCCAAGTGCCACGACCCGAAGATTGACAAAGG ACTTTAATCCTTTAAAGGTAGTCTGCATTGATTATCCAAGACCAGAGCTAGACAATACAGTTAACTATT TGGAGGCGGCGTTATTATCATCATCGTTTCGTACTTCCTCACGCCCAACTAAACCATTGGAGATTGTTA TTGCTGGTGCAGGTTTGGGTGGTTTGTCTACAGCAAAATATCTGGCAGATGCTGGTCACAAACCGATA TTGCTGGAGGCAAGAGATGTCCTAGGTGGGAAGGTAGCTGCATGGAAAGATGATGATGGAGATTGGT ACGAGACTGGGTTGCACATATTCTTTGGGGCTTACCCAAATATGCAGAACCTGTTTGGAGAACTAGGG ATTGATGATCGGTTGCAGTGGAAGGAACATTCAATGATATTTGCGATGCCTAACAAGCCAGGGGAGTT CAGCCGCTTTGATTTTCCTGAAGCTCTTCCTGCGCCATTAAATGGAATTTTGGCCATACTAAAGAACAA CGAAATGCTTACGTGGCCCGAGAAAGTCAAATTTGCTATTGGACTCTTGCCAGCAATGCTTGGAGGGC AATCTTATGTTGAAGCTCAAGACGGTTTAAGTGTTAAGGACTGGATGAGAAAGCAAGGTGTGCCTGAT AGGGTGACAGATGAGGTGTTCATTGCCATGTCAAAGGCACTTAACTTCATAAACCCTGACGAGCTTTC GATGCAGTGCATTTTGATTGCTTTGAACAGATTTCTTCAGGAGAAACATGGTTCAAAAATGGCCTTTTT AGATGGTAACCCTCCTGAGAGACTTTGCATGCCGATTGTGGAACATATTGAGTCAAAAGGTGGCCAAG TCAGACTAAACTCACGAATAAAAAAGATCGAGCTGAATGAGGATGGAAGTGTCAAATGTTTTATACTG AATAATGGCAGTACAATTAAAGGAGATGCTTTTGTGTTTGCCACTCCAGTGGATATCTTGAAGCTTCTT TTGCCTGAAGACTGGAAAGAGATCCCATATTTCCAAAAGTTGGAGAAGCTAGTGGGAGTTCCTGTGAT AAATGTCCATATATGGTTTGACAGAAAACTGAAGAACACATCTGATAATCTGCTCTTCAGCAGAAGCC CGTTGCTCAGTGTGTACGCTGACATGTCTGTTACATGTAAGGAATATTACAACCCCAATCAGTCTATGT TGGAATTGGTATTTGCACCCGCAGAAGAGTGGATAAATCGTAGTGACTCAGAAATTATTGATGCTACA ATGAAGGAACTAGCGAAGCTTTTCCCTGATGAAATTTCGGCAGATCAGAGCAAAGCAAAAATATTGA AGTATCATGTTGTCAAAACCCCAAGGTCTGTTTATAAAACTGTGCCAGGTTGTGAACCCTGTCGGCCCT TGCAAAGATCCCCTATAGAGGGTTTTTATTTAGCTGGTGACTACACGAAACAGAAGTACTTGGCTTCA ATGGAAGGTGCTGTCTTATCAGGAAAGCTTTGTGCACAAGCTATTGTACAGGATTACGAGTTACTTCTT GGCCGGAGCCAGAAGATGTTGGCAGAAGCAAGCGTAGTTAGCATAGTGAACTAA (SEQ ID NO:38). Anti-sense polynucleotides with the sequences CTGTGATCATCATATGTATCA (SEQ ID NO:279), CCTTAACTCTCCAGCTAGCAA (SEQ ID NO:280), CAGCCCGCAAATGTTTCATTC (SEQ ID NO:281), GCCGTCAATGGCCGCATTGCT (SEQ ID NO:282), TCCTTCCCTCAGAAAGGGCAG (SEQ ID NO:283), and TTGCCTCATGCTGCTAATCTG (SEQ ID NO:284) were designed for the endogenous Nicotiana benthamiana 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) gene, based on the Nicotiana benthamiana EPSPS cDNA sequence CTTATATGTGCTTAAGCCTAACGTGCACCCGGCCCCTTAACCCCAGCAGTTTTCAATCTACCTACCGTC TCTACCATTTTCTTCTAGTTGGTGAAAATTTCTAACTTTGAGAAAACAAGCCAAAGTTTTTGTTTCTAA GAACGCAAAATGAGTGAAATTTTTTGCAGCAATGGCACAGATTAGCAGCATGAGGCAAGGGATACAG ACCCCTAATCTTAATTCCTATTTTCCTAAAACCCAAAAGGTTCCTCTTTTTTCGCATTCTATCTTCTTTG GATCAAAGAAAATAACCCAAAATTCAGCAAAATCTTTGTGGGTGTGTAAGAAAGATTCAGTTTTGAGG GTGGCAAAGTCACCTTTTAGGATTTGTGCATCAGTGGCCACTGCACAGAAGCCCAACGAGATTGTGCT GCAACCCATCAAAGATATATCAGGCACTGTTAAATTGCCTGGTTCTAAATCCCTTTCCAACCGTATTCT CCTTCTTGCTGCCCTTTCTGAGGGAAGGACTGTTGTTGACAATTTACTGAGTAGTGATGACATTCATTA CATGCTTGGTGCGTTGAAAACACTTGGACTTCATGTAGAAGATGACAATGAAAACCAACGAGCAATTG TGGAAGGTTGTGGTGGGCAGTTTCCTGTCGGCGAGAAGTCTGAGGAAGAAATCCAACTATTCCTTGGA AATGCAGGAACAGCAATGCGGCCATTGACGGCAGCAGTTACTGTAGCTGGAGGACATTCAAGATATG TACTTGATGGAGTTCCTAGGATGAGAGAGAGACCGAT (SEQ ID NO:285), CACTGACGTTGGATTAGAGGTAGGCTCCTTATATGTGCTTAAGCCTAACGTGCAGCCGGCCCCCAACC CCAGCAGTTTTCAATCTACCTACCGTCTCTACCATTTTCTTATAGTAGTTGAAAATTTCTAACTTTGAGA AAACAAGCCAAAGTTTTGTTTCTAAGAACACAAAGGGAGTGAAATTTTTTGCAGCAATGGCACAGATT AGCAGCATGAGGCAAGGGATACAGACCCCTAATCTTAATTCCTATTTTCCTAAAACCCAAAAGGTTCC TCTTTTTTCGCATTCTATCTTCATTGGATCAAAGAAAATAACCCAAAATTCAGCAAAATCTTTGTGGGT GTGTAAGAAAGATTCAGTTTTGAGGGTGGCAAAGTCACCTTTTAGGATTTGTGCATCAGTGGCCACTG CACAGAAGCCTAACGAGATTGTGCTGCAACCTATCAAAGATATATCAGGCACTGTTAAATTACCTGGT TCTAAATCCCTTTCCAATCGTATTCTCCTTCTTGCTGCCCTTTCTGAGGGAAGGACTGTTGTTGACAATT TACTGAGTAGTGATGACATTCATTACATGCTTGGTGCATTGAAAACACTTGGACTTCATGTAGAAGAT GACAATGAAAACCAACGAGCAATCGTAGAAGGTTGTGGTGGGCAGTTTCCTGTCGGCAAGAAGTCTG AGGAAGAAATCCAACTATTCCTTGGAAATGCAGGAACAGCAATGCGGCCATTGACGGCAGCAGTTAC TGTAGCTGGTGGACATTCTAGATATGTACTTGATGGAGTTCCTAGGAT (SEQ ID NO:286), and AAATTCTTGGTTCGAGGAGGTCAGAAGTACAAGTCTCCTGGAAAAGCATATGTTGAAGGAGATGCCTC AAGTGCTAGCTACTTTTTGGCGGGTGCAGCTGTCACAGGTGGAACTGTCACTGTTGAAGGTTGTGGAA CAAGCAGTTTACAGGGGGATGTTAAGTTTGCTGAGGTCCTCGAAAAGATGGGGGCAGAAGTTACATG GACAGAGAACAGTGTCACGGTTAAAGGACCTCCAAGGAACTCTTCTGGAATGAAACATTTGCGGGCTG TTGACGTTAACATGAACAAAATGCCAGATGTTGCCATGACTCTTGCTGTAGTTGCACTTTTTGCTGATA GTCCTACTGCCATAAGAGATGTTGCTAGCTGGAGAGTTAAGGAAACTGAGCGGATGATTGCCATATGC ACAGAACTTAGGAAGTTGGGTGCAACAGTTGTAGAAGGGCCAGACTACTGCATAATCACTCCACCTGA AAAGTTAAAAGTAGCGGAAATTGATACATATGATGATCACAGAATGGCCATGGCTTTCTCTCTTGCGG CTTGTGCTGATGTTCCAGTCACCATTAAGGACCCCGGTTGTACTCGCAAAACCTTCCCCAACTACTTTG ACGTTCTCCAGCAGTATTCCAAGCATTAAACCACTTTCCATTAAGAATTTTGAAAAAGAGAGACTTTG ACAACAATGGTGTCATACCGGAAGAGAAAAGCTTTGATCCAAGCTTTCAACTCCTTTTCATTTGTCATG TGATGATCATTGTATTTGTTGAAGTTGAGCTGCTTTTCTTTTGTCCAGAAGACATGTATGGATACTATTA CTATATAGTTAAGGTGAACTCAGCA (SEQ ID NO:287). Anti-sense polynucleotides with the sequences CCACATGGTCCAGTATCTGCC (AK195, RBCS_—1-2-3-4, SEQ ID NO:288), CAAGCAAGGAACCCATCCATT (AK196, RBCS_—1-2-3-4, SEQ ID NO:289), GGCCACACCTGCATGCATTGC (AK197, RBCS_—1-2-3-4, SEQ ID NO:290), GTGTTCACGGTAGACAAATCC (AK198, RBCS_—1-2, SEQ ID NO:291), TGCACTGCACTTGACGCACGT (AK199, RBCS_—1-2, SEQ ID NO:292), AACTGATGCATTGCACTTGAC (AK200, RBCS_—3-4, SEQ ID NO:293), CAAATCAGGAAGGTATGAGAG (AK201, RBCS_—3-4, SEQ ID NO:294), and TGTCAAGGTTTTGTTTCCTGG (AK202, RBCS_—3-4, SEQ ID NO:295) were designed for the endogenous Nicotiana benthamiana ribulose-1,5-bisphosphate carboxylase oxygenase (RuBisCO) gene, based on the Nicotiana benthamiana chloroplastic RuBisCO small chain 2A cDNA sequence fragments

