Diferencias en el perfil fenólico del hollejo entre dos variedades tintas de "vitis vinifera", Tempranillo y Garnacha, y sus correspondientes variantes blancas
- María Angeles del Castillo Alonso
- Laura Monforte
- Gonzalo Soriano
- Rafael Tomás-Las Heras
- Javier Martínez-Abaigar
- Encarnación Núñez-Olivera
ISSN: 0213-4306
Year of publication: 2017
Issue Title: Vid y vino
Issue: 29
Pages: 25-40
Type: Article
More publications in: Zubía
Abstract
Phenolic composition of berry skins of four grapevine varieties (Garnacha tinta, Garnacha blanca, Tempranillo and Tempranillo blanco) cultivated in Logroño (La Rioja, Spain), differed in the following characteristics: 1) berry skins of white varieties lacked anthocyanins; 2) flavonols, especially trihydroxylated ones, were higher in red than in white varieties, and they also prevailed in every variety except Garnacha blanca, where cinnamic acids predominated; 3) Tempranillo showed higher stilbene and lower cinnamic acids contents than Tempranillo blanco, but these differences were not found between the two Garnacha varieties; and 4) Tempranillo showed the highest content of total phenolics. Thus, the somatic mutations causing the transition from red to white varieties produced some identical changes in the two white varieties, but each white variety was more related to its corresponding original red variety than to the other white variety. In conclusion, the phenolic profiles of the four varieties studied were very differentiated.