This Small Business Innovation Research (SBIR) Phase I project will demonstrate the technical feasibility of enhancing isoprenoid biosynthesis by mevalonate pathway addition to plastids of a eukaryotic model. Isoprenoids, as carotenoids, serve as natural colorants in plant products and also have a market as human dietary supplement. Increasing the output of carotenoids in cultivated plants and microalgae is of considerable interest as a way to provide these isoprenoids as natural products from renewable sources rather than from chemical synthesis. <br/><br/>The commercial application of this project will be on the aquaculture and the ornamental horticulture industries.