Influence of Rootstocks on Changing the Pattern of Phenolic Compounds in Thompson Seedless Grapes and Its Relationship to the Incidence of Powdery Mildew

摘要: The total phenolic content and individual groups of phenols, such as flavonones, flavonoids, flavon-3-ols, were estimated in the leaves berries Thompson Seedless grapes grafted onto different rootstocks own-rooted vines during 3 stages berry development. at all sampling contained more phenol than berries. reduction was gradual from first to third stage sampling, but it drastic Dog ridge, 110 R, 1103 P had highest least on 99 St. George rootstocks, vines. number bunches infested with powdery mildew vines, those R. A significant negative correlation observed between infected by content.