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Engineered gray mold resistance, antioxidant capacity, and pigmentation in betalain-producing crops and ornamentals
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Engineered gray mold resistance, antioxidant capacity, and pigmentation in betalain-producing crops and ornamentals
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Journal Article
Engineered gray mold resistance, antioxidant capacity, and pigmentation in betalain-producing crops and ornamentals
2017
Overview
Betalains are tyrosine-derived red-violet and yellow plant pigments known for their antioxidant activity, health-promoting properties, and wide use as food colorants and dietary supplements. By coexpressing three genes of the recently elucidated betalain biosynthetic pathway, we demonstrate the heterologous production of these pigments in a variety of plants, including three major food crops: tomato, potato, and eggplant, and the economically important ornamental petunia. Combinatorial expression of betalain-related genes also allowed the engineering of tobacco plants and cell cultures to produce a palette of unique colors. Furthermore, betalain-producing tobacco plants exhibited significantly increased resistance toward gray mold (Botrytis cinerea), a pathogen responsible for major losses in agricultural produce. Heterologous production of betalains is thus anticipated to enable biofortification of essential foods, development of new ornamental varieties, and innovative sources for commercial betalain production, as well as utilization of these pigments in crop protection.
Publisher
National Academy of Sciences
Subject
/ Biosynthetic Pathways - genetics
/ Color
/ Crops
/ Crops, Agricultural - genetics
/ Crops, Agricultural - metabolism
/ Crops, Agricultural - microbiology
/ Disease Resistance - genetics
/ Food
/ Genes
/ Mold
/ Pigments
/ Plant Diseases - microbiology
/ Plants, Genetically Modified
/ Solanum lycopersicum - genetics
/ Solanum lycopersicum - metabolism
/ Solanum lycopersicum - microbiology
/ Solanum melongena - genetics
/ Solanum melongena - metabolism
/ Solanum melongena - microbiology
/ Solanum tuberosum - genetics
/ Solanum tuberosum - metabolism
/ Solanum tuberosum - microbiology
/ Studies
/ Tobacco
/ Tomatoes
/ Tyrosine
