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- Title
Altered leaf colour is associated with increased superoxide-scavenging activity in aureusidin-producing transgenic plants.
- Authors
Shakya, Roshani; Ye, Jingsong; Rommens, Caius M.
- Abstract
The health-promoting property of diets rich in fruits and vegetables is based, in part, on the additive and synergistic effects of multiple antioxidants. In an attempt to further enhance food quality, we introduced into crops the capability to synthesize a yellow antioxidant, aureusidin, that is normally produced only by some ornamental plants. For this purpose, the snapdragon ( Antirrhinum majus) chalcone 4′- O-glucosyltransferase ( Am4'CGT) and aureusidin synthase ( AmAs1) genes, which catalyse the synthesis of aureusidin from chalcone, were expressed in tobacco ( Nicotiana tabacum) and lettuce ( Lactuca sativa) plants that displayed a functionally active chalcone/flavanone biosynthetic pathway. Leaves of the resulting transgenic plants developed a yellow hue and displayed higher superoxide dismutase (SOD) inhibiting and oxygen radical absorbance capacity (ORAC) activities than control leaves. Our results suggest that the nutritional qualities of leafy vegetables can be enhanced through the introduction of aurone biosynthetic pathways.
- Subjects
LEAF color; SUPEROXIDES; TRANSGENIC plants; FRUIT in human nutrition; ANTIOXIDANTS; FREE radical scavengers; VEGETABLES in human nutrition
- Publication
Plant Biotechnology Journal, 2012, Vol 10, Issue 9, p1046
- ISSN
1467-7644
- Publication type
Article
- DOI
10.1111/j.1467-7652.2012.00732.x