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Titre du document / Document title

Proanthocyanidin composition of red Vitis vinifera varieties from the Douro valley during ripening : Influence of cultivation altitude

Auteur(s) / Author(s)

MATEUS Nuno (1) ; MARQUES Sara (1) ; GONCALVES Ana C. (1) ; MACHADO José M. (2) ; DE FREITAS Victor (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Centro de Investigação em Química, Departamento de Química do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, PORTUGAL
(2) Barros, Almeida & Ca, Vinhos S.A., Rua D. Leonor, 180, 4400 Vila Nova de Gala, PORTUGAL

Résumé / Abstract

The effect of altitude and its related climatic conditions on the proanthocyanidin composition of Touriga Nacional and Touriga Francesa varieties during berry maturation is reported for the 1997 vintage. At berry maturation, low altitude is shown to be an important factor favoring the biosynthesis of higher concentrations of grape-skin catechin monomers ((+)-catechin, (-)-epicatechin, (-)-epicatechin gallate), procyanidin dimers, trimer C1, as well as total extractable proanthocyanidins. The grapes (skin and seeds) of Touriga Nacional were found to be richer in low molecular weight flavan-3-ol compounds, while Touriga Francesa contained higher concentrations of total extractable proanthocyanidins. At harvest, grape-skin dimer content was comprised almost entirely of dimer B1, followed by dimers B2 and B3, whereas C4-C8 linked dimers (B1 to B4) and B2-gallate were the most abundant found in seeds. Dimer B2, which was one of the less important dimers at the early stage of development in seeds, showed a tendency to increase during ripening, while its respective gallate ester (B2-gallate) markedly decreased.

Revue / Journal Title

American journal of enology and viticulture    ISSN  0002-9254   CODEN AJEVAC 

Source / Source

2001, vol. 52, no2, pp. 115-121 (37 ref.)

Langue / Language

Anglais

Editeur / Publisher

American Society for Enology and Viticulture, Davis, CA, ETATS-UNIS  (1959) (Revue)

Mots-clés anglais / English Keywords

Ecophysiology

;

Viticulture

;

Enology

;

Altitude

;

Climatic condition

;

Medium effect

;

Chemical composition

;

Berry

;

Grains

;

Vitis vinifera

;

Cultivar

;

Catechin

;

Vegetal tannin

;

Portugal

;

Experimental study

;

Vitidaceae

;

Dicotyledones

;

Angiospermae

;

Spermatophyta

;

Europe

;

Fruit crop

;

Phenols

;

Southern Europe

;

Mediterranean Basin

;

Mots-clés français / French Keywords

Ecophysiologie

;

Viticulture

;

Oenologie

;

Altitude

;

Condition climatique

;

Effet milieu

;

Composition chimique

;

Baie(fruit)

;

Grain

;

Vitis vinifera

;

Cultivar

;

Catéchine

;

Tanin végétal

;

Portugal

;

Etude expérimentale

;

Proanthocyanidine

;

Vitidaceae

;

Dicotyledones

;

Angiospermae

;

Spermatophyta

;

Europe

;

Plante fruitière

;

Phénols

;

Europe Sud

;

Bassin méditerranéen

;

Mots-clés espagnols / Spanish Keywords

Ecofisiología

;

Viticultura

;

Enología

;

Altitud

;

Condición climática

;

Efecto medio

;

Composición química

;

Baya(fruto)

;

Grano

;

Vitis vinifera

;

Cultivar

;

Catequina

;

Tanino vegetal

;

Portugal

;

Estudio experimental

;

Vitidaceae

;

Dicotyledones

;

Angiospermae

;

Spermatophyta

;

Europa

;

Planta frutal

;

Fenoles

;

Europa Sur

;

Cuenca mediterránea

;

Localisation / Location

INIST-CNRS, Cote INIST : 10458, 35400009915811.0060

Nº notice refdoc (ud4) : 1129642



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