C. AUBERT* , R. BAUMES**, Z. GÜNATA**, J.P. LEPOUTRE**, J.F. COOPER*** et C. BAYONOVE**
*Centre Technique Interprofessionnel des Fruits et Légumes, Route de Mollégès,
13210 Saint Rémy de Provence (France).
**Institut Supérieur de la Vigne et du Vin, INRA-IPV, 2 place Viala, 34060 Montpellier Cedex 1 (France)
***Laboratoire de Chimie Analytique, Faculté de Pharmacie,
Avenue Charles Flahault, 34060 Montpellier cedex (France)
Abstract : Vines from Muscat of Alexandria cultivar were subjected to flusilazole treatments, a sterol biosynthesis inhibitor fungicide (SBI), over 2 years. Effects of these treatments on the corresponding wines were assessed by analyzing the free and bound aroma fractions using selective retention on Amberlite XAD-2 and gas chromatography-mass spectrometry. Quantitative changes in the composition of the free and bound fractions of the treated wines were observed. Levels of varietal, prefermentative and fermentative compounds were modified and a regulatory mechanism for sterol synthesis in yeast involving the monoterpenes could be hypothesized.
Keywords : wine, aroma, flusilazole, fungicide, SBI.