Effects Of Zinc Combining With Specific Metal Ions On Ethanol Tolerance Of Yeast Saccharomyces Cerevisiae
INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY(2020)
摘要
The effects of zinc combining with other metal ions on ethanol tolerance of yeast Saccharomyces cerevisiae 1308 and S. cerevisiae BY4741 were studied for the first time. Addition of zinc increased ethanol tolerance of two yeast strains and reached the maximum viability, biomass and ethanol production at 0.1 mM Zn2+. While ethanol tolerance weakened when zinc concentration was greater than 0.5 mM When combined with 0.1 mM Ca2+, 0.001 mM Cu2+ or 0.001 mM Mn2+, the effect of zinc was further enhanced. Addition of 1 mM, 0.01 mM Cu(2+ )or 0.01 mM Mn2+ decreased ethanol tolerance. However, the negative effect could be alleviated by combining with Zn2+. Effect of zinc on ethanol tolerance was also related to concentration and yeast strain. The optimum zinc level for growth and fermentation of yeast depended on kinds and concentration of other ions. (C) 2020 Friends Science Publishers
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关键词
Ethanol tolerance, Interaction, Metal ions, Saccharomyces cerevisiae, Zinc
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