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Light‐Induced Hg Volatilization and O 2 Evolution in Chlorella and the Effect of DCMU and Methylamine
Author(s) -
BENBASSAT D.,
MAYER A. M.
Publication year - 1978
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1978.tb01534.x
Subject(s) - dcmu , methylamine , volatilisation , chemistry , urea , chlorella , photochemistry , nuclear chemistry , photosynthesis , biochemistry , photosystem ii , biology , algae , botany , organic chemistry
The rate of volatilization of Hg 2+ 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 Hg 2+ , O 2 evolution by the cells was not completely inhibited by DCMU. Hg 2+ 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 Hg 2+ to Hg°.