Applied Microbiology and Biotechnology

, Volume 89, Issue 5, pp 1551–1561

Towards an understanding of the adaptation of wine yeasts to must: relevance of the osmotic stress response

Authors

  • Elena Jiménez-Martí
    • Departament de Bioquímica i Biologia Molecular, Facultat de Ciències BiològiquesUniversitat de València
  • Mercè Gomar-Alba
    • Departament de Bioquímica i Biologia Molecular, Facultat de Ciències BiològiquesUniversitat de València
  • Antonio Palacios
    • Universidad de la Rioja
  • Anne Ortiz-Julien
    • Lallemand SAS
    • Departament de Bioquímica i Biologia Molecular, Facultat de Ciències BiològiquesUniversitat de València
Applied Microbial and Cell Physiology

DOI: 10.1007/s00253-010-2909-4

Cite this article as:
Jiménez-Martí, E., Gomar-Alba, M., Palacios, A. et al. Appl Microbiol Biotechnol (2011) 89: 1551. doi:10.1007/s00253-010-2909-4

Abstract

During the transformation of grape must sugars in ethanol, yeasts belonging to Saccharomyces cerevisiae strains are particularly involved. One of the stress conditions that yeast cells have to cope with during vinification, especially at the time of inoculation into must, is osmotic stress caused by high sugar concentrations. In this work, we compare several laboratory and wine yeast strains in terms of their ability to start growth in must. By means of transcriptomic approaches and the determination of glycerol intracellular content, we propose several clues for yeast strains to adapt to the wine production conditions: the high expression of genes involved in both biosynthetic processes and glycerol biosynthesis, and the appropriate levels of intracellular glycerol. Besides, we demonstrate that the pre-adaptation of the wine yeast strains showing growth problems at the beginning of vinification in a rehydration medium containing 2% or 5% glucose (depending on the yeast strain considered) may increase their vitality when inoculated into high sugar media.

Keywords

Wine yeastsSaccharomyces cerevisiaeOsmotic stressVinificationGlycerolGene expressionVitality

Copyright information

© Springer-Verlag 2010