GCAATGGCTTCCTCAGTTCTTTCCTCAGCAGCAGTTGCCACCCGCAGCAATGTTGCTCAAGCTAACATG GTTGCACCTTTCACAGGTCTTAAGTCTGCTGCCTCATTCCCTGTTTCAAGAAAGCAAAACCTTGACATC ACTTCCATTGCCAGCAACGGCGGAAGAGTGCAATGCATGCAGGTGTGGCCACCAATTAACATGAAGA AGTATGAGACTCTCTCATACCTTCCCGATTTGAGCCAGGAGCAATTGCTCTCCGAAATTGAGTACCTTT TGAAGAATGGATGGGTTCCTTGCTTGGAATTCGAGACTGAGAAAGGATTTGTCTACCGTGAACACCAC AAGTCACCAGGATACTATGATGGCAGATACTGGACCATGTGGAAGCTACCTATGTTCGGATGCACTGA TGCCACCCAAGTGTTGGCTGAGGTGGGAGAGGCGAAGAAGGAATACCCACAGGCCTGGGTCCGTATC ATTGGATTTGACAACGTGCGTCAAGTGCAGTGCATCAGTTTCATTGCCTCCAAGCCTGACGGCTAC (SEQ ID NO:296),
ACAATGGCTTCCTCAGTTCTTTCCTCAGCAGCAGTTGCCACCCGCAGCAATGTTGCTCAAGCTAACATG GTTGCACCTTTCACTGGTCTTAAGTCAGCTGCCTTTTTCCCTGTTTCAAGGAAGCAAAACCTTGACATC ACTTCCATTGCCAGCAACGGCGGAAGAGTGCAATGCATGCAGGTGTGGCCACCAATTAACAAGAAGA AGTACGAGACTCTCTCATACCTTCCTGATCTGAGCGTGGAGCAATTGCTTAGCGAAATTGAGTACCTCT TGAAAAATGGATGGGTTCCTTGCTTGGAATTCGAGACTGAGCGCGGATTTGTCTACCGTGAACACCAC AAGTCACCGGGATACTATGACGGCAGATACTGGACCATGTGGAAGTTGCCTATGTTCGGATGCACTGA TGCCACCCAAGTGTTGGCCGAGGTGGAAGAGGCGAAGAAGGCATACCCACAGGCCTGGATCCGTATT ATTGGATTCGACAACGTGCGTCAAGTGCAGTGCATCAGTTTCATTGCCTACAAGCCAGAAGGCTAC (SEQ ID NO:297),
CAAGCCAACATGGTTGCACCCTTCACTGGCCTCAAGTCCGCCTCCTCCTTCCCTGTTACCAGGAAACAA AACCTTGACATTACCTCCATTGCTAGCAATGGTGGAAGAGTTCAATGCATGCAGGTGTGGCCACCAAT TAACATGAAGAAGTACGAGACACTCTCATACCTTCCTGATTTGAGCCAGGAGCAATTGCTTAGTGAAG TTGAGTACCTTTTGAAAAATGGATGGGTTCCTTGCTTGGAATTCGAGACTGAGCGTGGATTCGTCTACC GTGAACACCACAACTCACCAGGATACTACGATGGCAGATACTGGACCATGTGGAAGTTGCCCATGTTC GGGTGCACTGATGCCACTCAGGTGTTGGCTGAGGTCGAGGAGGCAAAGAAGGCTTACCCACAAGCCT GGGTTAGAATCATTGGATTCGACAACGTCCGTCAAGTGCAATGCATCAGTTTTATCGCCTCCAAGCCA GAAGGCTAC (SEQ ID NO:298), and
GGCTCAGTTATGTCCTCAGCTGCCGCTGTTTCCACCGGCGCCAATGCTGTTCAAGCCAGCATGGTCGCA CCCTTCACTGGCCTCAAGGCCGCCTCCTCCTTCCCGGTTTCCAGGAAACAAAACCTTGACATTACTTCC ATTGCTAGAAATGGTGGAAGAGTCCAATGCATGCAGGTGTGGCCGCCAATTAACAAGAAGAAGTACG AGACACTCTCATACCTTCCTGATTTGAGCGTGGAGCAATTGCTTAGCGAAATTGAGTACCTTTTGAAAA ATGGATGGGTTCCTTGCTTGGAATTCGAGACTGAGCATGGATTCGTCTACCGTGAACACCACCACTCA CCAGGATACTACGATGGCAGATACTGGACGATGTGGAAGTTGCCCATGTTCGGGTGCACCGATGCCAC TCAGGTCTTGGCTGAGGTAGAGGAGGCCAAGAAGGCTTACCCACAAGCCTGGGTCAGAATCATTGGAT TCGACAACGTCCGTCAAGTGCAATGCATCAGTTTCATCGCCTACAAGCCCGAAGGCTAT (SEQ ID NO:299).

Nicotiana benthamiana plants were treated using a procedure similar to that described in Example 12. Polynucleotide solution (or mixed polynucleotides in the case of EPSPS and RuBisCO) were prepared in 0.01% (v/v) SILWET L-77® brand surfactant and 2% (w/v) ammonium sulfate in 5 millimolar sodium phosphate, pH 6.8. Two fully expanded leaves per plant were dipped into 0.1% SILWET L-77® brand surfactant solution freshly made with ddH2O for a few seconds, and allowed to dry. About 30 minutes later, 20 microliters of polynucleotide solution, was applied to each of the two pre-treated leaves. For PDS, each of 5 plants received 25 nanomoles of the PDS anti-sense polynucleotide (SEQ ID NO:34); for EPSPS, each of 5 plants received 50 nanomoles of each EPSPS anti-sense polynucleotide (SEQ ID NOS:279-284); and for RuBisCO, each of 5 plants received 50 nanomoles of each RuBisCO anti-sense polynucleotide (SEQ ID NOS:288-295). Paired control plants were treated with buffer (0.01% (v/v) SILWET L-77® brand surfactant and 2% (w/v) ammonium sulfate in 5 millimolar sodium phosphate, pH 6.8). The results measured as plant height at 12 days (PDS and EPSPS) or 10 days (RuBisCO) after treatment, are shown in FIGS. 36A-36B. Plants treated with the PDS anti-sense polynucleotide displayed severe stunting (FIG. 36A) and bleaching. Plants treated with the EPSPS anti-sense polynucleotides displayed severe stunting (FIG. 36B) and severe damage to the meristem and stem tissues. Plants treated with the RuBisCO anti-sense polynucleotides displayed severe stunting (FIG. 36C) and malformed apical tissues.

