Franco, Mario Andrea and Coloru, Gavina Carmina and Manca, Gavina and Giaccio, Mario and Del Signore, Antonella (2001) Level of «cis-» and «trans-» resveratrol and their glucosides as a function of different cultivar of red wines. Journal of Commodity Science, Technology and Quality, Vol. 40 (4), p. 167-188. ISSN 1971-4483. Article.
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Variability of trans- and cis-resveratrol and their glucosides in red wines, coming from 13 different species of vine grown on two parallel plots of land, different for pedo-climatic conditions, during three different vintages, was determined by HPLC. The data obtained were elaborated by multivariate statistical analyses (Principal Component Analysis and Discriminant Analysis). The results showed that trans- and cis-resveratrol are more correlated than transand cis-glucoside, due to the uniformity of vinification treatments. Furthermore, Principal Component Analysis pointed out a good separation among five types of wine (Pinot noir, Malbeck, Gaglioppo, Refosco and Ciliegiolo), coming from the same cultivars, which are also discriminated in the Discriminant Analysis as a function of resveratrol content. This would underline that the cultivar variable, almost for the five above mentioned cultivars, has a higher influence than the other factors in wine characterisation with respect to their content of resveratrol.
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