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

  1. Jiménez-Martí, Elena. 1
  2. Gomar-Alba, M. 1
  3. Palacios, A. 3
  4. Ortiz-Julien, A. 2
  5. Del Olmo, M.-L. 1
  1. 1 Universitat de València
    info

    Universitat de València

    Valencia, España

    ROR https://ror.org/043nxc105

  2. 2 Lallemand SAS, Blagnac Cedex, France
  3. 3 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

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Revista:
Applied Microbiology and Biotechnology

ISSN: 0175-7598

Año de publicación: 2011

Volumen: 89

Número: 5

Páginas: 1551-1561

Tipo: Artículo

DOI: 10.1007/S00253-010-2909-4 PMID: 20941492 SCOPUS: 2-s2.0-79952573397 WoS: WOS:000287199900028 GOOGLE SCHOLAR

Otras publicaciones en: Applied Microbiology and Biotechnology

Resumen

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. © 2010 Springer-Verlag.