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《JOURNAL OF WUHAN BOTANICAL RESEARCH》 1999-03
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EFFECTS OF Cd 2+ ,Hg 2+ ON GROWTH AND ACTIVITY OF SUPEROXIDE DISMUTASE AND PEROXIDASE IN TRAPA BISPINOSA ROXB.SEEDLINGS

Li Dahui Shi Guoxin Ding Xiaoyu Zhou Changfang Xie Kaibin Chang Fuchen (Department of Biology,Nanjing Normal University Nanjing 210097)  
Treating the Seedling of Trapa bispinosa using different concentrations of Cd 2+ and Hg 2+ ,the effects of Cd 2+ and Hg 2+ on growth and activity of superoxide dismutase (SOD) and peroxidase (POD) in the species were studied.All treatments with different concentrations Cd 2+ 、Hg 2+ can inhibit growth and reduce chlorophyll content of T.bispinosa seedlings,but the inhibition of Cd 2+ are more significant than that of Hg 2+ .Effects of Cd 2+ and Hg 2+ on activity of SOD and POD are different:treatment with Cd 2+ can initially induce the activity of SOD and POD to rise,but with extending time and increasing concentration,the activity declines sharply;while activity of SOD and POD treated with Hg 2+ relatively changes smoothly,in which activity of POD treated with 5 μmol/L and 10 μmol/L Hg 2+ rises continually.Experimental results indicate that toxicity of Cd 2+ on T.bispinosa seedlings is heavier than that of Hg 2+ under the same treating time and concentration.According to the results,authors try to inquire into the toxicity mechanism of heavy metal on plants.
【Fund】: 国家自然科学基金 江苏省自然科学基金
【CateGory Index】: Q945.14
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