1. Unité de recherche Œnologie; Univ. Bordeaux; Villenave d'Ornon Cedex France
2. Univ. Bordeaux, Bordeaux Imaging Center; Bordeaux France
3. LALLEMAND SAS; Blagnac France
4. Department of Biochemistry and Biotechnology; University Rovira i Virgili; Tarragona, Catalonia Spain