A second set of experiments was designed to investigate the effects of silencing a component of the endogenous RNAi silencing pathway in a plant. Argonaute (AGO) proteins are components of the RNA-induced silencing complex (RISC) which binds small RNAs in the RNAi silencing process. Suppression of Argonaute would be expected to reduce the observed phenotypic effect caused by an RNAi silencing process. AGO1 anti-sense polynucleotides with the sequences GGAGGCAAAATACGAGCCTCA (HL510, SEQ ID NO:300), CACTAATCTTAATACCAAACT (HL511, SEQ ID NO:301), TATGGGTCATTAGCATAGGCATTAT (HL512, SEQ ID NO:302), TCTCAAGAATATCACGCTCCC (HL513, SEQ ID NO:303), CCCTTGGGGACGCTGGCAGGTCAC (HL514, SEQ ID NO:304), TAATACGACTCACTATAGGGGGAGAGAGCTAGATCTTTTG (HL515, SEQ ID NO:305), TAATACGACTCACTATAGGCACAGTATTTCTTCCTCCAACC (HL516, SEQ ID NO:306), TTGCTCATCTTAAATACATGT (HL517, SEQ ID NO:307), TCATCTTAAATACATGTTTTGTCA (HL518, SEQ ID NO:308), TTATCTTCAGGGATACATTAGC (HL519, SEQ ID NO:309), AATACTGCTTGCTCATCTTAAATA (HL520, SEQ ID NO:310), GACAATTCCAAGTTCAGTTTC (HL521, SEQ ID NO:311), CCGTTTTAGATCACCATAAAGAGA (HL522, SEQ ID NO:312), TTGTCTGGTAATATCACAATC (HL523, SEQ ID NO:313) were designed for the endogenous Nicotiana benthamiana Argonaute-1 (AGO1) gene, based on two Nicotiana benthamiana AGO1-2 partial cDNA sequences,

ATGGTGAGGAAGAGGAGAACTGAGTTACCTGGTTCTGGTGAGAGCTCTGGGTCTCAAGAAACTGGCG GACAGGGTCGTGGCCAGCATCCACAGCAGCTGCACCAAGCTACCTCCCAGACTCCATATCAAACTGCA ATGACTACTCAGCCAATACCTTATGCAAGACCAACTGAAACATCCTCCGAAGCTGGTTCCTCATCTCA GCCACCTGAGCAGGCAGCTCTACAAGTGACACAACAGTTCCAGCAACTTGCTTTGCAACAAGAAGCGG CTACAACGCAAGCAGTTCCACCTGCATCAAGCAAATTACTAAGGTTTCCCCTGCGTCCAGGGAAGGGG AGCAATGGTATGAGATGCATAGTCAAAGCCAATCACTTCTTCGCAGAGCTGCCTGACAAAGACTTGCA CCAGTATGATGTCACAATTTCTCCAGAGGTGTCATCACGTGGCGTCAACCGTGCTGTCATGGCGCAACT GGTGAAGCTGTACCAAGAATCTCATCTTGGGAAGAGACTTCCAGCATATGATGGAAGGAAAAGTCTAT ACACTGCAGGGCCCCTTCCATTTGTTCAAAAAGACTTCAAAATAACTCTTATTGATGATGAGGATGGG CCTGGTGGTGCTAGAAGGGAAAGGGAATTTAAAGTTGTGATCAAATTGGCTGCCCGTGCTGATCTTCA TCACTTGGGAATGTTTTTAGAAGGGAAACAGGCTGATGCACCTCAAGAGGCGCTTCAAGTTCTGGATA TTGTTCTGCGTGAGTTGCCAACATCTAGGTTTTGTCCTGTGGGTCGTTCTTTCTATTCCCGTGATTTAGG GCGAAAGCAACCATTGGGTGAAGGTTTAGAAAGTTGGCGTGGGTTCTATCAAAGCATTCGCCCCACAC AAATGGGCTTATCACTGAACATCGATATGTCTTCCACTGCATTCATTGAGCCACTGCCAGTCATTGATT TTGTGACACAGCTTCTGAACCGAGATGTGCCATCTAGACCACTGTCTGATGCTGGCCGTGTAAAGATA AAAAAAGCTCTGAGAGGTGTGAAGGTGGAGGTTACTCATCGTGGAAATATGCGGAGGAAGTACCGCA TTTCGGGTTTAACATCTCAAGCAACAAGAGAGTTGACCTTCCCTGTTGATGAAAATGGTACAGTGAAA TCTGTAATTGAGTATTTTCGAGAAACATATGGGTTTGTAATTCAGCATACTCAGTGGCCTTGTCTACAA GTTGGAAATCAGCAGAGACCTAATTACTTGCCAATGGAAGTCTGCAAGATTGTGGAGGGACAAAGGT ACTCAAAGCGCTTGAATGAGAGACAGATTACTGCACTTCTGAAAGTGACCTGCCAGCGTCCCCAAGGG AGGGAGCGTGATATTCTTGAGACCGTACATCATAATGCCTATGCTAATGACCCATATGCCAAGGAGTT TGGTATTAAGATTAGTGACAAGTTGGCACAAGTTGAGGCTCGTATTTTGCCTCCACCTCGGCTTAAATA TCATGATAACGGTCGAGAAAAGGACTGCCTGCCACAAGTTGGCCAATGGAATATGATGAATAAGAAA ATGGTAAATGGAGGGACGGTGAACAATTGGATCTGCATAAACTTCTCTCGCAATGTGCAAGATAGTGT TGCTCATGGGTTTTGCTCTGAGCTTGCACAAATGTGCCAGATATCTGGCATGAATTTCAATCCAAATCC TGTTCTGCCACCTTCGAGTGCACGCCCTGATCAGGTCGAAAGAGTATTGAAAACTCGATTTCATGATGC TATGACTAAGTTGCAGCTGCATGGGAGAGAGCTTGATTTGCTAGTTGTCATCTTGCCAGACAATAATG GATCTCTTTATGGTGATCTGAAGCGCATTTGTGAGACTGAACTAGGAGTCGTCTCACAGTGCTGTTTGA CAAAACATGTATTTAAGATGAGCAAACAGTATCTAGCCAATGTAGCGCTGAAAATCAATGTGAAGGTG GGAGGGAGAAACACTGTGCTTGTTGATGCAATATCGAGGCGAATTCCTCTTGTCAGCGACCGGCCTAC CATCATTTTTGGTGCAGATGTCACCCACCCTCACCCTGGGGAGGACTCTAGCCCATCCATTGCCGCGGT GGTTGCTTCTCAAGATTGGCCTGAGATTACAAAGTATGCTGGTCTAGTTTCTGCTCAAGCCCATAGGCA AGAGCTTATTCAGGATCTGTACACGACTAGGCAAGATCCTGTTAAGGGGACAGTTGCTGGTGGAATGA TTAAGGACTTACTTATATCCTTCCGAAGAGCTACTGGACAAAAGCCCCAGAGAATAATTTTCTATAGG GATGGTGTTAGTGAAGGACAATTTTATCAAGTGCTTCTGTTCGAACTTGATGCGATCCGCAAAGCATGT GCGTCTTTGGAGCCAAATTATCAGCCCCCAGTCACATTTGTTGTGGTTCAGAAACGACATCACACAAG GCTTTTTGCCAATAACCACCGTGACAGAAATGCAGTTGACAGGAGCGGGAACATTATACCTGGTACTG TTGTAGATTCAAAGATATGCCACCCGACAGAGTTTGATTTCTATCTTTGTAGCCATGCCGGCATACAGG GTACGAGCCGTCCAGCTCACTACCATGTTCTATGGGACGAGAACAAATTCACAGCCGATGCGCTGCAG TCTTTGACCAACAACCTCTGCTATACATATGCAAGGTGCACGCGTTCCGTCTCCATCGTTCCCCCTGCA TATTATGCACATTTGGCAGCTTTCCGTGCTCGATTTTATATGGAGCCGGAGACATCTGACGGTGGTTCA GTAACAAGTGGGGCTGCTGGTGGCAGAGGGGGTGGTGCAGGAGCTGCTGGAAGGAACACCCGAGCCC CAAGTGCTGGTGCTGCTGTTAGACCTCTTCCTGCGCTCAAGGATAATGTGAAGAGGGTTATGTTCTACT GC (SEQ ID NO:314) and
CACCTATCACTCTCTTTCTCTCTCTACAAACATATCGTGCCGTTTCTCTCTCGGCCTCTCTTCGTGTTTTA GGGCACCGTGGTGGTTGGTATCCAGGCGGCGGTTTTGAGTTATTACCATGGTGCGGAAGAAGAGGACT GATGTTCCTGGTGGTGCTGAGAGTTTTGAGTCCCATGAAACTGGAGGGGCACGAGGTGGTGCCCAACG CCCATCACAGCAGCAGCAACATCAGCATCAGCAAGGCGGAGGAAGAGGCTGGGCACCTCAGCATGGA GGACATGGTGGCCGTGGTGGTGGGGGAGCTCCACGTGGTGGAATGGCCCCTCAACAATCCTATGGTGG ACCTCCTGAATACTACCAACAGGGCAGGGGAACTCAACAGTATCAACGAGGTGGAGGACAACCCCAG CGCCGTGGTGGCATGGGGGGCCGTGGGGCACGGCCACCAGTACCCGAGCTGCACCAAGCAACCCAGA CTCCACATCAGCCTGTACCATATGGAAGACCATCAGAAACATACTCAGAGGCTGGTTCCTCGTCTCAG CCACCTGAACCAACGACACAGCAAGTGACTCAGCAATTCCAGCAACTTGTTGTGCAGCCAGAAGCAGC TGCAACCCAAGCAATACAACCAGCATCGAGCAAGTCGATGAGGTTTCCACTCCGGCCAGGAAAGGGT AGTACTGGTATTAGATGCATAGTTAAGGCCAATCACTTCTTTGCCGAGTTACCTGACAAAGATCTGCAC CAGTATGATGTTTCAATTACTCCTGAGGTCGCCTCTCGGGGTGTCAACCGGGCCGTCATGGAGCAGCT GGTGAAGCTTTATAGAGAATCCCATCTTGGGAAGAGGCTTCCAGCCTATGACGGAAGAAAAAGTCTAT ACACAGCAGGGCCCCTCCCTTTTGTTCAAAAGGATTTTAAAATCACTCTAATTGATGATGATGATGGAC CTGGTGGTGCTAGGAGGGAAAGAGAGTTTAAAGTTGTGATCAAGCTGGCGGCTCGTGCTGATCTTCAT CACTTGGGGATGTTCTTACAAGGGAGACAGGCTGATGCACCGCAAGAAGCACTTCAGGTGCTGGATAT TGTGCTACGTGAGTTGCCAACATCTAGGTATTGTCCTGTGGGCCGCTCTTTCTATTCCCCTCATTTAGGA CGAAGACAACCACTGGGTGAAGGTTTAGAGAGCTGGCGTGGCTTCTATCAAAGTATTCGTCCTACACA GATGGGATTATCCCTGAATATTGATATGTCTTCCACGGCTTTCATTGAGCCACTGCCGATTATTGACTT CGTGAGCCAGCTTCTGAATCGGGATATCTCTTCTAGACCACTGTCTGATGCTGACCGCGTTAAGATAAA GAAGGCACTGAGAGGTGTAAAGGTGGGGGTCACTCATCGTGGAAATATGCGGAGGAAGTATCGCATT TCTGGCTTGACGTCTCAAGCAACAAGAGAGTTGACTTTTCCTGTCGATGAAAGGGGTACGATGAAAGC TGTTGTGGAATATTTTCGGGAAACCTATGGTTTTGTCATTCGGCATACCCAGTGGCCTTGTCTTCAAGT TGGAAATACGCAGAGGCCAAATTACTTGCCAATGGAAGTATGTAAGATTGTAGAGGGACAGAGATAC TCAAAGCGCTTGAATGAGAGGCAGATAACAGCACTTCTAAAAGTGACCTGCCAACGTCCTCAAGAGA GAGAACGTGATATTCTTCAGACTGTTCATCACAATGCTTATGCTGATGACCCATATGCGAAGGAGTTTG GTATTAAGATCAGTGAGGAGCTTGCTCAAGTTGAGGCTCGCGTTTTGCCTGCACCTTGGCTTAAATACC ATGATACAGGTCGAGAGAAAGACTGTCTGCCACAAGTGGGCCAGTGGAATATGATGAATAAGAAAAT GGTTAATGGAGGAACAGTGAACAACTGGATCTGTGTAAACTTTTCTCGCAATGTGCAAGACACAGTTG CACGTGGATTTTGTTCCGAGCTTGCACAAATGTGCATGATATCCGGAATGAACTTCAATCCCAATCCTG TTCTACCACCAGTGAGTGCTCGCCCTGATCAAGTTGAGAGAGTCTTGAAAACTCGATTTCACGATGCTA TGACAAAGTTGCAGCCAAATGGGAGAGAGCTAGATCTTTTGATTGTGATATTACCAGACAATAACGGC TCTCTTTATGGTGATCTAAAACGGATTTGTGAAACTGAACTTGGAATTGTCTCACAATGCTGCTTGACA AAACATGTATTTAAGATGAGCAAGCAGTATTTAGCTAATGTATCCCTGAAGATAAATGTGAAGGTTGG AGGAAGAAATACTGTGCTGGTTGATGCGCTCTCTAGACGAATTCCCCTTGTCAGCGACCGCCCAACTA TCATTTTTGGTGCAGATGTCACCCATCCCCACCCTGGGGAGGATTCTAGCCCGTCAATTGCTGCGGTGG TTGCTTCTCAAGATTGGCCTGAAATTACAAAGTATGCTGGTTTGGTTTCTGCTCAAGCGCATAGGCAAG AGCTTATACAAGATCTGTACAAGACTTGGCAAGATCCAGTTAGAGGACCTGTGACTGGTGGCATGATA AAGGAATTACTTATTTCCTTCCGTCGAGCAACTGGACAGAAGCCGCAGAGAATTATATTCTACAGAGA TGGTGTTAGTGAAGGACAATTTTACCAAGTTCTTCTTTTTGAACTTGATGCAATCCGCAAGGCATGTGC ATCTTTAGAACCCAACTATCAGCCCCCGGTTACGTTTGTTGTGGTCCAGAAACGGCATCATACTAGGTT GTTTGCCAATAACCACCACGACAGAAATGCAGTTGATCGGAGTGGGAACATTTTGCCTGGTACCGTTG TAGATTCAAAGATATGCCACCCTACTGAATTTGATTTCTATCTCTGTAGCCATGCCGGCATACAGGGTA CTAGCCGCCCAGCTCATTATCATGTTCTGTGGGATGAGAACAATTTTACTGCTGACGCCCTGCAGTCTT TGACTAACAATCTTTGCTATACATATGCTAGGTGTACTCGTTCTGTCTCCATTGTTCCACCAGCATATTA TGCACATTTGGCAGCTTTCCGTGCTCGGTTTTACATGGAGCCAGAGACATCTGATAATGGATCAGTCAC AAGCGCAGCTGCTTCAAACAGAGGAGGTTTAGGAGCTATGGGAAGGAGCACGCGAGCACCAGGTGCT GGTGCTGCTGTAAGGCCCCTTCCTGCTCTCAAGGAGAATGTTAAGAGGGTTATGTTTTATTGT (SEQ ID NO:315).

