Cation loss during accumulation of heavy metal cations by Saccharomyces cerevisiae |
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Authors: | Dean Brady John R. Duncan |
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Affiliation: | (1) Department of Biochemistry and Microbiology, Rhodes University, P.O. Box 94, 6140 Grahamstown, R.S.A. |
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Abstract: | Summary Cu2+ accumulation byS. cerevisiae resulted in rapid release of 70% of cellular K+, followed by a slower release of approximately 60% of cellular Mg2+, but little loss of Ca2+. Co2+ was accumulated in smaller quantities and caused a smaller loss of physiological cations than either Cu2+ or Cd2+. Mg2+ release during copper accumulation was maximal at pH 6. Mg2+ release during Cu2+ accumulation increased with temperature and salinity of the suspension. |
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