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Bacillus megaterium strains derived from water and soil exhibit differential responses to the herbicide mesotrione

Dobrzanski, Tatiane ; Gravina, Fernanda ; Steckling, Bruna ; Olchanheski, Luiz R ; Sprenger, Ricardo F ; Espírito Santo, Bruno C ; Galvão, Carolina W ; Reche, Péricles M ; Prestes, Rosilene A ; Pileggi, Sônia A V ; Campos, Francinete R ; Azevedo, Ricardo A ; Sadowsky, Michael J ; Beltrame, Flávio L ; Pileggi, Marcos Virolle, Marie-Joelle

PloS one, 2018-04, Vol.13 (4), p.e0196166 [Periódico revisado por pares]

United States: Public Library of Science

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Título:
Bacillus megaterium strains derived from water and soil exhibit differential responses to the herbicide mesotrione
Autor: Dobrzanski, Tatiane ; Gravina, Fernanda ; Steckling, Bruna ; Olchanheski, Luiz R ; Sprenger, Ricardo F ; Espírito Santo, Bruno C ; Galvão, Carolina W ; Reche, Péricles M ; Prestes, Rosilene A ; Pileggi, Sônia A V ; Campos, Francinete R ; Azevedo, Ricardo A ; Sadowsky, Michael J ; Beltrame, Flávio L ; Pileggi, Marcos
Virolle, Marie-Joelle
Assuntos: Adaptation, Physiological ; Agriculture ; Agrochemicals ; Analysis ; Aquatic environment ; Bacillus ; Bacillus megaterium - classification ; Bacillus megaterium - drug effects ; Bacillus megaterium - genetics ; Bacillus megaterium - growth & development ; Bacteria ; Biodegradation ; Biodegradation, Environmental ; Biogeochemical cycles ; Biology and Life Sciences ; Callisto ; Catalase ; Cell culture ; Cellular structure ; Culture media ; Cyclohexanones - pharmacology ; E coli ; Ecological monitoring ; Ecology and Environmental Sciences ; Ecosystem ; Environmental aspects ; Environmental changes ; Environmental degradation ; Enzymes ; Escherichia coli ; Exhibitions ; Herbicides ; Herbicides - pharmacology ; Hydrogen peroxide ; Jupiter ; Jupiter satellites ; Life assessment ; Lipid Peroxidation - drug effects ; Membrane permeability ; Metabolism ; Metabolites ; Microbial Viability - drug effects ; Microbiota ; Microbiota (Symbiotic organisms) ; Microorganisms ; Oxidation ; Oxidative stress ; Oxygen ; Physiological aspects ; Pressure effects ; Reactive oxygen species ; RNA, Ribosomal, 16S - genetics ; Sequence Analysis, DNA ; Soil Microbiology ; Soil permeability ; Soil water ; Soils ; Superoxide dismutase ; Toxicity ; Water Microbiology ; Weed control ; Xenobiotics
É parte de: PloS one, 2018-04, Vol.13 (4), p.e0196166
Notas: Competing Interests: The authors have declared that no competing interests exist.
These authors also contributed equally to this work
Descrição: The intense use of herbicides for weed control in agriculture causes selection pressure on soil microbiota and water ecosystems, possibly resulting in changes to microbial processes, such as biogeochemical cycles. These xenobiotics may increase the production of reactive oxygen species and consequently affect the survival of microorganisms, which need to develop strategies to adapt to these conditions and maintain their ecological functionality. This study analyzed the adaptive responses of bacterial isolates belonging to the same species, originating from two different environments (water and soil), and subjected to selection pressure by herbicides. The effects of herbicide Callisto and its active ingredient, mesotrione, induced different adaptation strategies on the cellular, enzymatic, and structural systems of two Bacillus megaterium isolates obtained from these environments. The lipid saturation patterns observed may have affected membrane permeability in response to this herbicide. Moreover, this may have led to different levels of responses involving superoxide dismutase and catalase activities, and enzyme polymorphisms. Due to these response systems, the strain isolated from water exhibited higher growth rates than did the soil strain, in evaluations made in oligotrophic culture media, which would be more like that found in semi-pristine aquatic environments. The influence of the intracellular oxidizing environments, which changed the mode of degradation of mesotrione in our experimental model and produced different metabolites, can also be observed in soil and water at sites related to agriculture. Since the different metabolites may present different levels of toxicity, we suggest that this fact should be considered in studies on the fate of agrochemicals in different environments.
Editor: United States: Public Library of Science
Idioma: Inglês

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Bacillus megaterium strains derived from water and soil exhibit differential responses to the herbicide mesotrione

United States: Public Library of Science

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