1887

Abstract

The marked copper tolerance of has been confirmed as has its ability to grow in solutions of high salinity. The major low molecular weight organic solutes present in were glycerol, erythritol, arabitol, mannitol, sorbitol and trehalose. Of these, glycerol increased significantly during growth in high concentrations of Na or Cu, a 15-fold increase, relative to the control, occurring in concentrations of 0.5 M. Cell K increased with elevated external Na but decreased slightly with elevated external Cu. With high external Cu mycelium maintained a constant level of Cu, with low levels of Na in all treatments. It is concluded that the high concentrations of glycerol induced by high external Na or Cu had a significant osmotic effect, allowing growth in media of high osmolality. The exclusion of ions may have a gratuitous role in the copper tolerance of .

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1984-08-01
2021-08-02
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