Repositori URV

Identifier: TDX:1372

Handle: https://hdl.handle.net/20.500.11797/TDX1372

Authors:
Edo Roca, Maite

Abstract:
For three climatically different years (2006, 2007 and 2008), the impact of vintage, vine vigor and bunch heterogeneity was evaluated on grape and wine composition in early and late terroirs of Carignan and Grenache, which were located in the warm Mediterranean region of Terra Alta. To determine the homogeneity of the bunch ripening, top and bottom half of the bunch were analyzed separately. Berry anthocyanins and seed proanthocyanidins were identified by chromatography. The late terroir provided higher yield and lower concentration of sugars and anthocyanins than the early terroir. In warm year (2007), anthocyanins were more concentrated than in temperate year (2008), but the response of each variety differed according to the vigor. Acylated anthocyanins tended to concentrate in the bottom berries. In temperate year, seeds had high levels of monomeric flavan-3-ol and low polymerization of procyanidins, whereas in warm year the procyanidin levels also depended on the vigor.