Anhydrobiosis in yeast: influence of calcium and magnesium ions on yeast resistance to dehydration–rehydration

Yuliya Trofimova, Graeme Walker, Alexander Rapoport

    Research output: Contribution to journalArticlepeer-review

    42 Citations (Scopus)

    Abstract

    The influence of calcium and magnesium ions on resistance to dehydration in the yeast, Saccharomyces cerevisiae, was investigated. Magnesium ion availability directly influenced yeast cells' resistance to dehydration and, when additionally supplemented with calcium ions, this provided further significant increase of yeast resistance to dehydration. Gradual rehydration of dry yeast cells in water vapour indicated that both magnesium and calcium may be important for the stabilization of yeast cell membranes. In particular, calcium ions were shown for the first time to increase the resistance of yeast cells to dehydration in stress-sensitive cultures from exponential growth phases. It is concluded that magnesium and calcium ion supplementations in nutrient media may increase the dehydration stress tolerance of S. cerevisiae cells significantly, and this finding is important for the production of active dry yeast preparations for food and fermentation industries.
    Original languageEnglish
    Pages (from-to)55-61
    Number of pages7
    JournalFEMS Microbiology Letters
    Volume308
    Issue number1
    DOIs
    Publication statusPublished - Jul 2010

    Keywords

    • Yeast anhydrobiosis
    • Magnesium
    • Calcium
    • Dehydration-rehydration

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