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Article

Evolution of Catechins and Oligomeric Procyanidins during Grape Maturation of Castelão Francês and Touriga Francesa

António M. Jordão, Jorge M. Ricardo-da-Silva, Olga Laureano
Am J Enol Vitic. January 2001 52: 230-234; published ahead of print September 01, 2001
António M. Jordão
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Jorge M. Ricardo-da-Silva
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Olga Laureano
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Abstract

Quantitative changes in oligomeric procyanidins [dimeric procyanidins (B1, B2, B3, B4), galloylated dimeric (B1-3-0-gallate, B2-3-0-gallate, and B2-3’-0-gallate), trimeric procyanidins (C1, T2)] and monomers [(+)-catechin and (-)-epicatechin] in seeds, stems, and skins of maturing Castelão Francês and Touriga Francesa (Vitis vinifera L.) grapes were measured using reversed-phase high-perfomance liquid chromatography (HPLC). For skins, only dimeric procyanidins (B1, B3, and B4) were detected during maturation. The level of oligomeric procyanidins from seeds, stems, and skins in both grape cultivars studied decreased during ripening, mainly in the first stages of maturation. (+)-Catechin and (-)-epicatechin from seeds in both grape varieties increased during the first stages of ripening, followed by a strong decrease and stabilization. Procyanidins B4 and B2 were the most abundant individual oligomeric procyanidins from seeds in Castelão Francês and Touriga Francesa, respectively, during maturation, while in the case of stems and skins, B1 was the principal oligomeric procyanidin in both grapes cultivars studied.

  • Grapes
  • procyanidins
  • catechins
  • HPLC
  • maturation
  • seeds
  • stems
  • skins

Acknowledgments: The authors thank José Maria da Fonseca Succs S.A., Azeitão, Portugal, for grapes and for support.

  • Copyright 2001 by the American Society for Enology and Viticulture

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Vol 52 Issue 3

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Evolution of Catechins and Oligomeric Procyanidins during Grape Maturation of Castelão Francês and Touriga Francesa
António M. Jordão, Jorge M. Ricardo-da-Silva, Olga Laureano
Am J Enol Vitic.  January 2001  52: 230-234;  published ahead of print September 01, 2001

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Evolution of Catechins and Oligomeric Procyanidins during Grape Maturation of Castelão Francês and Touriga Francesa
António M. Jordão, Jorge M. Ricardo-da-Silva, Olga Laureano
Am J Enol Vitic.  January 2001  52: 230-234;  published ahead of print September 01, 2001
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