生态学杂志2013，Vol.32Issue(3)：648-654,7.
铬对中国林蛙蝌蚪生长发育的毒性效应
Toxicity effect of chromium on the growth and development of Rana chensinensis tadpoles
摘要
Abstract
In order to evaluate the acute toxicity of chromium (Cr) on amphibian larvae, the Rana chensiensis tadpoles at the stages 28-29 were exposed to the water contaminated by 30-35 mg · L-1 of Cr(Ⅲ) and 10-45 mg · L-1 of Cr(Ⅵ), with the death rate of the tadpoles and the sublethal concentration (LC50) of Cr (Ⅲ) and Cr(Ⅵ) for 24, 48, 72, and 96 h determined, respectively. Both the Cr(Ⅲ) and the Cr(Ⅵ) had obviously acute toxicity on the tadpoles. The LC50 of Cr(Ⅲ) for 24, 48, 72, and 96 h was 34. 09±l. 06, 33.47±0.65, 32.58±0. 11, and 32.05±0.20 mg · L-1, and the LC50 of Cr(Ⅵ) was 91. 97±5. 32, 51. 19±4.62, 35.79±1.40, and 28. 81 ±1. 87 mg · L-1, respectively. The safe concentration (SC) of Cr(Ⅲ) and Cr(Ⅵ) was 3. 21 ±0.02 and 2. 88±0.19 mg · L-1, respectively. The acute toxicity of Cr(Ⅲ) was from its combination with the skin secretion of the tadpoles, forming a complex compound sticking on the gill chamber, and then, causing the tadpoles dead from breath obstacle; whereas the acute toxicity of the Cr(Ⅵ) was due to its strong oxidizing property, causing the tadpoles skin fester, gill atrophy, and ultimately, the mortality of the tadpoles. The assessment of the sublethal concentrations of Cr (Ⅲ) and Cr (Ⅵ) on the growth and development of R. chensiensis tadpoles showed that Cr was a teratogenic substance which could restrain the growth and development of the tadpoles. This effect also had a dose-effect relationship with the Cr concentrations, but the time cumulative effect was irregular.关键词
铬/中国林蛙蝌蚪/毒性/生长发育Key words
chromium/ Rana chensiensis tadpoles/ toxicity/ growth and development分类
资源环境引用本文复制引用
李勃,王维君,李忻怡,张育辉..铬对中国林蛙蝌蚪生长发育的毒性效应[J].生态学杂志,2013,32(3):648-654,7.基金项目
国家自然科学基金资助项目(30770243)、陕西省科学院重点项目(2010ZD01)和中央高校基本科研项目(GK200902039)资助. （30770243）
