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《Journal of Anhui Agricultural Sciences》 2008-14
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Effects of Water Pollution Caused by Hg~(2+)on the Chlorophyll Content and Antioxidase Activity in Spinach Seedlings

WANG Xiao-ping et al(Department of Life Science,Nanjing Xiaozhuang University,Nanjing,Jiangsu 211171)  
[Objective] The research aimed to discuss the relationship between Hg2+ stress and the change of antioxidase in plant.[Method] The spinaches were planted in treatment solutions with Hg2+ concn.at 5,15,25,35 and 45 mg/L to research the effects of Hg2+ stress on the chlorophyll content and the activities of superoxide dismutase(SOD),peroxidase(POD) and catalase(CAT) in spinach seedlings.[Result] As Hg2+ concn.was increased,the chlorophyll content in spinach seedlings showed reducing trend totally and when it was 5 mg/L,the chlorophyll content was biggest,being 0.79 mg/g.As Hg2+ concn.was increased,the activities of SOD,POD and CAT showed first increasing and then decreasing trend and when Hg2+ was 15 mg/L,their activities reached their maximum values,being 95.2 U/ml,0.24 △OD470/(g·min) and 0.11 △OD240/(g·min) resp.[Conclusion] Under the action of adversity environmental factors,the plant could make protective reaction to external bad environment through its own enzyme mechanisms.
【Fund】: 南京晓庄学院重点课程生态学资助
【CateGory Index】: S636.1
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