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《Environmental Science & Technology》 2010-11
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Toxicity of Commercial Penta-BDE and Cd in Soil on Anti-oxidant Defensive Responses of Earthworms

ZHU Shu-zhen1,2,3,ZHU Ling-yan1,2,3,LIU Man1,2,3,CHANG Chun1,2,3 (1.School of Environmental Science and Engineering,Nankai University,Tianjin300071,China;2.Tianjin Key Laboratory of Environmental Remediation and Pollution Control,Tianjin300071,China;3.Key Laboratory of Pollution Process and Environmental Criteria of Ministry of Education,Nankai University,Tianjin300071,China)  
Natural soil test method was used to study the effect of cadmium and DE-71 on enzyme activities of earthworms.Activities of superoxide dismutase (SOD),catalase (CAT)and peroxidase (POD)were measured.Results indicted that the activities of SOD,CAT and POD of the earthworms were affected by Cd2+ and DE-71 at the tested concentrations.In general,DE-71 mainly presented induction effect while Cd2+ at high concentration may inhibit the three enzyme activities.CAT and SOD which were more sensitive than POD could be used as indicators for environmental pollution of PBDEs and Cd2+.When Cd2+ was combined with different concentrations of DE-71,different joint effects were displayed.For SOD,the joint effect was synergetic at early exposure but changed to antagonistic effect at later exposure.Similar trend was observed for CAT when Cd2+ was combined with 10 and 100mg/kg dw DE-71.It was mainly synergetic effect when combined with 400mg/kg dwDE-71.For POD,it was mainly antagonistic effect.In overall,joint effect of Cd2+ and DE-71 on the anti-oxidative system of earthworm was mainly antagonistic effect.
【Fund】: 教育部博士点基金项目(20070055031);; 新世纪人才计划;; 国家自然科学基金(20677032 20637030)
【CateGory Index】: X174
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