Influence of grape maturity and prefermentative cluster treatment of the Grenache cultivar on wine composition and quality

Pascual, Olga; Ortiz, Jeanette; Roel, Maruxa; Kontoudakis, Nikolaos; Gil, Mariona; Gomez-Alonso, Sergio; Garcia-Romero, Esteban; Miquel Canals, Joan; Hermosin-Gutierrez, Isidro; Zamora, Fernando


This work studied how different grape maturity levels and cluster treatments affect the color and phenolic composition of Grenache wines. Specifically, five treatments were undertaken at a microvinification scale for three maturity levels: Control (destemmed and crushed grapes), Whole Berry, Whole Cluster, Crushed Cluster and Submerged Cap. The first three treatments were also reproduced with large-scale wine fermentation in oak barrels but only with well-ripened grapes. The results indicated that the total polyphenol index (TPI), anthocyanin and proanthocyanidin concentrations, as well as the mean degree of polymerization were higher in all the treatments when the grapes were riper. Submerged Cap generated maximum color and polyphenolic extraction at the three maturity levels. Whole Berry wines were the most similar to the controls. The presence of stems (Crushed Cluster and Whole Cluster treatments) produced wines with a significantly higher pH at all maturity levels and with lower color intensity when the grapes were less ripe. The presence of stems also significantly increased the TPI in almost all cases.

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Título según WOS: ID WOS:000393367300001 Not found in local WOS DB
Título de la Revista: OENO One
Volumen: 50
Número: 4
Fecha de publicación: 2016
Página de inicio: 169
Página final: 181


Notas: ISI