Metabolic responses of Lemna minor to lead ions II. Induction of antioxidant enzymes in roots |
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Authors: | Ma?gorzata Garnczarska Lech Ratajczak |
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Institution: | (1) Department of Plant Physiology, A. Mickiewicz University, Al. Niepodległości 14, 61-713 Poznań, Poland |
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Abstract: | Duckweed Lemna minor L. was grown on Wang culture medium supplemented with lead ions for 24 hours. Metal was tested at 1.5, 3 and 6 mg·dm−3 concentrations. The response of antioxidant enzymes, such as superoxide dismutase, catalase and peroxidase in lead-treated
roots of duckweed was investigated. Lead ions had no effect on the spectrum of catalase and peroxidase isoenzymes while a
new isoform of superoxide dismutase appeared on the Pb treated roots. A lead-depended increase in activities of superoxide
dismutase and peroxidase was observed, whereas catalase activity was maintained at relatively constant values at lower lead
concentrations and then decreased markedly below control level. |
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Keywords: | catalase peroxidase superoxide dismutase lead Lemna minor |
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