Anaerobic biodegradation and detoxification of chloroacetamide herbicides by a novel Proteiniclasticum sediminis BAD-10T

Liu, Junwei; Bao, Yixuan; Zhang, Xuan; Zhao, Shiyu; Qiu, Jiguo; Li, Na; He, Jian

doi:10.1016/j.envres.2022.112859

Cited by 24 publications

(13 citation statements)

References 43 publications

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“…This result is similar to a previous study where the degradation dynamics of acetochlor by the anaerobic strain P. sediminis BAD-10 T also conformed to the PFOKE with T 1/2 values of 3.7−46.2 days at concentrations of 50−400 μM. 21 The degradation rates of acetochlor by strain SRB-5 at concentrations of 100 and 400 μM were 2.4 and 6.1 times higher than that of strain BAD-10 T , respectively. This higher rate indicates that strain SRB-5 harbors a stronger anaerobic degradation ability of acetochlor than strain BAD-10 T .…”

Section: Degradation Kinetics and Substrate Spectra Of Strain Srb-5supporting

confidence: 91%

“…T3-1) was dealkylation to form 2-chloro- N -(2-methyl-6-ethylphenyl) acetamide. ,,, A prior study on the anaerobic acetochlor-degrading bacterium P. sediminis BAD-10 T reported the degradation of acetochlor through reductive dechlorination and the formation of EMEMA . In the present study, a novel mechanism of acetochlor degradation is reported consisting of both chemical and biological degradations by strain SRB-5.…”

Section: Resultsmentioning

confidence: 60%

“…This strain BAD-10 T can reductively dechlorinate acetochlor to 2-ethyl-6-methyl- N -(ethoxymethyl)-acetanilide (EMEMA) and then further transform it into N -(2-methyl-6-ethylphenyl) acetamide through the removal of the ethoxymethyl group. This is then followed by demethylation to N -2-ethylphenyl acetamide, which is finally carboxylated to 2-ethyl- N -carboxyl aniline . This is the first report demonstrating the anaerobic degradation pathway of acetochlor by a purely anaerobic bacterium.…”

Section: Introductionmentioning

confidence: 70%

“…This is then followed by demethylation to N-2-ethylphenyl acetamide, which is finally carboxylated to 2ethyl-N-carboxyl aniline. 21 This is the first report demonstrating the anaerobic degradation pathway of acetochlor by a purely anaerobic bacterium.…”

Section: Introductionmentioning

confidence: 91%

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Sulfate-Dependent Anaerobic Degradation of Herbicide Acetochlor by a Sulfate-Reducing Bacterium Cupidesulfovibrio sp. SRB-5

Liu

Zhao

et al. 2022

J. Agric. Food Chem.

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Acetochlor, an important chloroacetamide herbicide (CAAH) widely used in agriculture, has resulted in environmental contamination, especially of anoxic habitats. In this study, a sulfate-reducing bacterium, designated as SRB-5, was isolated from anaerobic activated sludge and was identified as Cupidesulfovibrio sp. This bacterium possesses a novel anaerobic pathway capable of degrading acetochlor. In this pathway, sulfate is first reduced to sulfide, which attacks the C–Cl bond of acetochlor and abiotically forms acetochlor-thioalcohol and dis-S-acetochlor. These further undergo microbial degradation, producing the intermediates acetochlor ethanesulfonic acid, 2-methyl-6-ethylaniline, and 2-ethylaniline. The degradation half-times of acetochlor (100 μM) by strain SRB-5 were 2.4 and 4.2 days in industrial wastewater and paddy sludge, respectively. Strain SRB-5 could also degrade alachlor, propisochlor, butachlor, pretilachlor, and metolachlor, and the degradation kinetics fit the pseudo-first-order kinetics equation. This work highlights the potential application of strain SRB-5 for the remediation of CAAHs-contaminated sites.

