PubAg

Main content area

Proteome changes in Garnacha Tintorera red grapes during post-harvest drying

Author:
Briz-Cid, Noelia, Pose-Juan, Eva, Rial-Otero, Raquel, Simal-Gándara, Jesús
Source:
Lebensmittel-Wissenschaft + [i.e. und] Technologie 2016 v.69 pp. 608-613
ISSN:
0023-6438
Subject:
Vitis vinifera, cell walls, drying, enzymes, gene overexpression, grapes, metabolites, polyphenols, proteins, proteome, wine quality, wines
Abstract:
Fruit raisining is accompanied by changes in composition due to the joint action of water loss and modifying enzymes. Cell walls in grape berries form a barrier against diffusion of aromatic and polyphenolic compounds that influence wine quality. In this work, fresh and post-harvest dried grape samples of Vitis vinifera L. Garnacha Tintorera variety were compared in terms of proteome. The main change observed during raisining was over-expression from 14 to 47% of proteins involved in pathogen- and stress-resistance mechanisms, whereas metabolism-related proteins or those involved in the transcription and synthesis of other proteins decreased, respectively, from 43 to 27% and from 29 to 13%. These changes are important in the functional qualities and stability of the sweet wines obtained, since affect interactions with other macromolecules or metabolites.