一种基于S-甲基的除草剂对两个植物模型的影响:Zea mays L.和Lactuca sativa L
Quenia Maria Silva1, Marcel José Palmieri1, Larissa Fonseca Andrade-Vieira1
1Department of Ecology and Conservation, Natural Science Institute, Federal University of Lavras, Lavras, Brazil.
Journal of toxicology and environmental health. Part A
|June 17, 2024
概括
这项研究发现,基于S-metolachlor的除草剂对生菜和玉米有毒. 这种除草剂显著降低了菜的发芽和生长,并阻碍了玉米的发芽速度,表明了植物毒性.
科学领域:
- 农业科学 农业科学
- 环境毒理学环境毒理学
- 植物科学 植物科学
背景情况:
- 巴西是农药的主要消费国,在玉米种植中广泛使用的除草剂如S-metolachlor.
- 由于除草剂的广泛应用和潜在的环境影响,除草剂的毒性是一个重大问题.
研究的目的:
- 研究一种基于S-甲基的除草剂在生菜 (Lactuca sativa L.) 和玉米 (Zea mays L.) 上的植物毒性和细胞毒性.
- 评估除草剂对种子发芽,发芽速度和模型植物物种细胞过程的影响.
主要方法:
- 生物测试使用商业S-甲基基除草剂溶液对生菜和玉米种子进行.
- 宏观分析评估了发芽和生长,而显微分析检查了菜根尖的细胞周期和染色体变化.
- 测试包括使用蒸水 (负) 和 (阳性) 的对照.
主要成果:
- 除草剂S-metolachlor显著减少了超过50%的菜发芽和超过45%的发芽速度.
- 菜根尖细胞显示,即使在低度下,线粒体指数也显著下降 (从16.25%降至9.28%).
- 玉米的发芽速度没有显著下降,但发芽速度在最高度下降了高达51.22%.
结论:
- 这种基于S-metolachlor的除草剂在生菜和玉米中表现出显著的植物毒性和细胞毒性.
- 这些发现突出了这种除草剂对关键植物生理过程的有害影响,引发了对农业应用的担忧.
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