五溴联苯醚-镉胁迫下蚯蚓抗氧化防御反应  

Toxicity of Commercial Penta-BDE and Cd in Soil on Anti-oxidant Defensive Responses of Earthworms

作　　者：朱淑贞[1,2,3] 祝凌燕[1,2,3] 刘慢[1,2,3] 常春[1,2,3] 

机构地区：[1]南开大学环境科学与工程学院,天津300071 [2]天津市城市生态环境修复与污染防治重点实验室,天津300071 [3]南开大学环境污染过程与基准教育部重点实验室,天津300071

出　　处：《环境科学与技术》2010年第11期10-16,共7页Environmental Science & Technology

基　　金：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)

摘　　要：文章采用自然土壤染毒法,研究了Cd2+和DE-71对蚯蚓体内超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和过氧化物酶(POD)活性的影响。结果表明,两种污染物对蚯蚓的三种酶活性均产生一定的影响,DE-71主要表现为诱导效应,而高浓度的Cd2+则会产生抑制作用,SOD和CAT较POD敏感,对环境污染有很好的指示作用。Cd2+和DE-71复合染毒对抗氧化防御系统产生一定的联合毒性效应,SOD主要由协同转变为拮抗作用;以CAT指示的联合效应则受DE-71染毒浓度的影响,当Cd2+与10和100mg/kg(干重)DE-71复合时,联合毒性作用由协同转变为拮抗,而与400mg/kg(干重)DE-71复合时则呈现协同作用;POD指标下两种污染物间则表现为拮抗作用。总体来说Cd2+与DE-71对蚯蚓的抗氧化防御反应主要表现为拮抗效应。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 b...

关 键 词：DE-71 Cd2+ 蚯蚓 酶活性 

分 类 号：X174[环境科学与工程—环境科学]