欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报

• 研究报告 • 上一篇    下一篇

利用隆线趋光行为评价铬的生物毒性

吴永贵1,2;黄建国2;袁玲2   

  1. 1华南农业大学资源环境学院,广州 510642;2西南农业大学资源环境学院,重庆 400716
  • 收稿日期:2003-11-18 修回日期:2004-02-15 出版日期:2005-01-18

Phototactic behavior of Daphnia carinata as an indicator of chromium biotoxicity

WU Yonggui1,2,HUANG Jianguo1,YUAN Ling1   

  1. 1College of Resources and Environment,South China Agricultural University, Guangzhou 510642,China;2College of Resources and Environment,Southwest Agricultural University,Chongqing 400716,China

  • Received:2003-11-18 Revised:2004-02-15 Online:2005-01-18

摘要: 报道了以隆线单克隆Dc42为生物监测器,利用其趋光行为变化评价铬生物毒性的方法.结果表明,隆线趋光行为抑制率能较好地反映水中铬的污染程度.在重铬酸钾标准毒物溶液中,趋光指数与Cr6+的浓度呈极显著负相关(R2=0.8089,P<0.001),Cr6+浓度的检测下限为0.056 mg·L-1,远低于LC50和EC50,平均精度达到5.46%,说明趋光指数法用于监测化学物质生物毒性灵敏度高、精确可靠.

关键词: 元宝枫, 冲洗法, 水力结构, 参数

Abstract: The study on the phototactic behavior of Daphnia carinata clone Dc42 as an indicator of chromium biotoxicity showed that the phototaxis inhibition ratio (Rpi) of D.carinata could better indicate the chromium status in water.There was a negative linear correlation between phototactic index (Ip) and Cr6+ concentration in standardized K2Cr2O7 solutions (R2=0.8089,P<0.001).The detection limit of Cr6+ by Ip was 0.056 mg·L-1,much lower than that of LC50 or EC50,and the mean precision index for detection reached up to 5.46%,which suggested the sensitivity,precision and reliability of this method in monitoring chemicals biotoxicity.

Key words: Acer truncatum, Flushing method, Hydraulic character