Developmental changes of procyanidins in grapes of red Vitis vinifera varieties and their composition in respective wines

• Tipo: Artigo em Revista Científica Internacional
• Data: 2000

Autores

Victor de Freitas (Autor) FCUP; Glories, Y (Autor) Outra; Monique, A (Autor) Outra

Revista

Título: American Journal of Enology and Viticulture

Vol. 51 Nº 2

Páginas: 397-403

ISSN: 0002-9254

Editora: American Society for Enology and Viticulture

Indexação

ISI Web of Knowledge - 77 Citações

Scopus - 92 Citações

Outras Informações

ID Authenticus: P-001-13P

Abstract (EN): Merlot and Cabernet Sauvignon grapes were sampled during the growing season until harvest. The content of catechins ((+)-catechin, (-)-epicatechin and (-)-epicatechin gallate, procyanidin dimers B1 to B8, and trimer C1) in the seeds and skin were determined. Procyanidin concentrations were found to be higher at veraison, then decreased, and remained relatively constant near harvest time. In general, Cabernet Sauvignon were richer in low molecular weight procyanidins than Merlot. Knowing that the dimer B4 is found only in grape seeds, and that dimer B2 is derived from both skin and seeds, it was possible to estimate the contribution of skin and seeds polyphenols to the total tannins in wines. At the end of vinification, the contribution of polyphenols extracted from grape seeds was found to be greater in Cabernet Sauvignon than in Merlot wines.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7