Hg^(2+)对细叶蜈蚣草的毒害效应  

TOXOLOGICAL EFFECTS OF Hg^(2+) POLLUTION ON EGERIA NAJAS

作　　者：沈盎绿[1] 姚维志[1] 罗红波[1] 

机构地区：[1]西南农业大学水产学院,重庆400716

出　　处：《西南农业大学学报（自然科学版）》2004年第2期223-226,共4页Journal of Southwest Agricultural University

基　　金：重庆市科委应用基础项目资助(200217)

摘　　要：研究了不同浓度Hg2+对细叶蜈蚣草(Egerianajas)叶绿素(Chl)、超氧化物歧化酶(SOD)和过氧氢酶(CAT)的分子毒理学效应。试验结果表明,一定浓度Hg2+可以抑制细叶蜈蚣草CAT和SOD的酶活性,从而破坏其抗氧化防御系统,Hg2+对细叶蜈蚣草生化毒理的影响存在剂量/效应关系。建议可以用细叶蜈蚣草的CAT活性变化作为水环境监测的一项指标。Physiological and biochemical effects of Hg^(2+) of Egeria najas were tested. The results showed that Hg^(2+) above a certain concentration could inhibit the activity of SOD and CAT of E. najas , thus injuring its antioxidant defense system. A positive correlation existed between dose and effect. It is concluded from the above results that variation in CAT activity in E. najas can be used as a biomarker to monitor and evaluate the aquatic ecosystem.

关 键 词：汞 细叶蜈蚣草 酶活性 

分 类 号：X171.5[环境科学与工程—环境科学]