草甘膦对粉绿狐尾藻生长、光合色素和抗氧化酶系统的影响

Effects of Glyphosate on Growth, Photosynthetic Pigments and Antioxidant Enzyme Systems of Myriophyllum aquaticum

草甘膦是目前世界范围内使用范围最广、用量最大的广谱、灭生性除草剂。因其被大量利用于农业生产中,不仅在土壤中存在残留,同时在水环境中检出率也很高,对水生生态系统带来一定威胁。本研究通过模拟实验,选取水生植物粉绿狐尾藻(Myriophyllum aquaticum)于不同浓度(0, 0.05, 0.1, 0.3 mmol/L)的水环境中培养14天后,测定其生长、光和色素含量以及抗氧化酶活性等指标,以观测水体中草甘膦对粉绿狐尾藻的生态毒理作用,探讨植物在草甘膦胁迫下的耐受能力,为将来水体中草甘膦的生物修复选种提供参考依据。

Glyphosate is currently the most widely used and broad-spectrum herbicide in the world.Because it is widely used in agricultural production,it not only has residues in the soil,but also has a high detection rate in the water environment,which poses a certain threat to the aquatic ecosystem.In this study,the growth,photosynthetic pigments and the activity of antioxidase on Myriophyllum aquaticum were determined after 14 days culture under different concentration of glyphosate(0,0.05,0.1,0.3 mmol/L).We observed the ecotoxicological effects of glyphosate on Myriophyllum aquaticum,explored the tolerance of plants under this stress condition,and provided a reference basis for selecting plant species for bioremediation of glyphosate.