Nicotiana benthamiana plants were treated using a procedure similar to that described in Example 12. Polynucleotide solution (or mixed polynucleotides in the case of AGO1) were prepared in 0.01% (v/v) SILWET L-77® brand surfactant and 2% (w/v) ammonium sulfate in 5 millimolar sodium phosphate, pH 6.8. Two fully expanded leaves per plant were dipped into 0.1% SILWET L-77® brand surfactant solution freshly made with ddH2O for a few seconds, and allowed to dry. About 30 minutes later, 20 microliters of polynucleotide solution was applied to each of the two pre-treated leaves. For PDS, each of 5 plants received 25 nanomoles of the PDS anti-sense polynucleotide (SEQ ID NO:34); for AGO1, each of 5 plants received 50 nanomoles of each of the 14 AGO1 anti-sense polynucleotides (SEQ ID NOS:300-313); for PDS and AGO combined treatments, each of 5 plants received 25 nanomoles of the PDS anti-sense polynucleotide (SEQ ID NO:34) and 50 nanomoles of each of the 14 AGO1 anti-sense polynucleotides (SEQ ID NOS:300-313) applied on separate leaves. Paired control plants were treated with buffer (0.01% (v/v) SILWET L-77® brand surfactant and 2% (w/v) ammonium sulfate in 5 millimolar sodium phosphate, pH 6.8). No difference was observed between plants treated with the AGO1 anti-sense polynucleotides and the plants treated with buffer alone. Plants treated with the PDS anti-sense polynucleotide displayed systemic bleaching. Plants treated with both the PDS anti-sense polynucleotide and the separately applied AGO1 anti-sense polynucleotides did not display systemic bleaching, indicating that suppression of AGO1 blocked the systemic spread of the silencing signal.

Example 34

This example illustrates a method for inducing systemic regulation of a target endogenous gene in a growing plant comprising topically coating onto leaves of said growing plant polynucleotides having sequence essentially identical to, or essentially complementary to, a sequence of 18 or more contiguous nucleotides in either said target endogenous gene or messenger RNA transcribed from said target endogenous gene, whereby said polynucleotides permeate the interior of said growing plant and induce systemic regulation of said target endogenous gene. More specifically this example illustrates use of a composition comprising surfactant and polynucleotides to at least transiently induce systemic regulation of the endogenous Zea mays 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) gene.

