Original research articles

Global survey of the microbial ecosystem during alcoholic fermentation in winemaking

Abstract

The alcoholic fermentation is a crucial winemaking step. Its failure is problematic. In spite of several studies to understand and elucidate these problems wine global microbial ecology has never been considered. Using conventional microbiological methods and sensitive molecular tools we monitored the alcoholic fermentations of different red grape varieties in several cellars located in Bordeaux area. These observations were made during three successive vintages in different oenological conditions. The effect of the addition of commercial active dried yeast and of initial cold maceration was studied. All these factors were compiled and their effects on microbial changes were investigated. Some of them acted directly on the microbial population of berries surface at the harvest time and should have impact on alcoholic fermentation. They could modify the microbial changes which in some cases could lead to sluggish fermentation. In these cases, we focused on the Brettanomyces bruxellensis spoilage problem. The risk of further contamination was discussed according to the alcoholic fermentation development.

Download article

References

Authors


Vincent Renouf

Affiliation : Chêne & Cie, structure de R&D de la tonnellerie Taransaud. ZAC de la Garosse, 250 rue des droits de l’Homme, 33240 Saint-André de Cubzac

vincentrenouf@yahoo.fr

Marie-Claire Perello

Affiliation : UMR 1219 OEnologie, Université de Bordeaux, INRA, ISVV, Faculté d'OEnologie, 351 cours de la Libération, 33405 Talence, France


Pierre Strehaiano

Affiliation : Laboratoire de Génie Chimique (UMR CNRS 5503), 4, allée Emile Monso, 31432 Toulouse, France


Aline Lonvaud-Funel

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