Document Detail

Profiling of hydroxycinnamoyl tartrates and of acylated anthocyanins in the skin of 34 Vitis vinifera genotypes.
MedLine Citation:
PMID:  22533602     Owner:  NLM     Status:  Publisher    
The diversity of berry skin flavonoids in grape genotypes has been previously widely investigated as concerns major compounds (non-acylated anthocyanins and flavonols), but much less as regards acylated anthocyanins and hydroxycinnamoyl tartrates (HCTs). In this study, the composition of the phenolic fraction of the berry skin (free and acylated anthocyanins, flavonols, and HCTs) was assessed on 34 grapevine genotypes grown in a collection vineyard in North-western Italy. The phenolic fraction was profiled on berries collected in the same vineyard, at the same ripening level across two successive vintages. The anthocyanin, HCT, and flavonol profiles were specific of each genotype and the first two were relatively little affected by the vintage. A wide diversity in the polyphenolic fraction was shown among cultivars. Besides expected discriminatory effects of free anthocyanins and flavonol profiles, Principal Component Analyses allowed a good discrimination of cultivars on the basis of coumaroylated anthocyanins and of the HCT profile. Anthocyanins were mostly acylated by aromatic acids and acylation was independent from the anthocyanin substrate. HCTs were present mostly as coumaroyl and caffeoyl derivatives and no correlation was observed between the same acylation patterns of tartrate and of anthocyanins. We discuss the results of this study in the light of new hypotheses on still unknown biosynthetic steps of phenolic substances, and of the potential use of these substances in discrimination and identification of different grape cultivars in wines.
Alessandra Ferrandino; Andrea Carra; Luca Rolle; Anna Schneider; Andrea Schubert
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-4-26
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  -     ISSN:  1520-5118     ISO Abbreviation:  -     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-4-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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