Bacterial responses to environmental herbicide pollutants (glyphosate and paraquat)
The toxic effect of herbicides on non- target microorganisms may influence degradation of organic matter resulting in changes to nutrient cycling. In the present study, different strains of bacteria incubated in media containing different concentrations of glyphosate and paraquat were assessed ove...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
University of Guilan
2018-03-01
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| Series: | Caspian Journal of Environmental Sciences |
| Subjects: | |
| Online Access: | https://cjes.guilan.ac.ir/article_2780.html |
| Summary: | The toxic effect of herbicides on non- target microorganisms may influence degradation of organic matter resulting
in changes to nutrient cycling. In the present study, different strains of bacteria incubated in media containing
different concentrations of glyphosate and paraquat were assessed over a period of two incubation terms. The
deleterious impact of the herbicide was observed as glyphosate and paraquate treatments led to a reduction in the
bacterial population. Analysis of the colony- forming unit (CFUs) showed a declining in microbial growth from 0
to 24 hours of incubation in all concentrations of glyphosate followed by a steady declining rate of the bacterial
population after 48 h. The greatest bacterial population developed in media containing concentrations of
glyphosate and paraquat was observed with strains S13.3, while strains S55 and S35 showed the lowest biomass
production in response to all concentrations of glyphosate and paraquat. Based on the results obtained, strain S13.3
was determined to be resistant to the herbicides examined and may be useful for bioremediation of these
compounds in soil. |
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| ISSN: | 1735-3033 1735-3866 |