title: Composition and Tissue-Specific Distribution of Stilbenoids in Grape Canes Are Affected by Downy Mildew Pressure in the Vineyard.
abstract: 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.
authors.affiliation: Biomolécules et Biotechnologies Végétales, EA 2106, Université François-Rabelais de Tours , F-37200 Tours, France.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Houillé
authors.affiliation: Biomolécules et Biotechnologies Végétales, EA 2106, Université François-Rabelais de Tours , F-37200 Tours, France.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Besseau
authors.affiliation: Institut Français de la Vigne et du Vin, Tours , F-37400 Amboise, France.
authors.forename: Guillaume
authors.initials: G
authors.lastname: Delanoue
authors.affiliation: Biomolécules et Biotechnologies Végétales, EA 2106, Université François-Rabelais de Tours , F-37200 Tours, France.
authors.forename: Audrey
authors.initials: A
authors.lastname: Oudin
authors.affiliation: Biomolécules et Biotechnologies Végétales, EA 2106, Université François-Rabelais de Tours , F-37200 Tours, France.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Papon
authors.affiliation: Biomolécules et Biotechnologies Végétales, EA 2106, Université François-Rabelais de Tours , F-37200 Tours, France.
authors.forename: Marc
authors.initials: M
authors.lastname: Clastre
authors.affiliation: Department of Biological Sciences, University of Essex , Wivenhoe Park, Colchester, United Kingdom.
authors.forename: Andrew John
authors.initials: AJ
authors.lastname: Simkin
authors.affiliation: Institut Français de la Vigne et du Vin, Tours , F-37400 Amboise, France.
authors.forename: Laurence
authors.initials: L
authors.lastname: Guérin
authors.affiliation: Biomolécules et Biotechnologies Végétales, EA 2106, Université François-Rabelais de Tours , F-37200 Tours, France.
authors.forename: Vincent
authors.initials: V
authors.lastname: Courdavault
authors.affiliation: Biomolécules et Biotechnologies Végétales, EA 2106, Université François-Rabelais de Tours , F-37200 Tours, France.
authors.forename: Nathalie
authors.initials: N
authors.lastname: Giglioli-Guivarc'h
authors.affiliation: Biomolécules et Biotechnologies Végétales, EA 2106, Université François-Rabelais de Tours , F-37200 Tours, France.
authors.forename: Arnaud
authors.initials: A
authors.lastname: Lanoue
mesh_terms: D010935:Plant Diseases / Q000382:microbiology*; D010936:Plant Extracts / Q000737:chemistry* / Q000378:metabolism; D012621:Seasons; D013267:Stilbenes / Q000737:chemistry* / Q000378:metabolism; D027843:Vitis / Q000737:chemistry* / Q000378:metabolism / Q000382:microbiology
chemical_list: D010936:Plant Extracts; D013267:Stilbenes
keywords: downy mildew; grape canes; stilbenoids; tissue distribution