Original research articles

Effect of vine nitrogen status on grape aromatic potential: flavor precursors (S-cysteine conjugates), glutathione and phenolic content in Vitis vinifera L. Cv Sauvignon blanc grape juice

Abstract

Vine nitrogen status influence on S-cysteine conjugate precursors of volatile thiols, glutathione and phenolic content of the berries of Vitis vinifera L. cv. Sauvignon blanc have been assessed. Despite an increase in berry weight, the increase in nitrogen supply in the vine leads to higher cysteine precursor levels in grape juice. We also show that a late addition of nitrogen at berry set leads to a lower level of phenolic compounds in white grapes and to higher glutathione levels. Therefore, in white varieties, and particularly Sauvignon blanc, improving the nitrogen supply of the vine clearly increases its aromatic potential. However, an excess of nitrogen supply would increase the grape sensitivity to Botrytis cinerea and therefore decrease its quality.

Authors


Xavier Choné

Affiliation : Consultant viticulture, 5 rue Eugène Delacroix, 33150 Cenon Bordeaux, France


Valérie Lavigne-Cruège

Affiliation : Faculté d'oenologie de Bordeaux, I.S.V.V., UMR OEnologie, 351 cours de la Libération, 33405 Talence cedex, France


Takatoshi Tominaga

Affiliation : Faculté d'oenologie de Bordeaux, I.S.V.V., UMR OEnologie, 351 cours de la Libération, 33405 Talence cedex, France


Cornelis van Leeuwen

Affiliation : Bordeaux Sciences Agro, Institut des Sciences de la Vigne et du Vin (ISVV), Ecophysiology and Functional Genomics of the Vine (EGFV), UMR 1287, 33140 Villenave d’Ornon, France

k-van-leeuwen@enitab.fr

Caroline Castagnède

Affiliation : ENITA de Bordeaux, 1 cours du Général de Gaulle, CS 40201, 33175 Gradignan cedex, France


Cédric Saucier

Affiliation : Faculté d’oenologie de Bordeaux, 351 cours de la Libération, 33405 Talence cedex, France


Denis Dubourdieu

Affiliation : Faculté d’oenologie, UMR 1219 OEnologie, Université de Bordeaux, ISVV, 210, chemin de Leysotte, CS 50008, 33882 Villenave d'Ornon, France

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