Alleviation of stuck wine fermentations using salt-preconditioned yeast

Stelios Logothetis, Elias T. Nerantzis, Panagiotis Tataridis, Anna Goulioti, Anastasios Kannelis, Graeme M. Walker

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Abstract

The influence of salt (sodium chloride) on the cell physiology of wine yeast was investigated. Cellular viability and population growth of three wine-making yeast strains of Saccharomyces cerevisiae, and two non-Saccharomyces yeast strains associated with wine must microflora (Kluyveromyces thermotolerans and K. marxianus) were evaluated following salt pre-treatments. Yeast cells growing in glucose defined media exposed to different sodium chloride concentrations (4, 6 and 10% w/v) exhibited enhanced viabilities compared with nontreated cultures in subsequent trial fermentations. Salt ‘preconditioning’ of wine yeast seed cultures was also shown to alleviate stuck and sluggish fermentations at the winery scale, indicating potential benefits for industrial fermentation processes. It is hypothesized that salt induces specific osmostress response genes to enable yeast cells to better tolerate the rigours of fermentation, particularly in high sugar and alcohol concentrations.
Original languageEnglish
Pages (from-to)174–182
Number of pages9
JournalJournal of the Institute of Brewing
Volume120
Issue number3
Early online date10 Jun 2014
DOIs
Publication statusPublished - 2014

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Logothetis, S., Nerantzis, E. T., Tataridis, P., Goulioti, A., Kannelis, A., & Walker, G. M. (2014). Alleviation of stuck wine fermentations using salt-preconditioned yeast. Journal of the Institute of Brewing, 120(3), 174–182. https://doi.org/10.1002/jib.143