A genomic sequence of the endogenous Zea mays 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) gene was identified as

ACCTACTTCCCCCTCGCCCCTCTCATGGTCTCTCTCGCGCCCAGATCTGCTACTAGACGGCACCGCTGC AGCGCGTCGTGTCGCGGGGGTTGGTGGCAGGCAGCGAGAGCTTGCCGTTCCTCTCTCTCAGTTGTCAG GTCCTAGGCTCACCTCACCGGCTCCCAGCCCGCTTCTATTTCTTCCTCCCCGACCCCGTGCAGGTGGCA GTCCAGTCCACGCCACCAACCGCGAGGCGAACCAAACCAACCCACTCTCCCCAACCCCGCGCGCCCAG GCCGCCCGCCCTACCAACCATCGGCGTCGGCAATGGCGGCCATGGCGACCAAGGCCGCCGCGGGCAC CGTGTCGCTGGACCTCGCCGCGCCGCCGGCGGCGGCAGCGGCGGCGGCGGTGCAGGCGGGTGCCGAG GAGATCGTGCTGCAGCCCATCAAGGAGATCTCCGGCACCGTCAAGCTGCCGGGGTCCAAGTCGCTTTC CAACCGGATCCTCCTGCTCGCCGCCCTGTCCGAGGTGAGCGATTTTGGTGCTTGCTGCGCTGCCCTGTC TCACTGCTACCTAAATGTTTTGCCTGTCGAATACCATGGATTCTCGGTGTAATCCATCTCACGATCAGA TGCACCGCATGTCGCATGCCTAGCTCTCTCTAATTTGTCTAGTAGTTTGTATACGGATTAATATTGATA AATCGGTACCGCAAAAGCTAGGTGTAAATAAACACTAGAAAATTGGATGTTCCCCTATCGGCCTGTAC TCGGCTACTCGTTCTTGTGATGGCATGCTGTCTCTTCTTGGTGTTTGGTGAACAACCTTATGAAATTTGG GCGCAAAGAACTCGCCCTCAAGGGTTGATCTTATGCCATCGTCATGATAAACAGTGGAGCACGGACGA TCCTTTACGTTGTTTTTAACAAACTTTGTCAGAAAACTAGCATCATTAACTTCTTAATGACGATTTCACA ACAAAAAAAGGTAACCTCGCTACTAACATAACAAAATACTTGTTGCTTATTAATTATATGTTTTTTAAT CTTTGATCAGGGGACAACAGTGGTTGATAACCTGTTGAACAGTGAGGATGTCCACTACATGCTCGGGG CCTTGAGGACTCTTGGTCTCTCTGTCGAAGCGGACAAAGCTGCCAAAAGAGCTGTAGTTGTTGGCTGT GGTGGAAAGTTCCCAGTTGAGGATTCTAAAGAGGAAGTGCAGCTCTTCTTGGGGAATGCTGGAACTGC AATGCGGCCATTGACAGCAGCTGTTACTGCTGCTGGTGGAAATGCAACGTATGTTTCCTCTCTTTCTCT CTACAATACTTGCTGGAGTTAGTATGAAACCCATGGGTATGTCTAGTGGCTTATGGTGTATTGGTTTTT GAACTTCAGTTACGTGCTTGATGGAGTACCAAGAATGAGGGAGAGACCCATTGGCGACTTGGTTGTCG GATTGAAGCAGCTTGGTGCAGATGTTGATTGTTTCCTTGGCACTGACTGCCCACCTGTTCGTGTCAATG GAATCGGAGGGCTACCTGGTGGCAAGGTTAGCTACTAAGGGCCACATGTTACATTCTTCTGTAAATGG TACAACTATTGTCGAGCTTTTGCATTTGTAAGGAAAGCATTGATTGATCTGAATTTGATGCTACACCAC AAAATATCCTACAAATGGTCATCCCTAACTAGCAAACAATGAAGTAATACTTGGCATGTGTTTATCAA ATTAATTTCCATCTTCTGGGGCATTGCCTGTTTTCTAGTCTAATAGCATTTGTTTTTAGCATTAATTAGC TCTTACAATTGTTATGTTCTACAGGTCAAGCTGTCTGGCTCCATCAGCAGTCAGTACTTGAGTGCCTTG CTGATGGCTGCTCCTTTGGCTCTTGGGGATGTGGAGATTGAAATCATTGATAAATTAATCTCCATTCCC TACGTCGAAATGACATTGAGATTGATGGAGCGTTTTGGTGTGAAAGCAGAGCATTCTGATAGCTGGGA CAGATTCTACATTAAGGGAGGTCAAAAATACAAGTAAGCTCTGTAATGTATTTCACTACTTTGATGCC AATGTTTCAGTTTTCAGTTTTCCAAACAGTCGCATCAATATTTGAATAGATGCACTGTAGAAAAAAAAT CATTGCAGGGAAAAACTAGTACTGAGTATTTTGACTGTAAATTATTTTACCAGTCGGAATATAGTCAGT CTATTGGAGTCAAGAGCGTGAACCGAAATAGCCAGTTAATTATCCCATTATACAGAGGACAACCATGT ATACTATTGAAACTTGGTTTATAAGAGAATCTAGGTAGCTGGACTCGTAGCTGCTTGGCATGGATACCT TCTTATCTTTAGGAAAAGACACTTGATTTTTTTTTTCTGTGGCCCTCTATGATGTGTGAACCTGCTTCTC TATTGCTTTAGAAGGATATATCTATGTCGTTATGCAACATGCTTCCCTTAGCCATTTGTACTGAAATCA GTTTCATAAGTTCGTTAGTGGTTCCCTAAACGAAACCTTGTTTTTCTTTGCAATCAACAGGTCCCCTAA AAATGCCTATGTTGAAGGTGATGCCTCAAGCGCAAGCTATTTCTTGGCTGGTGCTGCAATTACTGGAG GGACTGTGACTGTGGAAGGTTGTGGCACCACCAGTTTGCAGGTAAAGATTTCTTGGCTGGTGCTACAA TAACTGCTTTTGTCTTTTTGGTTTCAGCATTGTTCTCAGAGTCACTAAATAACATTATCATCTGCAAATG TCAAATAGACATACTTAGGTGAATTCATGTAACCGTTTCCTTACAAATTTGCTGAAACCTCAGGGTGAT GTGAAGTTTGCTGAGGTACTGGAGATGATGGGAGCGAAGGTTACATGGACCGAGACTAGCGTAACTG TTACTGGCCCACCGCGGGAGCCATTTGGGAGGAAACACCTCAAGGCGATTGATGTCAACATGAACAA GATGCCTGATGTCGCCATGACTCTTGCTGTGGTTGCCCTCTTTGCCGATGGCCCGACAGCCATCAGAGA CGGTAAAACATTCTCAGCCCTACAACCATGCCTCTTCTACATCACTACTTGACAAGACTAAAAACTATT GGCTCGTTGGCAGTGGCTTCCTGGAGAGTAAAGGAGACCGAGAGGATGGTTGCGATCCGGACGGAGC TAACCAAGGTAAGGCTACATACTTCACATGTCTCACGTCGTCTTTCCATAGCTCGCTGCCTCTTAGCGG CTTGCCTGCGGTCGCTCCATCCTCGGTTGCTGTCTGTGTTTTCCACAGCTGGGAGCATCTGTTGAGGAA GGGCCGGACTACTGCATCATCACGCCGCCGGAGAAGCTGAACGTGACGGCGATCGACACGTACGACG ACCACAGGATGGCCATGGCCTTCTCCCTTGCCGCCTGTGCCGAGGTCCCCGTGACCATCCGGGACCCT GGGTGCACCCGGAAGACCTTCCCCGACTACTTCGATGTGCTGAGCACTTTCGTCAAGAATTAATAAAG CGTGCGATACTACCACGCAGCTTGATTGAAGTGATAGGCTTGTGCTGAGGAAATACATTTCTTTTGTTC TGTTTTTTCTCTTTCACGGGATTAAGTTTTGAGTCTGTAACGTTAGTTGTTTGTAGCAAGTTTCTATTTC GGATCTTAAGTTTGTGCACTGTAAGCCAAATTTCATTTCAAGAGTGGTTCGTTGGAATAATAAGAATA ATAAATTACGTTTCAGTGGCTGTCAAGCCTGCTGCTACGTTTTAGGAGATGGCATTAGACATTCATCAT CAACAACAATAAAACCTTTTAGCCTCAAACAATAATAGTGAAGTTATTTTTTAGTCCTAAACAAGTTGC ATTAGGATATAGTTAAAACACAAAAGAAGCTAAAGTTAGGGTTTAGACATGTGGATATTGTTTTCCAT (SEQ ID NO:316), with a 5′ untranslated region located at nucleotide positions 1-306 and a 3′ untranslated region located at nucleotide positions 3490-3907. A EPSPS cDNA sequence was identified as
ACCTACTTCCCCCTCGCCCCTCTCATGGTCTCTCTCGCGCCCAGATCTGCTACTAGACGGCACCGCTGC AGCGCGTCGTGTCGCGGGGGTTGGTGGCAGGCAGCGAGAGCTTGCCGTTCCTCTCTCTCAGTTGTCAG GTCCTAGGCTCACCTCACCGGCTCCCAGCCCGCTTCTATTTCTTCCTCCCCGACCCCGTGCAGGTGGCA GTCCAGTCCACGCCACCAACCGCGAGGCGAACCAAACCAACCCACTCTCCCCAACCCCGCGCGCCCAG GCCGCCCGCCCTACCAACCATCGGCGTCGGCAATGGCGGCCATGGCGACCAAGGCCGCCGCGGGCAC CGTGTCGCTGGACCTCGCCGCGCCGCCGGCGGCGGCAGCGGCGGCGGCGGTGCAGGCGGGTGCCGAG GAGATCGTGCTGCAGCCCATCAAGGAGATCTCCGGCACCGTCAAGCTGCCGGGGTCCAAGTCGCTTTC CAACCGGATCCTCCTGCTCGCCGCCCTGTCCGAGGGGACAACAGTGGTTGATAACCTGTTGAACAGTG AGGATGTCCACTACATGCTCGGGGCCTTGAGGACTCTTGGTCTCTCTGTCGAAGCGGACAAAGCTGCC AAAAGAGCTGTAGTTGTTGGCTGTGGTGGAAAGTTCCCAGTTGAGGATTCTAAAGAGGAAGTGCAGCT CTTCTTGGGGAATGCTGGAACTGCAATGCGGCCATTGACAGCAGCTGTTACTGCTGCTGGTGGAAATG CAACTTACGTGCTTGATGGAGTACCAAGAATGAGGGAGAGACCCATTGGCGACTTGGTTGTCGGATTG AAGCAGCTTGGTGCAGATGTTGATTGTTTCCTTGGCACTGACTGCCCACCTGTTCGTGTCAATGGAATC GGAGGGCTACCTGGTGGCAAGGTCAAGCTGTCTGGCTCCATCAGCAGTCAGTACTTGAGTGCCTTGCT GATGGCTGCTCCTTTGGCTCTTGGGGATGTGGAGATTGAAATCATTGATAAATTAATCTCCATTCCCTA CGTCGAAATGACATTGAGATTGATGGAGCGTTTTGGTGTGAAAGCAGAGCATTCTGATAGCTGGGACA GATTCTACATTAAGGGAGGTCAAAAATACAAGTCCCCTAAAAATGCCTATGTTGAAGGTGATGCCTCA AGCGCAAGCTATTTCTTGGCTGGTGCTGCAATTACTGGAGGGACTGTGACTGTGGAAGGTTGTGGCAC CACCAGTTTGCAGGGTGATGTGAAGTTTGCTGAGGTACTGGAGATGATGGGAGCGAAGGTTACATGGA CCGAGACTAGCGTAACTGTTACTGGCCCACCGCGGGAGCCATTTGGGAGGAAACACCTCAAGGCGATT GATGTCAACATGAACAAGATGCCTGATGTCGCCATGACTCTTGCTGTGGTTGCCCTCTTTGCCGATGGC CCGACAGCCATCAGAGACGTGGCTTCCTGGAGAGTAAAGGAGACCGAGAGGATGGTTGCGATCCGGA CGGAGCTAACCAAGCTGGGAGCATCTGTTGAGGAAGGGCCGGACTACTGCATCATCACGCCGCCGGA GAAGCTGAACGTGACGGCGATCGACACGTACGACGACCACAGGATGGCCATGGCCTTCTCCCTTGCCG CCTGTGCCGAGGTCCCCGTGACCATCCGGGACCCTGGGTGCACCCGGAAGACCTTCCCCGACTACTTC GATGTGCTGAGCACTTTCGTCAAGAATTAATAAAGCGTGCGATACTACCACGCAGCTTGATTGAAGTG ATAGGCTTGTGCTGAGGAAATACATTTCTTTTGTTCTGTTTTTTCTCTTTCACGGGATTAAGTTTTGAGT CTGTAACGTTAGTTGTTTGTAGCAAGTTTCTATTTCGGATCTTAAGTTTGTGCACTGTAAGCCAAATTTC ATTTCAAGAGTGGTTCGTTGGAATAATAAGAATAATAAATTACGTTTCAGTGGCTGTCAAGCCTGCTG CTACGTTTTAGGAGATGGCATTAGACATTCATCATCAACAACAATAAAACCTTTTAGCCTCAAACAAT AATAGTGAAGTTATTTTTTAGTCCTAAACAAGTTGCATTAGGATATAGTTAAAACACAAAAGAAGCTA AAGTTAGGGTTTAGACATGTGGATATTGTTTTCCAT (SEQ ID NO:317). A 240 base pair double-stranded RNA polynucleotide was designed with one strand corresponding to the DNA sequence TACTTGAGTGCCTTGCTGATGGCTGCTCCTTTGGCTCTTGGGGATGTGGAGATTGAAATCATTGATAAA TTAATCTCCATTCCGTACGTCGAAATGACATTGAGATTGATGGAGCGTTTTGGTGTGAAAGCAGAGCA TTCTGATAGCTGGGACAGATTCTACATTAAGGGAGGTCAAAAATACAAGTCCCCTAAAAATGCCTATG TTGAAGGTGATGCCTCAAGCGCAAGCTATTTCTTG (SEQ ID NO:318) which corresponds to a 240 nucleotide segment located at nucleotide positions 937-1176 of the EPSPS cDNA sequence.

