久效磷对扁藻的生理效应  

Physiological effect of monocrotophos on Platymonas sp.

作　　者：唐学玺[1] 李永棋[1] 谢荣[1] 

机构地区：[1]青岛海洋大学生命学院,青岛266003

出　　处：《海洋环境科学》1999年第1期6-8,共3页Marine Environmental Science

摘　　要：运用急性毒性实验和生化分析方法对久效磷胁迫下扁藻细胞的生理变化进行了研究。结果表明：（１）久好磷对扁藻的生长有较强的抑制作用，其７２ｈ半抑制剂量为１．４６ｍｇ／Ｌ；（２）久效磷胁迫下，扁藻细胞的３种大分子物质──蛋白质、ＤＮＡ和ＲＮＡ的含量降低；（３）久效磷引起扁藻叶绿素ａ的降解和光合速率的下降。这说明久效磷处理抑制了扁藻细胞的生理代谢。The physiological changes of Platymonas sp. were studied under monocrotophos stresswith an acute toxic experiment and biochemistry methods. The results showed that (1) monocro-tophos could heavily inhibit the growth of algal cells, the 72 h ·EC50 was 1.46 mg/L;(2) theprotein, DNA and RNA content in the algal cell decreased under monocrotophos stress; (3)monocrotophos resulted in the degradation of chlorophyll-a and the decrease of photosynthesisrate. It indicated that the physiological metablism of Platymonas sp. was inhibited by monocro-tophos .

关 键 词：久效磷 光合速率 生理效应 扁藻 海洋污染 

分 类 号：X550.322[环境科学与工程—环境工程]