Effects of the irrigation regimes on grapevine cv. Bobal in a Mediterranean climate: II. Wine, skins, seeds, and grape aromatic composition

This study aims to determine the effects and response irrigation regimes (i) rainfed, (ii) deficit (DI), (iii) full (FI) on wine grape skin, seed aromatic composition of grapevine cv. Bobal. The results show that treatment can modulate some important parameters grapes colour, grapes, with respect rainfed and/or unlimited irrigation. In general, alcohol concentration total acidity wines decreased application water, while berry weight increased. Wine phenolics, anthocyanins increased when water was restricted due effect stress anthocyanins, tannins colour skins seeds. regime did not affect polymeric values, polymerization skin (higher mDP, aMW %G) from irrigated treatments, positively affected must astringency. Some precursors such as benzaldehyde, guaiacol, 4-ethylphenol, 4-vinylphenol, α-ionone, γ-decalactone, syringaldehyde, vainillin in treatments rainfed. Benzanoic acid, 3-hydroxybenzaldehyde octanoic acid content also treatment. These increases favour metabolic pathways enhance specific volatile aromas wines, affecting their sensory quality. overall presented demonstrate role played by modulating Bobal composition.