Accumulation of magnesium ions during fermentative metabolism in Saccharomyces cerevisiae

Graeme M. Walker, A. Ian Maynard

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

When cells of Saccharomyces cerevisiae were grown aerobically under glucose-repressed conditions, ethanol production displayed a hyperbolic relationship over a limited range of magnesium concentrations up to around 0.5 mM. A similar relationship existed between available Mg2+ and ethanol yield, but over a narrower range of Mg2+ concentrations. Cellular demand for Mg2+ during fermentation was reflected in the accumulation patterns of Mg2+ by yeast cells from the growth medium. Entry of cells into the stationary growth phase and the time of maximum ethanol and minimum sugar concentration correlated with a period of maximum Mg2+ transport by yeast cells. The timing of Mg2+ transport fluxes by S. cerevisiae is potentially useful when conditioning yeast seed inocula prior to alcohol fermentations.
Original languageEnglish
Pages (from-to)1-3
Number of pages3
JournalJournal of Industrial Microbiology and Biotechnology
Volume18
Issue number1
DOIs
Publication statusPublished - Jan 1997

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