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Section: Degradation Kinetics and Substrate Spectra Of Strain Srb-5supporting

confidence: 91%

Section: Resultsmentioning

confidence: 60%

Section: Introductionmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 91%

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Sulfate-Dependent Anaerobic Degradation of Herbicide Acetochlor by a Sulfate-Reducing Bacterium Cupidesulfovibrio sp. SRB-5

Liu

Zhao

et al. 2022

J. Agric. Food Chem.

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“…Residual concentrations of parental compound acetochlor occurring in USA waters ranged from 2.11 [ 16 ] to 6.08 μg/L [ 17 ], and in China, from 0.0179 to 1.0549 μg/L [ 18 , 19 ]. However, its metabolite ESA is easily soluble in water, and due to leaching from the soil, it is commonly detected more frequently and even with higher concentrations [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ]. More recent detailed information about detecting ESA in waters of countries still acetochlor is missing in the literature.…”

Section: Introductionmentioning

confidence: 99%

Chronic Toxicity of Primary Metabolites of Chloroacetamide and Glyphosate to Early Life Stages of Marbled Crayfish Procambarus virginalis

Tresnakova

Kubec

Stará

et al. 2022

Biology

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Degradation products of herbicides, alone and in combination, may affect non-target aquatic organisms via leaching or runoff from the soil. The effects of 50-day exposure of primary metabolites of chloroacetamide herbicide, acetochlor ESA (AE; 4 µg/L), and glyphosate, aminomethylphosphonic acid (AMPA; 4 µg/L), and their combination (AMPA + AE; 4 + 4 µg/L) on mortality, growth, oxidative stress, antioxidant response, behaviour, and gill histology of early life stages of marbled crayfish (Procambarus virginalis) were investigated. While no treatment effects were observed on cumulative mortality or early ontogeny, growth was significantly lower in all exposed groups compared with the control group. Significant superoxide dismutase activity was observed in exposure groups, and significantly higher glutathione S-transferase activity only in the AMPA + AE group. The gill epithelium in AMPA + AE-exposed crayfish showed swelling as well as numerous unidentified fragments in interlamellar space. Velocity and distance moved in crayfish exposed to metabolites did not differ from controls, but increased activity was observed in the AMPA and AE groups. The study reveals the potential risks of glyphosate and acetochlor herbicide usage through their primary metabolites in the early life stages of marbled crayfish.

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Ultimate fate, transformation, and toxicological consequences of herbicide pretilachlor to biotic components and associated environment: An overview

Dhanda

Beniwal

Yadav

et al. 2023

J of Applied Toxicology

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Herbicides are applied for effective weed management in order to increase the crop yield. In recent decades, the overuse of these chemicals has posed adverse effects on different biotic components of the environment. Pretilachlor has been widely used during last few decades for weed management in paddy crop. Its excessive use may prove fatal for environment, various organisms, and nontarget plants. Thus, it is pertinent to know the extent to which herbicide residues remain in environment. The potential mobility and the release rate of herbicide in the soil are important factors governing ecotoxicological impact and degradation rate. Therefore, several techniques are being investigated for its effective removal from the contaminated sites. Furthermore, efforts have also been made to study the degradation of pretilachlor by various physicochemical processes, resulting into the formation of different types of metabolites. This review summarizes the available information on environmental fate, various degradation processes, microbial biotransformation, metabolites formed, ecotoxicological effects, techniques for detection in environmental samples, effect of safener, and various control release formulations for sustained release of pretilachlor in applied fields. The information so obtained will be very advantageous in deciding the future policies for safe and judicious use of the herbicide by maintaining health and environmental sustainability.

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Anaerobic biodegradation and detoxification of chloroacetamide herbicides by a novel Proteiniclasticum sediminis BAD-10T

Cited by 24 publications

References 43 publications

Sulfate-Dependent Anaerobic Degradation of Herbicide Acetochlor by a Sulfate-Reducing Bacterium Cupidesulfovibrio sp. SRB-5

Sulfate-Dependent Anaerobic Degradation of Herbicide Acetochlor by a Sulfate-Reducing Bacterium Cupidesulfovibrio sp. SRB-5

Chronic Toxicity of Primary Metabolites of Chloroacetamide and Glyphosate to Early Life Stages of Marbled Crayfish Procambarus virginalis

Ultimate fate, transformation, and toxicological consequences of herbicide pretilachlor to biotic components and associated environment: An overview

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