Phenolic Compounds in Grapes and Wine

Technical Report

Pubblico Deposited

Citeable URL: https://ir.library.oregonstate.edu/concern/technical_reports/3197xn39v

Descriptions

Attribute Name	Values
Creator	Price, Steve Watson, Barney
Abstract	In experiments in grape skin light transmission in 1991, we found that quercetin (a phenolic compound found in many plants) accumulates in sun exposed grape skin. The accumulation of quercetin in grape skins appeared to be a protective response to solar radiation and we were able to show that quercetin effectively screens grape tissue from potentially damaging UV radiation. In this study there were very large differences in quercetin skin concentration between sun exposed and shaded grapes. In Pinot noir, we found eight times more quercetin in sun exposed tissue than in shaded and in Chardonnay the difference was even greater. With this large difference in concentration, it seemed likely that cluster sun exposure could be having specific effects on quercetin levels in wine, and it also seemed likely, given the high concentrations of quercetin in sun-exposed skin, that these differences could be significantly effecting wine quality.
Resource Type	Technical Report
Date Available	2016-02-10T17:56:19+00:00
Date Issued	1994
Academic Affiliation	Horticulture Food Science and Technology
Non-Academic Affiliation	Oregon Wine Research Institute
Series	Oregon Wine Advisory Board Research Progress Report
Dichiarazione dei diritti	In Copyright
Publisher	Oregon Wine Research Institute
Peer Reviewed	No
Language	English [eng]
Replaces	http://hdl.handle.net/1957/58251

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