Impact of Atrazine Exposure on the Microbial Community Structure in a Brazilian Tropical Latosol Soil
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- Fernandes Ana Flavia Tonelli
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo Biotechnology Institute, University of Minnesota
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- Wang Ping
- Biotechnology Institute, University of Minnesota
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- Staley Christopher
- Biotechnology Institute, University of Minnesota
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- Aparecida Silva Moretto Jéssica
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo
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- Miguel Altarugio Lucas
- Department of Soil Science ESALQ, University of São Paulo
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- Chagas Campanharo Sarah
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo
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- Guedes Stehling Eliana
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo
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- Jay Sadowsky Michael
- Biotechnology Institute, University of Minnesota Department of Soil, Water, & Climate, 1991 Upper Buford Circle and Department of Plant and Microbial Biology, 1479 Gortner Avenue—University of Minnesota
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Abstract
<p>Atrazine is a triazine herbicide that is widely used to control broadleaf weeds. Its widespread use over the last 50 years has led to the potential contamination of soils, groundwater, rivers, and lakes. Its main route of complete degradation is via biological means, which is carried out by soil microbiota using a 6-step pathway. The aim of the present study was to investigate whether application of atrazine to soil changes the soil bacterial community. We used 16S rRNA gene sequencing and qPCR to elucidate the microbial community structure and assess the abundance of the atrazine degradation genes atzA, atzD, and trzN in a Brazilian soil. The results obtained showed that the relative abundance of atzA and trzN, encoding triazine-initiating metabolism in Gram-negative and -positive bacteria, respectively, increased in soil during the first weeks following the application of atrazine. In contrast, the abundance of atzD, encoding cyanuric acid amidohydrolase—the fourth step in the pathway—was not related to the atrazine treatment. Moreover, the overall soil bacterial community showed no significant changes after the application of atrazine. Despite this, we observed increases in the relative abundance of bacterial families in the 4th and 8th weeks following the atrazine treatment, which may have been related to higher copy numbers of atzA and trzN, in part due to the release of nitrogen from the herbicide. The present results revealed that while the application of atrazine may temporarily increase the quantities of the atzA and trzN genes in a Brazilian Red Latosol soil, it does not lead to significant and long-term changes in the bacterial community structure.</p>
Journal
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- Microbes and Environments
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Microbes and Environments 35 (2), n/a-, 2020
Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology / Japanese Society of Plant Microbe Interactions / Japanese Society for Extremophiles
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Details 詳細情報について
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- CRID
- 1390283659870059776
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- NII Article ID
- 130007829887
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- NII Book ID
- AA11551577
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- ISSN
- 13474405
- 13426311
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- NDL BIB ID
- 030475426
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- PubMed
- 32269200
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- Abstract License Flag
- Disallowed