摘要
研究了不同浓度的悬沙处理液对褶牡蛎体内超氧化物歧化酶（SOD）和过氧化氢酶（CAT）的影响。结果表明：在96h内对照组和所有处理组中褶牡蛎均未出现死亡；96h后对照组与各处理组SOD活性值差异极显著（P〈0．01）．在开始阶段的低浓度处理组中褶牡蛎体内SOD表现为下降趋势。8g／L浓度组的SOD活性值最小。之后有小幅上升．并趋于平衡．但总体水平明显低于对照组；96h后褶牡蛎对照组与各处理组CAT活性值差异极显著（P〈0．01），其CAT-浓度值曲线趋势与SOD-浓度值曲线相一致，同样在低浓度明显下降。2g／L浓度组CAT活性值最小。之后有小幅回升，并存在一定的“毒理兴奋”作用，各浓度水平CAT活性均明显低于对照组。因此．悬沙对褶牡蛎的生理生化存在着一定的影响，建议可把褶牡蛎CAT活性变化作为水环境监测的生物指标。从而达到评价水生生态环境的目的。
Effects of various concentrations of suspended silt on superoxide dismutase （SOD） and catalase （CAT） in Crassostrea plicatula were studied. The results showed that the Crassostrea plicatula hadn＇t died until 96 hours. The difference in SOD activities between control group and other testing ones was very significant （P 〈 0.01）. SOD activities in the low concentration group tended to decrease as the concentration rose whilst the least found in the 8 g/L group and thereafter a little rise occurred until keeping stable at level that was clearly lower than that in the control group in general. The difference in CAT activities between the control group and other ones was very significant （P 〈 0.01）, too. CAT activities versus concentrations varied as the same trend as SOD activities versus concentrations did whilst the least found in the 2 g/L group and thereafter a little rise occurred with a certain ＂toxicity excitability＂ being seen. Therefore, some physiological and biochemical responses of Crassostrea plicatula by suspended silt did exist, and the change in CAT activities of Crassostrea plicatula was suggested to use as a bio-indicator for evaluating the aquatic ecosystem. ：
出处
《上海环境科学》
CAS
CSCD
2007年第1期27-30,共4页
Shanghai Environmental Sciences
基金
国家自然科学基金重点项目(编号50339040)资助
长江口航道建设有限公司资助
关键词
悬沙
褶牡蛎
超氧化物歧化酶
过氯化氢酶
生物指标
水生生态环境
Suspended silt Crassostrea plicatula Superoxide dismutase （SOD） Catalase （CAT） Biological indicator Aquatic ecosystem
