Cr^6+对红树蚬摄食率及其抗氧化酶活性的影响  

Effects of Cr^6+on Ingestion Rate and Activitiesof Antioxidant Enzymes of Polymesoda erosa

作　　者：张程凯 黄勃[1] 逯峰 郭云鹏 程遂 Zhang Chengkai;Huang Bo;Lu Feng;Guo Yunpeng;Cheng Sui(College of Marine Sciences,Hainan University,Haikou 570228,China)

机构地区：[1]海南大学海洋学院,海南海口570228

出　　处：《海南大学学报（自然科学版）》2020年第3期240-246,共7页Natural Science Journal of Hainan University

基　　金：海南红树林生物资源调查(2017FY100703)。

摘　　要：通过毒性胁迫实验,研究了不同质量浓度六价铬(Cr^6+)对红树蚬摄食率及其鳃组织中两种抗氧化物(SOD、CAT)活力的影响,测定了其在不同Cr^6+质量浓度胁迫下的摄食率及其鳃组织中两种酶活性的变化,并对实验数据进行了差异性分析.实验结果显示,不同质量浓度的Cr^6+对红树蚬摄食率的影响具有很大的差异,但总趋势相同,且随着实验时间的增加,红树蚬的摄食率呈下降趋势,Cr^6+质量浓度越高,红树蚬的摄食率下降越明显.红树蚬鳃组织的SOD和CAT活性变化较为相似,随着实验的进行,SOD和CAT都呈现先增加后降低的趋势,Cr^6+质量浓度越高,SOD与CAT的活性下降越明显,且SOD对重金属的响应速度快于CAT对重金属的响应速度.本实验结果可为铬离子污染的生态风险评价提供理论依据,也可为预防贝类铬中毒及建立相关的分子毒理学指标提供基础的数据资料.In the report,the effects of different concentrations of Cr^6+on the ingestion rate and the activities of two antioxidants(SOD and CAT)in the gill of Polymesoda erosa were analyzed,and the toxicity test was used to determine the changes of ingestion rate and two enzymes activities in gill tissue under different concentration gradients Cr^6+stress.The results showed that the effects of different concentrations of Cr^6+on the ingestion rate of P.erosa were significantly different,however,the general trend was same.With the increase of experimental time,the ingestion rate of P.erosa decreased,and the higher the concentration of Cr^6+was,the lower the ingestion rates of P.erosa was.The changes of SOD and CAT activities in the gill tissues of P.erosa were similar.With the experiment proceeding,both SOD and CAT activities increased firstly,and then,decreased.The higher the Cr^6+concentration was,the more obvious the decrease of SOD and CAT activities was,and the response speed of SOD to heavy metals was faster than that of CAT.Our findings can provide theoretical basis for the ecological risk assessment of chromium pollution,and also provide basic data for the prevention of shellfish chromium poisoning and the establishment of related molecular toxicology indicators.

关 键 词：CR^6+ 红树蚬 摄食率 CAT SOD 

分 类 号：S917.4[农业科学—水产科学]