Zea mays (Gaspe) seeds were germinated on germination paper. Seedlings were transferred to 4 inch pots and plants were grown in a growth chamber. Three 17-day-old plants were topically treated with polynucleotides and three plants were used as controls. Two lower leaves of each plant were marked and then pre-treated by dipping in a solution of 0.1% SILWET L-77® brand surfactant. About 30 minutes after the surfactant pre-treatment, 20 microliters of treatment solution was applied to the upper side of each of the two pre-treated leaves. Treatment solution consisted of a mixture of 100 microliters of 2× buffer solution, 90 microliters water, 10 microliters of a 4.6 micrograms/microliter solution of the EPSPS dsRNA (with one strand corresponding to SEQ ID NO:318); the 2× buffer solution was a mixture of 200 microliters of 0.1% SILWET L-77® brand surfactant, 200 microliters 50 millimolar sodium phosphate, 146 microliters 34% ammonium phosphate, and 454 microliters water. At 8 days after treatment, two of the three polynucleotide-treated plants were stunted with damaged or dead apical leaves (similar to the phenotype observed in similarly EPSPS polynucleotide-treated Nicotiana benthamiana plants), whereas all three of the control plants had normal growth and morphology (FIG. 37).

Example 35

The efficacy of different substances (including salts, a chelating agent, a humectant, and polyamines) as polynucleotide transferring agents or as enhancers of a known polynucleotide transferring agent was investigated. Ammonium sulfate had previously been shown to enhance permeability of plants to polynucleotides (see, e. g., Example 13). Table 26 lists the effect on herbicidal activity (presented as percent of weed control/kill, and as plant height) of ammonium sulfate and EDTA as additives to 1% SILWET L-77® brand surfactant spray solutions of topically applied polynucleotides (RNA) on glyphosate-resistant Palmer amaranth plants. In this particular experiment, ethylenediaminetetraacetic acid (EDTA) at 0.004% was found to act similarly to 2% ammonium sulfate in the spray solution, enhancing the efficacy of the polynucleotides and potentiating the herbicidal activity of glyphosate.

TABLE 26

Treatment
Palmer control (%)
Palmer height (cm)

No addition
0
7.5

+2% ammonium sulfate
43
1.8

+0.004% EDTA
45
1.0

Table 27 lists the effect on herbicidal activity (presented as percent of weed control/kill, and as plant height) of various salts including inorganic salts (sodium chloride, sodium sulfate, ammonium sulfate, ammonium chloride) and organic salts (tetramethylammonium chloride, tetraethylammonium chloride, tetrapropylammonium bromide, and tetrabutylphosphonium bromide) as additives to 1% SILWET L-77® brand surfactant spray solutions of topically applied polynucleotides (RNA) on glyphosate-resistant Palmer amaranth plants. In this particular experiment, ammonium chloride and tetrabutylphosphonium bromide were found to act similarly to ammonium sulfate in the spray solution, enhancing the efficacy of the polynucleotides and potentiating the herbicidal activity of glyphosate.

