Composition and Tissue-Specific Distribution of Stilbenoids in Grape Canes Are Affected by Downy Mildew Pressure in the Vineyard

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• 作者：Benjamin Houill茅 ; S茅bastien Besseau ; Guillaume Delanoue ; Audrey Oudin ; Nicolas Papon ; Marc Clastre ; Andrew John Simkin ; Laurence Gu茅rin ; Vincent Courdavault ; Nathalie Giglioli-Guivarc鈥檋 ; Arnaud Lanoue
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2015
• 出版时间：September 30, 2015
• 年：2015
• 卷：63
• 期：38
• 页码：8472-8477
• 全文大小：409K
• ISSN：1520-5118

文摘

Grape canes are byproducts of viticulture containing valuable bioactive stilbenoids including monomers and oligomers of E-resveratrol. Although effective contents in stilbenoids are known to be highly variable, the determining factors influencing this composition remain poorly understood. As stilbenoids are locally induced defense compounds in response to phytopathogens, this study assessed the impact of downy mildew infection during the growing season on the stilbenoid composition of winter-harvested grape canes. The spatial distribution between pith, conducting tissues, and cortex of E-piceatannol, E-resveratrol, E-蔚-viniferin, ampelopsin A, E-miyabenol C, Z/E-vitisin B, hopeaphenol, and isohopeaphenol in grape canes from infected vineyards was strongly altered. In conducting tissues, representing the main site of stilbenoid accumulation, E-蔚-viniferin content was higher and E-resveratrol content was lower. These findings suppose that the health status in vineyards could modify the composition of stilbenoids in winter-harvested grape canes and subsequently the potential biological properties of the valuable extracts.