Effect of chiral differences of metolachlor and its (S)-isomer on their toxicity to earthworms
Effect of chiral differences of metolachlor and its (S)-isomer on their toxicity to earthworms
复制标题
异丙甲草胺及其(S)异构体手性差异对其蚯蚓毒性的影响
DOI：
10.1016/j.ecoenv.2010.07.035
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发表时间：
2010-11-01
影响因子：
6.8
通讯作者：
Wang, Kaixiong
中科院分区：
文献类型：
--
作者：
Xu, Dongmei;Wen, Yuezhong;Wang, Kaixiong
研究了（Rac）-异丙甲草胺和（S）-异丙甲草胺对蚯蚓回避行为、体重变化和体内酶活性的影响。研究了（Rac）-异丙甲草胺对E.在相同浓度下，（S）-异丙甲草胺处理对中华绒螯蟹幼仔的体重和体重的影响显著大于（S）-异丙甲草胺处理。在短期内（2 d、7 d），（S）-异丙甲草胺对E.恶臭。但在相对较长的时间内（14 d、28 d），（Rac）-异丙甲草胺对纤维素酶和过氧化氢酶活性有较高的毒害作用。（Rac）-异丙甲草胺和（S）-异丙甲草胺对E.过氧化氢酶活性最高，纤维素酶活性最低。回避行为试验表明，蚯蚓对（Rac）-异丙甲草胺的刺激比（S）-异丙甲草胺敏感。研究结果将有助于了解这两种除草剂的生物介导的环境过程。(c)2010年爱思唯尔公司All rights reserved.
The effects of (Rac)-metolachlor and (S)-metolachlor on the avoidance behavior, bodyweight change and in vivo enzyme activity of earthworms (Eisenia foetida) were determined and compared in this study. The effects of (Rac)-metolachlor on the enzyme activities of E. foetida and bodyweight were more significant than those of (S)-metolachlor at the same concentrations. In the short term (2 d, 7 d), (S)-metolachlor had faster effects on cellulase and catalase activities of E. foetida. However, in the relatively long term (14 d, 28 d), (Rac)-metolachlor had higher toxic effects on cellulase and catalase activities. The inter-group difference between (Rac)-metolachlor and (S)-metolachlor on E. foetida enzyme activities was the most significant for catalase, and the least significant for cellulase. The test of avoidance behavior shows that earthworms are more sensitive to the stimulation of (Rac)-metolachlor than to that of (S)-metolachlor. The results will help to develop an understanding of the biologically mediated environmental processes of these two herbicides. (c) 2010 Elsevier Inc. All rights reserved.