This Small Business Innovation Research (SBIR) Phase I project proposes to optimize plant transgenic phage protein-based antibacterial technology. Specifically, this project will refine the methodologies needed to create transgenic tomatoes that express holins, lytic proteins produced by bacteriophages, in the amount needed to kill plant-pathogenic gram negative bacteria. The follow-on work will focus on controlling the most serious bacterial diseases of geranium, citrus, grape and rice.<br/><br/>The commercial application of this project will be in the area of transgenic crops to control a number of very important plant diseases for which limited options currently exist.