EFFECT OF METAL IONS ON THE SELECTED CHARACTERISTICS OF BAKER´S YEAST SACCHAROMYCES CEREVISIAE.
 
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Pol. J. Food Nutr. Sci. 2001;51(2):11–18
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ABSTRACT
The present study investigated the effect of Ca 2+ , Mg 2+ , Zn 2+ , Mn2+, Co 2+ and Cu 2+ on protein and trehalose synthesis, fermentation activity and biomass yield in two strains of baker´s yeast Saccharomyces cerevisiae cultured on synthetic Rose´s medium. The experiments showed an increase in trehalose content (by 15 - 60 %) and fermentation activity (by 20 - 50 %) in yeast cultured on the medium supplemented with Mg 2+ , Zn 2+ and Mn 2+. Ion pairs, and especially Zn2+ and Mn2+, exerted positive synergistic action on fermentation activity and volume of trehalose synthesis. The addition of Mn 2+ or Zn 2+ (10 - 20 mM) to the medium reduced negative effects of the increased concentrations of Cu 2+ and Co 2+ on the cells of the tested yeast.
ISSN:1230-0322