农药学学报2024，Vol.26Issue(3)：594-603,10.DOI:10.16801/j.issn.1008-7303.2024.0017
呋虫胺对映体在水体沉积物中的选择性蓄积及对微生态系统的影响
Stereoselective accumulation of sinotefuran enantiomers in water sediments and their effects on microecosystem
摘要
Abstract
In recent years,the environmental safety problem of neonicotinoid insecticides has become increasingly prominent.As a representative of the new generation of neonicotinoid insecticides,it is of great significance to fully assess the environmental safety of dinotefuran.In this study,the stereoselective adsorption of dinotefuran in water sediment and its effects on the sediment microecosystem were studied by constructing a water-sediment microcosmic system.The results showed that S-dinotefuran had a stronger adsorption capacity in sediment than R-dinotefuran.During the whole exposure period,both R-dinotefuran and S-dinotefuran caused the decrease of urease activity in the sediment.However,the dehydrogenase and catalase activities in the sediment were significantly enhanced under the exposure treatment of either R-dinotefuran or S-dinotefuran.After 28 d of exposure,both R-dinotefuran and S-dinotefuran resulted in significant increases in the abundance of Bdellovibrionota,Hydrogenophaga and Acinetobacter.Additionally,S-dinotefuran significantly inhibited the abundance of Acidobacteriota,Desulfobacterota and Myxococcota compared with R-dinotefuran.S-dinotefuran had a stronger negative effect on the sediment microbial community,resulting in a decrease in microbial community diversity,and promoted the microbial species interaction.The results indicated that the Clostridium_sensu_stricto genus under the Firmicutes phylum played an important role in the degradation of S-dinotefuran,while the microorganisms under the Actinobacteriota phylum played a major role in the degradation of R-dinotefuran.These results are conducive to the environmental safety evaluation of dinotefuran in aquatic ecosystems,and provide theoretical basis for the rational use and pollution remediation of dinotefuran.关键词
手性农药/新烟碱类杀虫剂/微生物/残留特征/生态毒性Key words
chiral pesticides/neonicotinoids/microorganism/residual characteristics/ecotoxicity分类
环境科学引用本文复制引用
林伟,李世博,王秀国,吴平,刘通..呋虫胺对映体在水体沉积物中的选择性蓄积及对微生态系统的影响[J].农药学学报,2024,26(3):594-603,10.基金项目
中国烟草总公司重大科技项目(110202101052(LS-12)) （110202101052(LS-12）
福建省烟草公司南平市公司科技项目(NYK2022-10-03). Supported by Major Scientific and Technological Projects of China Tobacco(No.110202101052(LS-12)) （NYK2022-10-03）
Scientific and Technological projects of Nanping Branch of Fujian Tobacco Company(No.NYK2022-10-03). （No.NYK2022-10-03）
