Effects of Exogenous Organic Chelates on Antioxidant Enzymes in Goldfish (Carassius Auratus L.)under Zn Exposure

摘要：

The chemical specification of trace metals in natural waters has important implications for their biogeochemical behavior.However,the effects of organic chelates with free metal ions on antioxidant systems have been scarcely investigated.This study examined the effects of EDTA complex on antioxidant enzymes of goldfish,such as catalase (CAT) and superoxide dismutase (SOD).In this study,SOD and CAT activity decreased with Zn-EDTA exposures.The decrease of CAT activity,however,was alleviated with the addition of EDTA at higher levels.EDTA could promote zinc toxicity on CAT when exposure level was less than 0.50mg/L,but decreased the toxicity when Zn2+ exposure level was over 0.50mg/L.The results indicate the efficient antioxidant and reactive oxygen species scavenging activity by EDTA against Zn-induced free radicals and oxidative stress.

关键词： Zinc EDTA Carassius auratus antioxidant system

作者: Liu Hui Wang WeiMu

作者单位: Department of Agricultural Engineering,Hohai University,Nanjing,210098,China

会议类型: 国际会议

会议名称: International Conference on Effective Utilization of Agricultural Soil & Water Resources and Protection of Environment and the 4th Annual Academic Conference of Chinese Society of Agricultural Soil and Water Engineering

会议地点: 南京

会议语种:英文

页码: 629-634

在线出版日期: 2006-08-16（万方平台首次上网日期，不代表论文的发表时间）