How the edaphic Bacillus megaterium strain Mes11 adapts its metabolism to the herbicide mesotrione pressure

Bardot, Corinne; Besse-Hoggan, Pascale; Carles, Louis; Gall, Morgane Le; Clary, Guilhem; Chafey, Philippe; Federici, Christian; Broussard, Cédric; Batisson, Isabelle

doi:10.1016/j.envpol.2015.01.029

Cited by 29 publications

(12 citation statements)

References 76 publications

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“…Relative groups belonging to these two orders are stress tolerant and degrade several contaminants including polycyclic aromatic hydrocarbons and various pesticides (Zhang et al, 2011 , 2012 ; Calvayrac et al, 2012 ; Giri et al, 2013 ; Li et al, 2014 ; Fang et al, 2015 ). Since microbial degradation of pesticides is an adaptive response to cope with the stress imposed by xenobiotics (Crouzet et al, 2010 ; Olchanheski et al, 2014 ; Bardot et al, 2015 ), the emergence of degraders in the microbial community is a biomarker of exposure. Such responses in microbial community structure have already been described for other herbicides including mesotrione, glyphosate, s-triazine, and sulfonylurea (Busse et al, 2001 ; Ros et al, 2006 ; Weaver et al, 2007 ; Crouzet et al, 2010 ).…”

Section: Discussionmentioning

confidence: 99%

Ecotoxicological Impact of the Bioherbicide Leptospermone on the Microbial Community of Two Arable Soils

et al. 2016

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The ecotoxicological impact of leptospermone, a β-triketone bioherbicide, on the bacterial community of two arable soils was investigated. Soil microcosms were exposed to 0 × (control), 1 × or 10 × recommended dose of leptospermone. The β-triketone was moderately adsorbed to both soils (i.e.,: Kfa ~ 1.2 and Koc ~ 140 mL g−1). Its dissipation was lower in sterilized than in unsterilized soils suggesting that it was mainly influenced by biotic factors. Within 45 days, leptospermone disappeared almost entirely from one of the two soils (i.e., DT50 < 10 days), while 25% remained in the other. The composition of the microbial community assessed by qPCR targeting 11 microbial groups was found to be significantly modified in soil microcosms exposed to leptospermone. Pyrosequencing of 16S rRNA gene amplicons showed a shift in the bacterial community structure and a significant impact of leptospermone on the diversity of the soil bacterial community. Changes in the composition, and in the α- and β-diversity of microbial community were transient in the soil able to fully dissipate the leptospermone, but were persistent in the soil where β-triketone remained. To conclude the bacterial community of the two soils was sensitive to leptospermone and its resilience was observed only when leptospermone was fully dissipated.

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Section: Discussionmentioning

confidence: 99%

Ecotoxicological Impact of the Bioherbicide Leptospermone on the Microbial Community of Two Arable Soils

et al. 2016

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“…Moreover, a proteomic study of Bacillus megaterium strain Mes11 revealed a network of mesotrione‐adaptative proteins mainly involved in stress response, central metabolism and storage mechanisms . More recently, the identification of mesotrione‐degrading enzymes (NfrA1 and NfrA2/YcnD) in this strain, led the way to new biomarkers in order to foresee the ability of environment to transform this molecule .…”

Section: Fate Of Mesotrione In the Environmentmentioning

confidence: 99%

Mesotrione Herbicide: Efficiency, Effects, and Fate in the Environment after 15 Years of Agricultural Use

Carles

Joly

2017

CLEAN Soil Air Water

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Mesotrione (2‐[4‐(methylsulfonyl)‐2‐nitrobenzoyl]‐cylohexane‐1,3‐dione) is an herbicide brought to the market 15 years ago and commonly used on maize cultures. This review summarizes the results obtained from worldwide scientific studies on its efficiency, effects, and fate in environment, in order to bring first overall conclusions about its safety of use. The comprehensive review of the available scientific literature reveals that mesotrione applied as recommended ensures the desired effects on sensitive crops, mainly in post‐emergence application, while exhibiting favorable toxicological, and environmental profile. According to the studies realized so far, mesotrione presents no significant risks to humans and other non‐target organisms or to the environment. Its degradation by soil microorganisms is fast, ensuring a low possibility to retrieve mesotrione in ground water. Its terminal residues in soil, maize, grain, and maize straw are below the limit of quantification. All these results suggest that mesotrione applied as directed ensures the respect of current environmental standards and food safety. Future prospects should focus on its associated pesticides when applied in mixtures on field, and on the detection, quantification, and risk assessment of its transformation products in order to exclude any toxicological synergistic effects.

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“…According to numerous literature reports (Barchanska et al 2014; Bardot et al 2015; Crouzet et al 2010, 2013; Joly et al 2013), triketones and their degradation products negatively influence microorganisms and aquatic plants. MES exhibits moderate retention capacity in different soils and may be leached to surface water (Chaabane et al 2008; Dyson et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Atrazine, triketone herbicides, and their degradation products in sediment, soil and surface water samples in Poland

Barchańska

Sajdak

Szczypka

et al. 2016

Environ Sci Pollut Res

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The aim of this study was to monitor the sediment, soil and surface water contamination with selected popular triketone herbicides (mesotrione (MES) and sulcotrione(SUL)), atrazine (ATR) classified as a possible carcinogen and endocrine disrupting chemical, as well as their degradation products, in Silesia (Poland). Seventeen sediment samples, 24 soil samples, and 64 surface water samples collected in 2014 were studied. After solid-liquid extraction (SLE) and solid phase extraction (SPE), analytes were determined by high-performance liquid chromatography (HPLC) with diode array detection (DAD). Ten years after the withdrawal from the use, ATR was not detected in any of the collected samples; however, its degradation products are still present in 41 % of sediment, 71 % of soil, and 8 % of surface water samples. SUL was determined in 85 % of soil samples; its degradation product (2-chloro-4-(methylosulfonyl) benzoic acid (CMBA)) was present in 43 % of soil samples. In 17 % of sediment samples, CMBA was detected. Triketones were detected occasionally in surface water samples. The chemometric analysis (clustering analysis (CA), single-factor analysis of variance (ANOVA), N-Way ANOVA) was applied to find relations between selected soil and sediment parameters and herbicides concentration. In neither of the studied cases a statistically significant relationship between the concentrations of examined herbicides, their degradation products and soil parameters (organic carbon (OC), pH) was observed.Electronic supplementary materialThe online version of this article (doi:10.1007/s11356-016-7798-3) contains supplementary material, which is available to authorized users.

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How the edaphic Bacillus megaterium strain Mes11 adapts its metabolism to the herbicide mesotrione pressure

Cited by 29 publications

References 76 publications

Ecotoxicological Impact of the Bioherbicide Leptospermone on the Microbial Community of Two Arable Soils

Ecotoxicological Impact of the Bioherbicide Leptospermone on the Microbial Community of Two Arable Soils

Mesotrione Herbicide: Efficiency, Effects, and Fate in the Environment after 15 Years of Agricultural Use

Atrazine, triketone herbicides, and their degradation products in sediment, soil and surface water samples in Poland

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