TABLE 27

Treatment
Palmer control (%)
Palmer height (cm)

No addition
0
16.0

+2% sodium chloride
15
15.0

+2% sodium sulfate
7
17.0

+2% ammonium sulfate
54
9.3

+2% ammonium chloride
52
10.3

+2% tetramethylammonium
19
15.0

chloride

+2% tetraethylammonium
27
12.0

chloride

+2% tetrapropylammonium
34
11.0

bromide

+2% tetrabutylphosphonium
19
13.3

bromide

+2% tetrabutylphosphonium
55
5.3

bromide

Table 28 lists the effect of the humectant glycerin on herbicidal activity (presented as percent of weed control/kill, and as plant height) of topically applied polynucleotides (RNA) on glyphosate-resistant Palmer amaranth plants. Glycerin was found to enhance the efficacy of the polynucleotides, potentiating the herbicidal activity of glyphosate.

TABLE 28

Treatment
Palmer control (%)
Palmer height (cm)

No addition
0
16.0

SILWET L-77 ® brand
54
9.3

surfactant/AMS (no glycerin)

SILWET L-77 ® brand
57
6.3

surfactant/AMS + 0.5% glycerin

FIG. 38 depicts the effect of varying glyphosate counter-ions on herbicidal activity (presented as percent of weed control/kill, and as plant height) of topically applied polynucleotides (RNA) on glyphosate-resistant Palmer amaranth plants. A mixture of EPSPS polynucleotides (IDT [1] (SEQ ID NO:83-84), IDT [2] (SEQ ID NO:85-86), IDT [3] (SEQ ID NO:87-88), and IDT [4] (SEQ ID NO:89-90)) in 0.5% SILWET L-77® brand surfactant, 2% ammonium sulfate in 10 millimolar sodium phosphate buffer, pH 6.8 with 0.2% Roundup® WeatherMax® carrier (MON56151 tallowamine surfactant blend of tallowamine (16-18C) and cocoamine (12-14C) in the ratio of 55:45) and 1682 g acid equivalent per hectare of one of the glyphosate salts; K+ glyphosate, isopropylammonium+ glyphosate or monoethanolammonium+ glyphosate at 215 liters/acre by Milli spray on 3 replicates of 4-6 inch glyphosate-resistant Palmer amaranth containing 16 copies of EPSPS. Plant height was scored at 21 days after glyphosate treatment. Results (presented as percent of weed control/kill, and as plant height) are given in Table 29. The isopropylammonium and monoethanolammonium salts of glyphosate provided better herbicidal activity compared to the potassium salt.

TABLE 29

Treatment
Palmer control (%)
Palmer height (cm)

No addition
0
16

K + glyphosate
23
12.3

K + glyphosate + EPSPS
32
10.8

polynucleotides

IPA + glyphosate
9
14.5

IPA + glyphosate + EPSPS
66
5.5

polynucleotides

MEA + glyphosate
9
14.5

MEA + glyphosate + EPSPS
66
5.5

polynucleotides

The effect of the polyamine cations spermine (N,N′-bis(3-aminopropyl)butane-1,4-diamine) and spermidine (N-(3-aminopropyl)butane-1,4-diamine) on herbicidal activity of topically applied polynucleotides (RNA) on glyphosate-resistant Palmer amaranth plants was investigated. Polynucleotide solutions were prepared using a mixture of equal amounts of the four oligonucleotide-size “short” dsRNA molecules described in Example 1, which have an anti-sense strand designed to hybridize to the mRNA transcribed from the Palmer amaranth EPSPS gene (SEQ ID NO:1) at positions 14-38 (short dsRNA-1), positions 153-177 (short dsRNA-2), 345-369 (short dsRNA-3), and 1105-1129 (short dsRNA-4), as indicated by underlined nucleotides in FIG. 1; the dsRNAs had a two nucleotide overhang at the 3′ end of the anti-sense strand, and had two deoxynucleotides as the terminal nucleotides at the 3′ end of the sense strand. The dsRNA polynucleotide solutions were prepared with either 1 or 10 millimolar spermine or spermidine or 2% ammonium sulfate, in a 10 millimolar sodium phosphate (pH 6.8) buffer. Control solutions (without polynucleotides) were prepared with either 1 or 10 millimolar spermine or spermidine or 2% ammonium sulfate, in a 10 millimolar sodium phosphate (pH 6.8) buffer. Glyphosate-resistant Palmer amaranth plants (33, 36, or 57 copies EPSPS) were pre-sprayed with 1% SILWET L-77® brand surfactant. The dsRNA polynucleotide solutions (11.6 grams/acre) or buffer solutions were applied as drops on four lower fully expanded leaves of glyphosate resistant Palmer amaranth by pipetting. Two days following polynucleotide treatment the plants were sprayed with glyphosate (3360 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide). Plants were photographed at 14 days after glyphosate treatment; results are shown in FIG. 39. Treatment with dsRNA and 10 millimolar spermine followed by glyphosate treatment killed glyphosate-resistant Palmer amaranth with 33-copy EPSPS and severely injured and stunted glyphosate-resistant Palmer amaranth with 36-copy EPSPS. Treatment with 10 mM spermidine alone stunted 33-copy glyphosate-resistant Palmer amaranth. In this particular experiment, neither spermine nor spermidine at 1 or 10 millimolar performed as well as 2% ammonium sulfate.

Example 36

The efficacy of different surfactants as polynucleotide transferring agents was tested in polynucleotide spray solutions applied to glyphosate-resistant Palmer amaranth. BREAK-THRU® brand surfactants were obtained from Evonik Industries; SILWET® brand surfactants were obtained from Momentive. Spray solutions were prepared the same day as spraying. A mixture of EPSPS polynucleotides (IDT [1] (SEQ ID NO:83-84), IDT [3] (SEQ ID NO:87-88), and IDT [4] (SEQ ID NO:89-90)) was added to spray solutions 15 to 50 minutes before spraying and 1- to 2-milliliters applied using a custom low-dead-volume (“milli”) sprayer to one-to-four inch glyphosate-resistant (R-22) Palmer amaranth plants grown from cuttings. Between 10 and 225 micrograms total polynucleotides were applied to each plant, depending on the experiment; typically 23 micrograms total polynucleotides were applied per plant. Treated plants were placed in a greenhouse set for either a 26.7/21.1 degrees Celsius or 29.4/21.1 degrees Celsius 14/10 hour temperature and supplemental light schedule. After 2 to 3 days, the plants were sprayed with glyphosate (“2× Wmax” or 1682 g acid equivalent per hectare of Roundup® WeatherMAX® brand herbicide) by regular sprayer (10 gallons/acre) and returned to the greenhouse. The amount of control (visual injury) relative to unsprayed treatments, plant height and pictures of Palmer amaranth were collected at different time intervals up to 21 days after glyphosate treatment. Fresh weight of above-soil plant material was collected at the last time point. An overall plant injury score between 0 and 3 was given each treatment based on the combined analysis of Control, Height, Fresh Weight and Visual Plant Phenotype, where “3” is strong herbicidal activity, “2” is moderate activity, “1” is mild activity and “0” is no activity observed after correction for any observed injury caused by treatment with glyphosate alone; results are shown in Table 30.

Physical properties of the different surfactants were also investigated and listed in Table 30. Seventy milliliters of surfactant solution (0.5% surfactant in aqueous solution containing 2% ammonium sulfate, buffer (20 millimolar potassium phosphate, pH 6.8), with or without an EPSPS polynucleotide (IDT [2] (SEQ ID NO:85-86), 0.09 milligrams/milliliter) added, were prepared on the same day as measurement. Dynamic surface tension was measured at ambient room temperature (22 to 23 degrees Celsius) on a Kruss BP100 tensiometer using the maximum bubble pressure method plotting surface tension versus surface age. The instrument was set to automatically detect the surface and immerse the capillary to a depth of 10 mm. Surface tension measurements for three surface ages (approximately 20, 500 and 1250 ms) were recorded. Surface tension in dynes per cm was reported at the 1250 ms interval as an approximation of static surface tension and the change between 20 and 500 ms was reported as an estimate of the dynamic surface tension. Hydrophile-lipophile balance (HLP) values for the surfactants were obtained from surfactant references and product information.

