麝香酮和镉单一与复合污染对金鱼藻的生态毒理效应研究Single and Joint Effects of Musk Ketone and Cadmium on Coontail (Ceratophyllum demersum L.)
张蕾;周启星;孙福红;杨传杰;
摘要(Abstract):
为从生物化学角度探讨一种新型污染物———麝香酮与镉(Cd)单一和复合污染的生态毒理效应,以金鱼藻(Ceratophyllum demersum L.)为研究对象,分析了不同浓度麝香酮和Cd在水中单一与复合污染对金鱼藻叶片中抗氧化系统酶,包括超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT),脂质过氧化最终产物丙二醛(MDA),可溶性蛋白(SP)和叶绿素含量的影响.结果表明:在单一麝香酮和Cd暴露下,SOD活性第1天均显著降低,而第7天在低浓度污染物的胁迫下呈升高趋势;金鱼藻受麝香酮和Cd胁迫的第1天,POD酶活性分别呈升高和降低趋势;麝香酮浓度为0.05mg·L-1或Cd浓度为0.01mg·L-1时,金鱼藻叶片中的CAT活性变化表现为显著的毒物兴奋作用;用两种污染物单一或复合处理第7天,金鱼藻叶片中的MDA和叶绿素含量可以作为评价麝香酮或/和Cd污染水体环境的敏感指标;SP在这两种污染物胁迫下处于能量及脂蛋白的补偿和应激蛋白的合成两方面的得失平衡过程中,故其含量与处理浓度之间无显著相关关系;复合污染中低浓度的麝香酮和Cd复合对金鱼藻表现为拮抗作用,高浓度的复合表现为相加或协同作用.
关键词(KeyWords): 水污染;人工合成麝香;麝香酮;镉(Cd);抗氧化系统;生物标志物
基金项目(Foundation): 国家自然科学基金项目(No.20777040);; 高等学校科技创新工程重大项目培育资金项目(No.707011);; 中国科学院沈阳应用生态研究所青年人才领域前沿项目和中-俄自然资源与生态环境联合研究中心资助项目
作者(Author): 张蕾;周启星;孙福红;杨传杰;
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DOI:
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