Light-Induced Hg Volatilization and O2 Evolution in Chlorella and the Effect of DCMU and Methylamine |
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| Authors: | D BEN-BASSAT A M MAYER |
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| Institution: | Botany Department, Hebrew University, Jerusalem. Israel |
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| Abstract: | The rate of volatilization of Hg2+ as metallic Hg is accelerated by illumination of Chlorella cells. In the presence of the uncoupler methylamine the rate of volatilization in the light is greatly but transiently increased. DCMU (3-(3,4-dichlorophenyl)-1,1-dimethyl urea) prevented the light response. In the presence of Hg2+, O2 evolution by the cells was not completely inhibited by DCMU. Hg2+ appears to prevent DCMU reaching its binding site. Light seems to increase the amount of or leakage from the cells of a metabolite capable of reducing Hg2+ to Hg°. |
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