TABLE 30

Palmer

CAS

Surfactant
Surfactant
injury
Surface tension
delta 20-

Surfactant name
number
Chemistry
Type
Class
score
literature
1250 ms
500 ms
HLB

BREAK-THRU ®
na
polyether-
organosilicone
nonionic
3
na
22.7
27.1
40.0

S 321

modified

polysiloxane

BREAK-THRU ®
67674-67-3
polyether-
organosilicone
nonionic
3
22
26.9
23.0

S 200

modified

polysiloxane

BREAK-THRU ®
68937-55-3
polyether-
organosilicone
nonionic
1
na
43.8
2.9
40.0

OE 441

modified

polysiloxane

BREAK-THRU ®
27306-78-1
polyether-
organosilicone
nonionic
2
21
24.2
23.4

S 278

modified

polysiloxane

BREAK-THRU ®
na
polyether-
organosilicone
nonionic
2
47
50.3
7.7
16.7

S 243

modified

polysiloxane

SILWET L-77 ®
27306-78-1
trisiloxane;
organosilicone
nonionic
3
20.5
26.4
23.4
13.5

polyalkylene

oxide-modified

polymethylsiloxane

SILWET ® HS 429
na
hydrolytically
organosilicone
nonionic
3
32-40
40.1
12.1

stable silicone

SILWET ® HS 312
na
silicone
organosilicone
nonionic
3
26.7
29.5
11.3

BREAK-THRU ®
134180-76-
trisiloxane
organosilicone
nonionic
3
23
26.1
10.0

S 233
0

Claims

1. A method for selectively controlling targeted herbicide-resistant weeds or volunteer plants comprising topically applying onto a surface of said weeds or volunteer plants one or more polynucleotides and a transfer agent in a manner that does not integrate said one or more polynucleotides into a chromosome of said weeds or volunteer plants; wherein said transfer agent is selected from the group consisting of an organosilicone surfactant and a cationic lipid;wherein said transfer agent enables said one or more polynucleotides to permeate from the surface of said weeds or volunteer plants into cells of said weeds or volunteer plants;wherein said one or more polynucleotides comprise a sequence essentially identical or essentially complementary to a coding or non-coding sequence of an endogenous gene of said weed or volunteer plant or a messenger RNA that is transcribed from an endogenous gene of said weed or volunteer plant; andwherein said endogenous gene: (i) is an essential gene for maintaining the growth or life of said weed or volunteer plant, (ii) encodes a protein that provides herbicide resistance to said weed or volunteer plant, or (iii) transcribes to an RNA regulatory agent.
2. The method of claim 1, further comprising applying one or more of a salt and a non-polynucleotide herbicide.
3. The method of claim 1, wherein said weed or volunteer plant is pigweed, waterhemp, other amaranth species, mare's tail (horseweed), giant ragweed, common ragweed, johnsongrass, goosegrass, ryegrass, hairy crabgrass, velvetleaf, prickly lettuce, dandelion, alfalfa, corn, soybean, canola, cotton, sugar beet, sugarcane, wheat, rice, or a vegetable.
4. The method of claim 1, wherein said endogenous gene encodes a protein that provides herbicide resistance to said weed or volunteer plant and said protein is selected from the group consisting of a 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS), an acetohydroxyacid synthase, an acetolactate synthase (ALS), an acetyl-coenzyme A carboxylase (ACCase), a dihydropteroate synthase, a phytoene desaturase (PDS), a protoporphyrin IX oxygenase (PPO), a hydroxyphenylpyruvate dioxygenase (HPPD), a para-aminobenzoate synthase, a glutamine synthase (GS), a glufosinate-tolerant glutamine synthase, a 1-deoxy-D-xylulose 5-phosphate (DOXP) synthase, a dihydropteroate (DHP) synthase, a phenylalanine ammonia lyase (PAL), a glutathione S-transferase (GST), a D1 protein of photosystem II, a mono-oxygenase, a cytochrome P450, a cellulose synthase, a beta-tubulin, and a serine hydroxymethyltransferase.
5. The method of claim 4, further comprising applying onto said weed or volunteer plant a quantity of a herbicide for which said protein provides resistance.
6. The method of claim 1, wherein the targeted herbicide-resistant weeds or volunteer plants are growing in a field of herbicide-resistant crop plants.
7. The method of claim 6, wherein the crop plants are corn, soybean, cotton, canola, sugar beet, alfalfa, sugarcane, rice, wheat, fruit or vegetables.
8. The method of claim 1, wherein the targeted herbicide-resistant weeds or volunteer plants are resistant to one or more of glyphosate, dicamba and sulfonylurea.
9. The method of claim 1, wherein the endogenous gene is a native gene or a recombinant transgene.
10. The method of claim 1, wherein the polynucleotides are double-stranded RNA, single-stranded DNA, or double-stranded DNA/RNA hybrid polynucleotides.
11. The method of claim 1, wherein the organosilicone surfactant is BREAK-THRU® S 321, BREAK-THRU® S 200, BREAK-THRU® OE 441, BREAK-THRU® S 278, BREAK-THRU® S 243, SILWET L-77®, SILWET® HS 429, SILWET® HS 312, or BREAK-THRU® S 233.
12. The method of claim 1, wherein the cationic lipid is TransIT®.
13. The method of claim 1, comprising applying ammonium sulfate.
14. The method of claim 1, wherein one or more polynucleotides comprise a sequence essentially identical or essentially complementary to at least 18 or more contiguous nucleotides of SEQ ID NOs: 1, 41-52, 232, 233, 285-287, 316, or 317.
15. The method of claim 14, wherein one or more polynucleotides are medium-length polynucleotides having a length of 26-300 nucleotides.
16. The method of claim 15, wherein one or more polynucleotides have a length of 26-60 nucleotides.
17. The method of claim 1, wherein one or more polynucleotides comprise a sequence essentially identical or essentially complementary to nucleotides 14-38, 153-177, 345-369 or 1,105-1,129 of SEQ ID NO: 1.
18. The method of claim 1, wherein one or more polynucleotides comprise a sequence essentially identical or essentially complementary to nucleotides 16-170, 451-722 or 1,109-1328 of SEQ ID NO: 1.
19. The method of claim 1, wherein one or more polynucleotides comprise a sequence essentially identical or essentially complementary to nucleotides 564-588, 566-585, 743-764 or 743-767 of SEQ ID NO: 40.
20. The method of claim 1, wherein one or more polynucleotides comprise a sequence essentially identical or essentially complementary to SEQ ID NOs: 8-11, 63-70, 83-112, 239-275, 279-284 or 318.
21. The method of claim 1, wherein one or more polynucleotides comprise a sequence essentially identical or essentially complementary to at least 18 or more contiguous nucleotides of SEQ ID NO: 71.
22. The method of claim 1, wherein one or more polynucleotides comprise a sequence essentially identical or essentially complementary to SEQ ID NOs: 73 or 74.
23. The method of claim 1, wherein one or more polynucleotides comprise a sequence essentially identical or essentially complementary to SEQ ID NOs: 113 or 114.
24. The method of claim 1, wherein one or more polynucleotides comprise a sequence essentially identical or essentially complementary to at least 18 or more contiguous nucleotides of one or more of SEQ ID NOs: 225-229.
25. The method of claim 1, wherein one or more polynucleotides comprise a sequence essentially identical or essentially complementary to at least 18 or more contiguous nucleotides of SEQ ID NOs: 230 or 231.
26. The method of claim 1, wherein one or more polynucleotides comprise a sequence essentially identical or essentially complementary to at least 18 or more contiguous nucleotides of SEQ ID NO: 235.
27. The method of claim 1, wherein one or more polynucleotides comprise a sequence essentially identical or essentially complementary to at least 18 or more contiguous nucleotides of SEQ ID NO: 236.
28. The method of claim 1, wherein one or more polynucleotides comprise a sequence essentially identical or essentially complementary to at least 18 or more contiguous nucleotides of SEQ ID NO: 238.
29. The method of claim 1, wherein one or more polynucleotides comprise a sequence essentially identical or essentially complementary to at least 18 or more contiguous nucleotides of one or more of SEQ ID NOs: 296-299.
30. The method of claim 1, wherein one or more polynucleotides comprise a sequence essentially identical or essentially complementary to at least 18 or more contiguous nucleotides of SEQ ID NO: 2, 37, 53, 59 or 237.

CROSS-REFERENCE TO RELATED APPLICATIONS AND INCORPORATION OF SEQUENCE LISTING

This application claims the benefit of priority of U.S. Provisional Patent Applications 61/311,762 filed 8 Mar. 2010, 61/349,807 filed 28 May 2010, and 61/381,556 filed 10 Sep. 2010, which are incorporated by reference in their entirety herein. The sequence listing that is contained in the file named “38-21—56855_D.txt”, which is 133 kilobytes (measured in operating system MS-Windows) and was created on 7 Mar. 2011, is filed herewith and incorporated herein by reference.

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Related Publications (1)

	Number	Date	Country
	20110296556 A1	Dec 2011	US

Provisional Applications (3)

Number	Date	Country
61311762	Mar 2010	US
61349807	May 2010	US
61381556	Sep 2010	US

Method for controlling herbicide-resistant plants

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