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Comparative phytotoxicity of Rac-metolachlor and S-metolachlor on rice seedlings

机译:Rac-甲草胺和S-甲草胺对水稻幼苗的比较植物毒性

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摘要

The toxicity of Rac-metolachlor and S-metolachlor on rice (IIYou92, Oryza sativa L.) seedlings was determined and compared in a hydroponics experiment. The elongation of shoot, main root, and the number of lateral roots were inhibited in both Rac- and S-metolachlor treatments. The 96h- IC50 of Rac- and S-metolachlor were 12.32 and 9.44 μM for shoot, and 4.69 and 1.75 μM for root, respectively. The content of chlorophyll a, chlorophyll b and total chlorophyll of leaf treated by Rac-metolachlor was higher than that treated by S-metolachlor. The activities of superoxide dismutase, peroxidase, cytochrome P450 2E1, glutathione S-transferase, and the content of glutathione increased after herbicide exposure, and the activities or the content was higher in the S-metolachlor treatment than in the exposure to Rac-metolachlor. Ultrastructural studies revealed that Rac- and S-metolachlor had adverse effects on leaf cells, and S-metolachlor treatment caused higher damage.
机译:测定了Rac-甲草胺和S-甲草胺对水稻(IIYou92,Oryza sativa L.)幼苗的毒性,并在水培试验中进行了比较。在Rac-和S-异丙甲草胺处理中均抑制了芽的伸长,主根和侧根的数量。 Rac-和异丙甲草胺的96h-IC50分别为12.32和9.44μM的芽,分别为4.69和1.75μM的根。 Rac-异丙甲草胺处理的叶片叶绿素a,叶绿素b和总叶绿素含量高于S-异丙甲草胺处理。暴露于除草剂后,超氧化物歧化酶,过氧化物酶,细胞色素P450 2E1,谷胱甘肽S-转移酶的活性和谷胱甘肽的含量增加,S-异丙甲草胺处理的活性或含量高于暴露于Rac-异丙甲草胺的活性。超微结构研究表明,Rac和S-异丙甲草胺对叶细胞有不利影响,而S-异丙甲草胺处理引起的伤害更高。

著录项

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  • 作者

    Hui J. Liu; Ming Y. Xiong;

  • 作者单位

    School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, People's Republic of China;

    Institute of Environmental Science, Zhejiang University, Hangzhou, People's Republic of China;

    Chemical Safety Evaluation & Research Ce;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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  • 入库时间 2022-08-18 00:57:56

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