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

Houillé, Benjamin and Besseau, Sébastien and Delanoue, Guillaume and Oudin, Audrey and Papon, Nicolas and Clastre, Marc and Simkin, Andrew John and Guérin, Laurence and Courdavault, Vincent and Giglioli-Guivarc’h, Nathalie and Lanoue, Arnaud (2015) 'Composition and Tissue-Specific Distribution of Stilbenoids in Grape Canes Are Affected by Downy Mildew Pressure in the Vineyard.' Journal of Agricultural and Food Chemistry, 63 (38). pp. 8472-8477. ISSN 0021-8561

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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-ε-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-ε-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.

Item Type: Article
Uncontrolled Keywords: grape canes; stilbenoids; downy mildew; tissue distribution
Subjects: Q Science > QH Natural history > QH301 Biology
Divisions: Faculty of Science and Health
Faculty of Science and Health > Life Sciences, School of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 30 Oct 2015 10:46
Last Modified: 18 Aug 2022 11:16

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