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Effects of leaf removal and applied water on flavonoid accumulation in grapevine (Vitis vinifera L. cv. Merlot) berry in a hot climate

dc.rights.licenseopenen_US
dc.contributor.authorYU, Runze
dc.contributor.authorCOOK, Michael G.
dc.contributor.authorYACCO, Ralph S.
dc.contributor.authorWATRELOT, Aude A.
hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
dc.contributor.authorGAMBETTA, Gregory
ORCID: 0000-0002-8838-5050
IDREF: 225449641
dc.contributor.authorKENNEDY, James A.
dc.contributor.authorKURTURAL, S. Kaan
dc.date.accessioned2020-03-29T15:39:12Z
dc.date.available2020-03-29T15:39:12Z
dc.date.issued2016
dc.identifier.issn0021-8561en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/4033
dc.description.abstractEnThe relationships between variations in grapevine (Vitis vinifera L. cv. Merlot) fruit zone light exposure and water deficits and the resulting berry flavonoid composition were investigated in a hot climate. The experimental design involved application of mechanical leaf removal (control, pre-bloom, post-fruit set) and differing water deficits (sustained deficit irrigation and regulated deficit irrigation). Flavonol and anthocyanin concentrations were measured by C18 reversed-phased HPLC and increased with pre-bloom leaf removal in 2013, but with post-fruit set leaf removal in 2014. Proanthocyanidin isolates were characterized by acid catalysis in the presence of excess phloroglucinol followed by reversed-phase HPLC. Post-fruit set leaf removal increased total proanthocyanidin concentration in both years, whereas no effect was observed with applied water amounts. Mean degree of polymerization of skin proanthocyanidins increased with post-fruit set leaf removal compared to pre-bloom, whereas water deficit had no effect. Conversion yield was greater with post-fruit set leaf removal. Seed proanthocyanidin concentration was rarely affected by applied treatments. The application of post-fruit set leaf removal, regardless of water deficit. increased the proportion of proanthocyanidins derived from the skin, whereas no leaf removal or pre-bloom leaf removal regardless of water deficit increased the proportion of seed-derived proanthocyanidins. The study provides fundamental information to viticulturists and winemakers on how to manage red wine grape low molecular weight phenolics and polymeric proanthocyanidin composition in a hot climate.
dc.language.isoENen_US
dc.subjectVitis Vinifera
dc.subjectDéficit Hydrique
dc.subjectInfluence de l'exposition
dc.subjectEffet de la lumière
dc.subjectViticulture
dc.subjectFlavonoïde
dc.subject.enAnthocyanins
dc.subject.enApplied Water Amount
dc.subject.enFlavanols
dc.subject.enFlavonols
dc.subject.enLeaf Removal
dc.subject.enViticulture Practices
dc.subject.enWater Deficit
dc.title.enEffects of leaf removal and applied water on flavonoid accumulation in grapevine (Vitis vinifera L. cv. Merlot) berry in a hot climate
dc.typeArticle de revueen_US
dc.identifier.doi10.1021/acs.jafc.6b03748en_US
dc.subject.halSciences du Vivant [q-bio]/Biologie végétaleen_US
bordeaux.journalJournal of Agricultural and Food Chemistryen_US
bordeaux.page8118-8127en_US
bordeaux.volume64en_US
bordeaux.hal.laboratoriesEcophysiologie et Génomique Fonctionnelle de la Vigne (EGFV) - UMR 1287en_US
bordeaux.issue43en_US
bordeaux.institutionBordeaux Sciences Agroen_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
hal.identifierhal-02523788
hal.version1
hal.date.transferred2020-03-29T15:39:17Z
hal.exporttrue
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