洪燕燕;张育辉;

• 1:陕西师范大学生命科学学院

摘要(Abstract)：

为评价辛基酚(OP)对中国林蛙(Rana chensinensis)蝌蚪的急性毒性,将26期蝌蚪暴露在浓度为5.0×10-7～5.0×10-6mol·L-1OP的水体中进行急性毒性实验.结果显示,蝌蚪的死亡率随着OP浓度的升高和暴露时间的延长而增加,24、48、72、96h的半数致死浓度(LC50)分别为3.55×10-6、2.96×10-6、1.90×10-6、1.52×10-6mol·L-1;96h零致死浓度(96hLC0)为9.70×10-7mol·L-1;安全浓度(SC)为1.52×10-7mol·L-1.另外,为探讨SC以下OP对蝌蚪生长发育的影响,将26期蝌蚪连续暴露在1.0×10-7、5.0×10-8、1.0×10-8、1.0×10-9mol·L-1OP的水体中,并设1.0×10-7、1.0×10-8mol·L-1雌二醇(E2)阳性对照及空白对照,直至70%蝌蚪完全变态.在暴露20d、40d和70%蝌蚪完全变态时共3次测量蝌蚪及幼蛙的体长和体重,分别统计70%蝌蚪发育至跗蹠部伸长期、前肢伸出期和完全变态期所需的时间.结果表明,SC以下OP和E2对蝌蚪死亡率的影响不明显,但1.0×10-9～1.0×10-7mol·L-1OP和1.0×10-7、1.0×10-8mol·L-1E2可不同程度地延缓蝌蚪发育时间,降低蝌蚪体长和体重,并导致少数蝌蚪发育畸形.结果说明低浓度OP与E2相似,对蝌蚪生长发育具有抑制作用.

关键词(KeyWords)： 辛基酚;中国林蛙蝌蚪;毒性;生长发育

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(No.30770243)

作者(Author): 洪燕燕;张育辉;

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DOI:

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