A multiphasic characterization of the impact of the herbicide acetochlor on freshwater bacterial communities

The ISME Journal
Meghan E FoleyCyndee L Gruden

Abstract

Acetochlor is the third most frequently detected herbicide in natural waters; however, it is unknown if exposure to environmentally relevant concentrations of acetochlor will impact bacterial community structure and function. This study examined the impact of acetochlor on freshwater heterotrophic bacteria number, and community structure and function using direct counting, community level physiological profiling (CLPP) and denaturing gradient gel electrophoresis (DGGE) analysis. Acetochlor concentration did not appear to correlate with the number of total (P=0.69) and viable (P=0.80) bacteria, even at concentrations up to 500 microg l(-1). However, CLPP indicated that acetochlor increased functional diversity as shown by (i) an increase in the number of carbon sources utilized by the microbial community, relative to nonexposed controls and (ii) increased functional evenness within the heterotrophic bacterial community. Conversely, DGGE fingerprints suggested that exposure to acetochlor generally decreased the community complexity, as the average number of DGGE bands in most treatments was significantly less than in the control treatment. Cluster analysis of DGGE fingerprints revealed three distinct, dose-dependent clusters (i) ...Continue Reading

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Citations

May 7, 2009·Bulletin of Environmental Contamination and Toxicology·Minna WuChenggang Zhang
Jul 20, 2012·Environmental Science and Pollution Research International·Zhen BaiXu-Dong Zhang
Aug 8, 2015·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Juraj MedoSoňa Javoreková
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Nov 14, 2016·The Science of the Total Environment·Aourell MauffretCatherine Joulian
Jan 15, 2020·Environmental Science and Pollution Research International·Yiming ChangHongyun Jiang
Apr 26, 2019·Applied Biochemistry and Biotechnology·Xiaojing LiYongtao Li
May 26, 2020·Molecular and Cellular Endocrinology·Vance L TrudeauValérie S Langlois
Jul 3, 2021·International Journal of Molecular Sciences·Sebastián A CuestaJosé R Mora

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