The mechanism of different cyanobacterial responses to glyphosate
The mechanism of different cyanobacterial responses to glyphosate
复制标题
不同蓝藻对草甘膦反应的机制
DOI：
10.1016/j.jes.2021.11.039
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发表时间：
2022-02-12
影响因子：
6.9
通讯作者：
Qian, Haifeng
中科院分区：
文献类型：
--
作者：
Lin, Wei;Zhang, Zhenyan;Qian, Haifeng
Glyphosate, the most extensively used herbicide globally, has raised ecotoxicological con-cerns because it can be transported into the aquatic environment and cause adverse effects on the aquatic system. However, the functional mechanism of glyphosate on cyanobacte-ria are not completely disentangled. In this study, we selected six common cyanobacteria to evaluate glyphosate effects on cyanobacterial growth in monoculture experiment. Re-sults showed that the growth of five tested cyanobacterial species were promoted under different degrees, and only Pseudanabaena was inhibited by glyphosate. In the phylogenetic tree based on gene sequences of 5-enol-pyruvylshikimate-3-phosphate synthase (EPSPS), a target for glyphosate, we found that the position of Pseudanabaena is the closest to plant, which was sensitive to glyphosate, thereby explaining the inhibitory effect of Pseudanabaena following glyphosate exposure. The primary degraded metabolites or analogs did not in -duce cyanobacterial growth, laterally demonstrating that glyphosate was used as a source of phosphorus to accelerate cyanobacterial growth because phosphorus levels increased in the medium of glyphosate treatment. Overall, this study provides a better understanding of the influence of glyphosate on the composition of aquatic microbiota and explains the mechanism of cyanobacterial response to glyphosate. (c) 2022 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
