Effect of some environmental pollutants on the superoxide dismutase activity in Lemna.
Exposure of Lemna sp. to SO2 resulted in an increased activity of superoxide dismutase. About 3 to 4 fold increase in the activity was observed within 30 minutes after the plants were fumigated with 10 ml/l of SO2. Paraquat, a well known superoxide generator, doubled the enzyme activity after 1 hour of treatment with 0.1 mM paraquat. Superoxide dismutase activity was also enhanced by cadmium treatment but the response was not immediate. Optimum increase in the activity of enzyme was observed after 4 days of treatment with 40 mg/l of cadmium in the medium. Treatment with H2O2 very clearly inhibited the activity of superoxide dismutase in Lemna.
Srivastave
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A
Department of Agricultural Botany, Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot, Israel.
Tel-Or
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E
D002104:Cadmium / Q000494:pharmacology; D004785:Environmental Pollutants / Q000494:pharmacology*; D010084:Oxidation-Reduction; D010269:Paraquat / Q000494:pharmacology; D010944:Plants / Q000187:drug effects* / Q000201:enzymology; D013458:Sulfur Dioxide / Q000494:pharmacology; D013482:Superoxide Dismutase / Q000187:drug effects*
D004785:Environmental Pollutants; D002104:Cadmium; D013458:Sulfur Dioxide; D013482:Superoxide Dismutase; D010269:Paraquat