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Aquat Toxicol. 2016 Sep;178:72-9. doi: 10.1016/j.aquatox.2016.07.010. Epub 2016 Jul 21.

Physiological effects of the herbicide glyphosate on the cyanobacterium Microcystis aeruginosa.

Author information

1
School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China.
2
School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China; Key Laboratory of Geo-information Science of the Ministry of Education, College of Geographic Science, East China Normal University, Shanghai 200241, China.
3
School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China. Electronic address: yejinganna@163.com.
4
School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China. Electronic address: hu-xj@mail.tsinghua.edu.cn.

Abstract

Glyphosate has been used extensively for weed control in agriculture in many countries. However, glyphosate can be transported into the aquatic environment and might cause adverse effects on aquatic life. This study investigated the physiological characteristics of cyanobacteria Microcystis aeruginosa (M. aeruginosa) after exposure to glyphosate, and the results showed that changes in cell density production, chlorophyll a and protein content are consistent. In M. aeruginosa, oxidative stress caused by glyphosate indicated that 48h of exposure increased the concentration of malondialdehyde (MDA) and enhanced the activities of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD). To further investigate the toxicity of glyphosate on M. aeruginosa, the viability of treated cells was monitored and the toxin release was determined. The results indicated that glyphosate induced apoptosis of and triggered toxin release in M. aeruginosa. These results are helpful for understanding the toxic effects of glyphosate on cyanobacteria, which is important for environmental assessment and protection. These results are also useful for guidance on the application of this type of herbicide in agricultural settings.

KEYWORDS:

Glyphosate; Microcystis aeruginosa; Oxidative stress; Toxicity

PMID:
27472782
DOI:
10.1016/j.aquatox.2016.07.010
[Indexed for MEDLINE]

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