双酚A对中国林蛙蝌蚪生长发育的毒性效应Toxicity Effects of Bisphenol A on Growth and Development of Rana chensinensis Tadpoles
牛海岗;王宏元;张育辉;
摘要(Abstract):
为评价双酚A(BPA)对中国林蛙(Rana chensinensis)蝌蚪的急性毒性,将26期的蝌蚪暴露于浓度为2.4×10-5mol·L-1~4.2×10-5mol·L-1BPA的水体中进行急性毒性实验.结果表明,24、48、72、96h蝌蚪的死亡几率(y)与浓度对数(x)的回归方程分别为y=16.915x-4.1157、y=22.11x-6.1905、y=20.766x-5.3871、y=20.715x-5.351;半数致死浓度(LC50)分别为3.47×10-5、3.28×10-5、3.20×10-5、3.16×10-5mol·L-1.安全浓度(SC)为0.88×10-5mol·L-1.为探讨在安全浓度以下BPA对中国林蛙蝌蚪生长发育的影响,将林蛙蝌蚪分别于10-5、10-6、10-7mol·L-1BPA的水体中连续暴露直至完全变态,并设10-8、10-9mol·L-1雌二醇(E2)的阳性对照和空白对照,分别测定并统计蝌蚪发育所需的发育时间、体长和体质量.结果表明,蝌蚪对10-5、10-6、10-7mol·L-1BPA与10-8、10-9mol·L-1E2的效应相似,可延缓林蛙幼体的发育时间,导致体长和体质量降低.推测低浓度BPA抑制蝌蚪生长发育的机制之一是干扰了正常的内分泌活动.
关键词(KeyWords): 双酚A;中国林蛙;蝌蚪;生长发育;毒性
基金项目(Foundation): 国家自然科学基金项目(No.30770243)
作者(Author): 牛海岗;王宏元;张育辉;
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DOI:
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