Influencia de la latitud y el grado de maduración en el perfil fenólico de hollejos de "vitis vinifera" cv. Pinot noir
- María Angeles del Castillo Alonso
- Carmen Aragón Chavarri
- Gonzalo Soriano
- Laura Monforte
- Teresa Ruiz Ramírez
- Javier Martínez Abaigar
- Encarnación Núñez Olivera
ISSN: 0213-4306
Datum der Publikation: 2017
Nummer: 35
Seiten: 27-46
Art: Artikel
Andere Publikationen in: Zubía
Zusammenfassung
Berries of Vitis vinifera cv. Pinot Noir were sampled in Jerez de la Frontera (Cádiz) and Logrono (La Rioja), and in three maturity levels. In addition, environmental data related to global and ultraviolet (UV) radiation, temperature and water availability, were collected. In berry skins, the total content of several phenolic groups, the content of 29 individual phenolic compounds and antioxidant capacity were measured. The content of phenolic compounds varied greatly with latitude and its associated environmental factors. Skins in Jerez had higher antioxidant capacity and contents of most of the phenolic groups measured. The radiation doses (both global and UV) received in the 10 days prior to harvest seemed to be the main determinant of these changes. The effect of the maturity level was much lower than that of the latitude, and mainly affected flavonols, which increased with increasing maturity level, in contrast to the flavanols. These results indicate that certain viticultural practices leading to increase sun exposure of berries right before harvest would be useful to promote the synthesis of specific phenolic compounds.