Polyphenol in industrial production

 

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IDENTIFICATION OF GENES INVOLVED IN THE BIOSYNTHESIS OF FLAVONOIDS IN GRAPES

Proanthocyanidins (PAs) are a class of plant flavonoids that are formed as a result of plant secondary metabolism. Molecular aspects of the biosynthesis of PAs have been studied by French scientists at INRA.

Research concerning the accumulation of flavonoids has identified various genes that are involved in the biosynthesis of PAs. Several samples that differ in PA amount have been compared in eight developmental stages of grape berry. It was found that among the 14,000 genes already identified in grape, 2,200 could be involved in PA synthesis. Further results and conclusions are underway to identify which of these genes are most important in regulating the formation of PAs in plants.

Flavonoids play an important part in plant defence and are know to have beneficial effects on human health. In addition, PAs contribute to the astringency and taste of many fruits and plant products for example to those of fruit juice, tea and wine. Therefore, understanding the mechanisms that lead to the formation of these compounds and how they are regulated within the plant are of importance from both health and taste perspectives.

For more information contact:
Nancy Terrier
INRA, France

 

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