Bioaccumulation, biotransformation and toxic effect of fipronil in Escherichia coli

Bhatti, Saurabh; Satyanarayana, G.N.V.; Patel, Devendra Kumar; Satish, A.

doi:10.1016/j.chemosphere.2019.05.124

Cited by 37 publications

(22 citation statements)

References 44 publications

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“…The pressure of xenobiotic selection in the environment promotes the biostimulation and bioaccumulation mechanisms of autochthonous microorganisms, therefore favoring the growth of xenobiotic resistant bacteria present in the soil. 18,22,54 Fipronil degradation Of the 13 bacteria isolated from soil samples with a history of fipronil application, B. megaterium E1 was studied for fipronil degradation because it exhibited the best growth (results not shown). Figure 2 shows the increase in cell biomass of the E1 isolate in the first days of incubation and its growth peak at 10 days versus its degradation of fipronil in comparison to the abiotic control.…”

Section: Resultsmentioning

confidence: 99%

“…16,17 Due to its toxicity, an important focus for research is methods for reducing the environmental impact generated by fipronil; these methods can include a variety of biodegradation processes. [18][19][20][21][22] The most desirable outcome of fipronil biodegradation is eliminating its toxicity, as well as the toxicity of any metabolite formed during the degradation process. 23 In studies on soil with a history of fipronil application, a half-life ranging from 15 to 105 days has been reported, this number varying as a result of the type of the soil being analyzed.…”

Section: Introductionmentioning

confidence: 99%

“…29 A few studies have been conducted on fipronil biodegradation. 18,22,[28][29][30][31][32][33][34][35][36][37][38][39][40][41] However, not enough studies have been performed in tropical regions. The purpose of this research is to provide a better understanding of the fipronil biodegradation process and the metabolites generated in tropical soils.…”

Section: Introductionmentioning

confidence: 99%

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Fipronil biodegradation and metabolization by Bacillus megaterium strain E1

Prado

Pereira

Durrant³

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: Fipronil is a broad-spectrum insecticide that is used extensively due to its effective action in pest control. However, environmental studies have shown it has high toxicity towards non-target organisms as well. In addition, the degradation of fipronil can generate even more toxic and reactive metabolites in the environment. In the present study, bioprospecting for bacteria with the potential to degrade fipronil was performed using fipronil as the sole source of nitrogen and main source of carbon. From samples of corn culture soil with a history of fipronil application, isolation was performed using the microcosm enrichment method. RESULTS: Bacteria were isolated using fipronil (0.6 g L −1 ) as the sole nitrogen source and main carbon source. After preliminary tests, isolate E1 was selected and, following sequencing of 16S rRNA, it was found that the isolate E1 was a bacterium of the Bacillaceae family, Bacillus megaterium species. Growth was evaluated by dry biomass and degradation quantified by gas chromatography-mass spectrometry (GC-MS). Strain E1 presented a 94% degradation of fipronil, as well as 91% and 96% degradation of its metabolites fipronil-sulfide and fipronil-sulfone, respectively, in 14 days, reducing its initial concentration from 0.6 g L −1 to 0.036 mg L −1 . CONCLUSION: The results showed that bioprospecting of the E1 strain, isolated from soil, showed efficiency in the biodegradation process of fipronil. This strain is a potential candidate for use in bioremediation processes in areas contaminated with fipronil and for use in further studies on the elucidation of the metabolic pathways of fipronil degradation.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fipronil biodegradation and metabolization by Bacillus megaterium strain E1

Prado

Pereira

Durrant³

et al. 2021

J of Chemical Tech & Biotech

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“…refs. [264][265][266] ) in living organisms, and some highlight potential impacts (such as toxicity) of heavy metals [262,[267][268][269][270][271][272] and organic pollutants [16,264,273] even at low concentrations.…”

Section: Selectivity Of Adsorbentsmentioning

confidence: 99%

Smart Adsorbents for Aquatic Environmental Remediation

Zare‬

Mudhoo

Khan

et al. 2021

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“…(Kumar et al, 2012). Even E. coli (Bhatti et al, 2019) may use fipronil as carbon source. Moreover, previous studies have shown that predominant bacterial taxa in our samples are specialists for degradation of high molecular weight compounds, including pesticides.…”

Section: Effect Of Fipronil On River and Soil Microbial Communitymentioning

confidence: 99%