Wang, Wenjing; Jiang, Ming; Sheng, Yanqing
发表期刊ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
ISSN0730-7268
2021-02
卷号40期号:2页码:342-351
关键词Microcystis aeruginosaMicrocystinGlyphosateDissolved organic matter
DOI10.1002/etc.4942
英文摘要Glyphosate is a commonly used herbicide known for its high performance in killing certain plants and grasses; however, its use is regulated due to its harmful effects on the aquatic environment. The present study investigated and compared the toxic mechanisms of glyphosate on Microcystis aeruginosa (a toxin-producing cyanobacterium) under 2 conditions: 0 parts per thousand saline media (experiment I) and 2.5 parts per thousand saline media (experiment II). The results indicated that an appropriate concentration of glyphosate provided a phosphate source for M. aeruginosa, resulting in an increased specific growth rate in both experimental groups compared with the controls. Glyphosate-enhanced alkaline phosphatase (ALP) activity increased by up to 1.37-fold in experiment I and 1.68-fold in experiment II. Moreover, the activities of superoxide dismutase (SOD) and catalase (CAT) decreased at glyphosate concentrations below 1.2 mg L-1 but increased at concentrations greater than 1.2 mg L-1 in experiment I, whereas SOD and CAT activities decreased in experiment II and declined by 64 and 49% in the 30 mg L-1 treatments. Furthermore, the transcript abundances of the pyruvate carboxylase (pcB), microcystin synthetase B (mcyB), and paired-like homeobox (phoX) genes were up-regulated by up to 6.92-, 3.63-, and 2.27-fold in experiment I and 6.74-, 6.55-, and 4.86-fold in experiment II after 96 h of incubation. The addition of glyphosate stimulated the production of dissolved organic matter including tryptophan-like substances, fulvic acid-like substances, (marine) humic acid-like substances, and microcystin-leucine-arginine in the culture. In conclusion, glyphosate stimulates the proliferation of M. aeruginosa and enhances the release of dissolved organic matter in saltwater ecosystems. Environ Toxicol Chem 2020;00:1-10. (c) 2020 SETAC
资助机构National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31600370, 41373100]; Science and Technology Plan of Yantai City [2018ZHGY080, 2018ZHGY083]; Regional Key Project of STS of the Chinese Academy of Sciences [KFJ-STS-QYZX-057]
收录类别SCI
语种英语
关键词[WOS]EXTRACELLULAR POLYMERIC SUBSTANCES; GROWTH; RESPONSES; PHOSPHORUS; TOLERANCE; TOXICITY; WATER
研究领域[WOS]Environmental Sciences & Ecology; Toxicology
WOS记录号WOS:000600758400001
引用统计被引频次：1[WOS][WOS记录][WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://ir.yic.ac.cn/handle/133337/30512
专题中科院海岸带环境过程与生态修复重点实验室_海岸带环境工程技术研究与发展中心
作者单位Chinese Acad Sci, Res Ctr Coastal Environm Engn Technol Shandong Pr, Yantai Inst Coastal Zone Res, Yantai, Shandong, Peoples R China
推荐引用方式
GB/T 7714Wang, Wenjing,Jiang, Ming,Sheng, Yanqing. Glyphosate Accelerates the Proliferation of Microcystis aeruginosa, a Dominant Species in Cyanobacterial Blooms[J]. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY,2021,40(2):342-351.
APAWang, Wenjing,Jiang, Ming,&Sheng, Yanqing.(2021).Glyphosate Accelerates the Proliferation of Microcystis aeruginosa, a Dominant Species in Cyanobacterial Blooms.ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY,40(2),342-351.
MLAWang, Wenjing,et al."Glyphosate Accelerates the Proliferation of Microcystis aeruginosa, a Dominant Species in Cyanobacterial Blooms".ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 40.2(2021):342-351.
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