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Diurnal Temperature Range Compression Hastens Berry Development and Modifies Flavonoid Partitioning in Grapes

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dc.creator Cohen, Seth D.
dc.creator Tarara, Julie M.
dc.creator Kennedy, James A.
dc.date.accessioned 2012-05-10T18:47:21Z
dc.date.issued 2012-03
dc.identifier.citation Cohen, S. D., Tarara, J. M., & Kennedy, J. A. (2012, March). Diurnal temperature range compression hastens berry development and modifies flavonoid partitioning in grapes. American Journal of Enology and Viticulture, 63(1), 112-120. doi:10.5344/ajev.2011.11015 en_US
dc.identifier.uri http://hdl.handle.net/1957/29109
dc.description.abstract Temperatures during the day and night are known to influence grape berry metabolism and resulting composition. In this study, the flavonoid composition of field-grown Vitis vinifera L. cv. Merlot berries was investigated as a function of diurnal temperature range (DTR). The DTR was compressed by cooling berries during the day and heating them at night. Before veraison, there were minor differences in proanthocyanidin (PA) composition in the skins and seeds due to temperature treatments, most notably a decrease in gallate-esterification of seed flavan-3-ols with compressed DTR. Compressing the DTR significantly hastened berry development and the inception of veraison. Treatments imposed after veraison had minimal impact on skin and seed PAs; however, compressed DTRs favored the partitioning of anthocyanins and flavonols toward B-ring di-substitution. Compressing the DTR of grape berries had a consistent effect on berry development and partitioning of flavonoid metabolites while total flavonoid content was not significantly altered. en_US
dc.description.sponsorship This work was funded by the American Vineyard Foundation, the Viticulture Consortium–West, and USDA-ARS CRIS no. 5358-21000-00D. en_US
dc.language.iso en_US en_US
dc.publisher American Society for Enology and Viticulture en_US
dc.relation.ispartofseries American Journal of Enology and Viticulture en_US
dc.relation.ispartofseries Vol. 63 no. 1 en_US
dc.subject Vitis vinifera en_US
dc.subject tannin en_US
dc.subject anthocyanin en_US
dc.subject flavonol en_US
dc.subject phenolic en_US
dc.subject climate en_US
dc.title Diurnal Temperature Range Compression Hastens Berry Development and Modifies Flavonoid Partitioning in Grapes en_US
dc.type Article en_US
dc.identifier.doi 10.5344/ajev.2011.11015


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