Insight Into Microbial Applications for the Biodegradation of Pyrethroid Insecticides

Bhatt, Pankaj; Huang, Yaohua; Zhan, Hui; Chen, Shaohua

doi:10.3389/fmicb.2019.01778

Cited by 157 publications

(81 citation statements)

References 188 publications

(208 reference statements)

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“…Carboxylesterase enzyme is produced by the microorganism that specifically cleaves a carboxylate bond [44,45]. This cleavage transforms parent pesticide into the smaller molecular weight compound containing a carboxylic acid or alcohol that further oxidizes and dehydrogenates to yield less toxic or non-toxic compounds [46,47]. It is worth noting that the D-cyphenothrin degradation products are non-toxic to the environment.…”

Section: 2-benzenedicarboxylic Acid Dipropyl Estermentioning

confidence: 99%

New Insights into the Microbial Degradation of D-Cyphenothrin in Contaminated Water/Soil Environments

et al. 2020

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Persistent use of the insecticide D-cyphenothrin has resulted in heavy environmental contamination and public concern. However, microbial degradation of D-cyphenothrin has never been investigated and the mechanism remains unknown. During this study, for the first time, an efficient D-cyphenothrin-degrading bacterial strain Staphylococcus succinus HLJ-10 was identified. Response surface methodology was successfully employed by using Box-Behnken design to optimize the culture conditions. At optimized conditions, over 90% degradation of D-cyphenothrin (50 mg·L−1) was achieved in a mineral salt medium within 7 d. Kinetics analysis revealed that its half-life was reduced by 61.2 d, in comparison with the uninoculated control. Eight intermediate metabolites were detected in the biodegradation pathway of D-cyphenothrin including cis-D-cyphenothrin, trans-D-cyphenothrin, 3-phenoxybenzaldehyde, α-hydroxy-3-phenoxy-benzeneacetonitrile, trans-2,2-dimethyl-3-propenyl-cyclopropanol, 2,2-dimethyl-3-propenyl-cyclopropionic acid, trans-2,2-dimethyl-3-propenyl-cyclopropionaldehyde, and 1,2-benzenedicarboxylic acid, dipropyl ester. This is the first report about the degradation of D-cyphenothrin through cleavage of carboxylester linkage and diaryl bond. In addition to degradation of D-cyphenothrin, strain HLJ-10 effectively degraded a wide range of synthetic pyrethroids including permethrin, tetramethrin, bifenthrin, allethrin, and chlorempenthrin, which are also widely used insecticides with environmental contamination problems. Bioaugmentation of D-cyphenothrin-contaminated soils with strain HLJ-10 substantially enhanced its degradation and over 72% of D-phenothrin was removed from soils within 40 d. These findings unveil the biochemical basis of a highly efficient D-cyphenothrin-degrading bacterial isolate and provide potent agents for eliminating environmental residues of pyrethroids.

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Section: 2-benzenedicarboxylic Acid Dipropyl Estermentioning

confidence: 99%

New Insights into the Microbial Degradation of D-Cyphenothrin in Contaminated Water/Soil Environments

et al. 2020

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“…Cypermethrin ((±)-α-cyano-3-phenoxybenzyl (±)-cis-trans3-(2,2-dichlorovinyl)-2,2-dimethylcyclo propanecarboxylate) is a synthetic pyrethroid that is commonly used against agricultural and household pests. Pyrethroids are applied worldwide to protect crop fields against insects and enhance agricultural production [1,2]. Pyrethroids also play a crucial role in the control of household insects, especially mosquitoes [3].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Cypermethrin Degradation Kinetics and Metabolic Pathway in Bacillus thuringiensis Strain SG4

et al. 2020

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Cypermethrin is popularly used as an insecticide in households and agricultural fields, resulting in serious environmental contamination. Rapid and effective techniques that minimize or remove insecticidal residues from the environment are urgently required. However, the currently available cypermethrin-degrading bacterial strains are suboptimal. We aimed to characterize the kinetics and metabolic pathway of highly efficient cypermethrin-degrading Bacillus thuringiensis strain SG4. Strain SG4 effectively degraded cypermethrin under different conditions. The maximum degradation was observed at 32 °C, pH 7.0, and a shaking speed of 110 rpm, and about 80% of the initial dose of cypermethrin (50 mg·L−1) was degraded in minimal salt medium within 15 days. SG4 cells immobilized with sodium alginate provided a higher degradation rate (85.0%) and lower half-life (t1/2) of 5.3 days compared to the 52.9 days of the control. Bioaugmentation of cypermethrin-contaminated soil slurry with strain SG4 significantly enhanced its biodegradation (83.3%). Analysis of the degradation products led to identification of nine metabolites of cypermethrin, which revealed that cypermethrin could be degraded first by cleavage of its ester bond, followed by degradation of the benzene ring, and subsequent metabolism. A new degradation pathway for cypermethrin was proposed based on analysis of the metabolites. We investigated the active role of B. thuringiensis strain SG4 in cypermethrin degradation under various conditions that could be applied in large-scale pollutant treatment.

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“…They also generate highly toxic compounds during the degradation process (Manickam et al, 2006;Usman et al, 2014;Dominguez et al, 2018a,b;Jung et al, 2018;Huang et al, 2019). However, the microbial degradation of lindane contamination is attracting increasing attention as a less expensive and more environmentally friendly alternative to conventional treatment methods Arora et al, 2017;Bajaj et al, 2017;Cycoń et al, 2017;Zhang H. et al, 2018;Bhatt et al, 2019a). The first report regarding the microbial degradation of lindane was published in 1967.…”

Section: Introductionmentioning

confidence: 99%

Insights Into the Biodegradation of Lindane (γ-Hexachlorocyclohexane) Using a Microbial System

et al. 2020

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Lindane (γ-hexachlorocyclohexane) is an organochlorine pesticide that has been widely used in agriculture over the last seven decades. The increasing residues of lindane in soil and water environments are toxic to humans and other organisms. Large-scale applications and residual toxicity in the environment require urgent lindane removal. Microbes, particularly Gram-negative bacteria, can transform lindane into non-toxic and environmentally safe metabolites. Aerobic and anaerobic microorganisms follow different metabolic pathways to degrade lindane. A variety of enzymes participate in lindane degradation pathways, including dehydrochlorinase (LinA), dehalogenase (LinB), dehydrogenase (LinC), and reductive dechlorinase (LinD). However, a limited number of reviews have been published regarding the biodegradation and bioremediation of lindane. This review summarizes the current knowledge regarding lindane-degrading microbes along with biodegradation mechanisms, metabolic pathways, and the microbial remediation of lindane-contaminated environments. The prospects of novel bioremediation technologies to provide insight between laboratory cultures and largescale applications are also discussed. This review provides a theoretical foundation and practical basis to use lindane-degrading microorganisms for bioremediation.

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Insight Into Microbial Applications for the Biodegradation of Pyrethroid Insecticides

Cited by 157 publications

References 188 publications

New Insights into the Microbial Degradation of D-Cyphenothrin in Contaminated Water/Soil Environments

New Insights into the Microbial Degradation of D-Cyphenothrin in Contaminated Water/Soil Environments

Enhanced Cypermethrin Degradation Kinetics and Metabolic Pathway in Bacillus thuringiensis Strain SG4

Insights Into the Biodegradation of Lindane (γ-Hexachlorocyclohexane) Using a Microbial System

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