Pythium induced phenolic compounds in the resistance of Vitis vinifera to Botrytis cinerea

摘要

Grey mold rot in grapevine is caused by a necrotrophic pathogen, Botrytis cinerea. There is an enormous loss in the quality and quantity of grapes in the Burgundian vineyards due to Botrytis infection. Our studies demonstrate that some species of Pythium are capable of inducing disease resistance in grapevine against the grey mold pathogen by accumulating phenolic compounds notably, ellagic, caffeic, gallic, caffeic, o-anisic, 3,4-dihydroxy benzoic and salicyclic acid. This is the first report on Pythium induced accumulation of phenolic compounds in the grapevine challenged by B. cinerea. Phenolic compounds produced in grapevine at different time periods after exposure to Pythium and B. cinerea were quantified and their significant increase in quantity was evaluated by statistical analyses.