Phytotoxicity response of sugar beet (Beta vulgaris L.) seedlings to herbicide fomesafen in soil
文献类型： 外文期刊
作者： Li, Xingfan 1 ; Riaz, Muhammad 3 ; Song, Baiquan 1 ; Liu, Huajun 2 ;
作者机构： 1.Heilongjiang Univ, Coll Adv Agr & Ecol Environm, Natl Sugar Crops Improvement Ctr, Harbin 150080, Peoples R China
2.Xinjiang Acad Agr Sci, Res Inst Econ Crops, Urumqi 830091, Xinjiang, Peoples R China
3.Zhongkai Univ Agr & Engn, Coll Resources & Environm, Guangzhou 510225, Peoples R China
关键词： Herbicide residue; Toxicity; Photosynthetic characteristics; Chlorophyll fluorescence; Oxidative stress
期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：7.129； 五年影响因子：7.284 ）
ISSN： 0147-6513
年卷期： 2022 年 239 卷
页码：
收录情况： SCI
摘要： Fomesafen is the most widely used herbicide in the soybean field. However, there are urgent practical challenges with the long-term persistence of fomesafen in soil and its effects on the subsequent crops in agricultural pro-duction. Therefore, pot experiments were conducted to study the effects of fomesafen residues (0-0.05 mg kg(-1)) on growth, photosynthetic characteristics, and the antioxidant defense system of sugar beet seedlings. The results showed that with the increase of fomesafen residues, the phytotoxicity index increased, while the plant height, leaf area, root length, root volume, and dry weight of sugar beet decreased. Photosynthetic pigment content, net photosynthetic rate (Pn), maximum photosynthetic efficiency (Fv/Fm), and actual photosynthetic efficiency (Y (II)) declined with a dose-dependent manner of fomesafen, but the intercellular CO2 concentration (Ci) and non-photochemical quenching coefficient (NPQ) increased under fomesafen. On the other hand, the residues of fomesafen increased the content of malondialdehyde (MDA) and membrane permeability by aggravating oxidative stress and triggering the activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), and polyphenol oxidase (PPO). In addition, sugar beet seedlings were significantly sensitive to fomesafen as the concentration of fomesafen in the soil was up to 0.025 mg kg(-1). In conclusion, the present study showed that fomesafen residues in the soil could affect the morphophysiology and photosynthetic performance of sugar beet. This study is beneficial for understanding the effects of the herbicide fomesafen residues on non-target crops.
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