Biodegradation of carbendazim by a novel actinobacterium Rhodococcus jialingiae djl-6-2

Wang, Zhichun; Wang, Yangyang; Gong, Fang-Ying; Zhang, Juan; Hong, Qing; Li, Shunpeng

doi:10.1016/j.chemosphere.2010.08.040

Cited by 56 publications

(32 citation statements)

References 12 publications

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“…1). The results obtained by Wang et al (2010) revealed that strain Rhodococcus jialingiae djl-6-2 was able to degrade MBC to 2-HB via 2-AB. The authors also indicated to dihydroxybenzimidazole and 2,6,7-trihydroxybenzimidazole as the metabolites of 2-HB degradation (Fig.…”

Section: Dynamics Of Tm Disappearance and Amounts Of Mbc And 2-ab In mentioning

confidence: 94%

Biodegradation kinetics of the benzimidazole fungicide thiophanate-methyl by bacteria isolated from loamy sand soil

2010

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Degradation of the fungicide thiophanate-methyl (TM) by Enterobacter sp. TDS-1 and Bacillus sp. TDS-2 isolated from sandy soil previously treated with TM was studied in mineral salt medium (MSM) and soil. Both strains were able to grow in MSM supplemented with TM (50 mg l(-1)) as the sole carbon source. Over a 16 days incubation period, 60 and 77% of the initial dose of TM were degraded by strains TDS-1 and TDS-2, respectively, and disappearance of TM was described by first-order kinetics. Medium supplementation with glucose markedly stimulated bacterial growth; while the final rate of TM degradation was reduced by 21 and 27% for strains TDS-1 and TDS-2, respectively as compared to medium with TM only. Moreover, this additional carbon source changed the TM degradation kinetics, which proceeded according to a zero-order model. This effect was linked to substrate competition and/or a strong decrease of medium pH. Isolates degraded TM (100 mg kg(-1)) in soil with rate constants of 0.186 and 0.210 day(-1), following first-order rate kinetics, and the time in which the initial TM concentration was reduced by 50% (DT50) in soils inoculated with strains TDS-1 and TDS-2 were 6.3 and 5.1 days, respectively. Analysis of TM degradation products in soil showed that the tested strains may have the potential to transform carbendazim (MBC) to 2-aminobenzimidazole (2-AB), and may be useful for a bioremediation of MBC-polluted soils.

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Section: Dynamics Of Tm Disappearance and Amounts Of Mbc And 2-ab In mentioning

confidence: 94%

Biodegradation kinetics of the benzimidazole fungicide thiophanate-methyl by bacteria isolated from loamy sand soil

2010

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“…The mineral salt plus tryptone media (MTM) contained Na 2 HPO 4 Á12H 2 O 3 g l -1 , KH 2 PO 4 1 g l -1 , NaCl 3 g l -1 , MgSO 4 0.3 g l -1 , Tryptone 2.5 g l -1 , and the media was adjusted to pH 6.0-8.0. The mineral salt media used in this study was the same as that described by Wang et al (2010). Growth of bacteria was monitored by measuring OD 600 of culture using an ultraviolet-visible spectrophotometry (Beckman).…”

Section: Chemicals Bacterial Strains and Growth Conditionsmentioning

confidence: 99%

Isolation and characterization of Pseudomonas sp. DX7 capable of degrading sulfadoxine

Zhang

Niu

et al. 2011

Biodegradation

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Given that the intensive application of sulfonamides in aquaculture, animal husbandry and malaria treatment has lead to an increase in sulfonamide discharge into the environment, there is an increasing need to find a way to remediate sulfonamide-contaminated sites. The bacterial strain DX7 was isolated from a marine environment and is capable of degrading sulfadoxine. DX7 was identified as a Pseudomonas sp.based on 16S rRNA gene sequencing. Approximately 30% of sulfadoxine was degraded after Pseudomonas sp. DX7 was inoculated into mineral salt plus tryptone media containing 10 mg l -1 sulfadoxine for 2 days. The degradation efficiency under different environmental conditions was characterized using HPLC. The optimal temperature and pH for sulfadoxine biodegradation were around 30°C and 6.0, respectively. The optimal concentrations of sulfadoxine and tryptone for sulfadoxine biodegradation were determined to be approximately 30 mg l -1 and between 2.0 and 8.0 g l -1, respectively. Cytotoxicity analysis indicated that the metabolites of sulfadoxine generated by Pseudomonas sp. DX7 showed significantly reduced cytotoxicity to Hela cells. These results suggest that Pseudomonas sp. DX7 is a new bacterial resource for degrading sulfadoxine and indicate the potential of the isolated strain in the bioremediation of sulfadoxinecontaminated environments.

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“…The US Environmental Protection Agency (EPA) has classified them as 'known/likely' carcinogen since 1997 [2,3]. Diuron is a substitute phenylurea herbicide and carbendazim is a systematic benzimidazole fungicide and are known to be carcinogenic, mutagenic and teratogenic in experimental animals and animal cell cultures [2,3]. Octhilinone, a mild weedicide, fungicide and bactericide, is reported as neurotoxic and responsible to cause occupational asthma and allergic contact dermatitis, mostly among paint manufacturers [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Biodegradation has been described as the primary mechanism for diuron and carbendazim dissipation in the environment [2,3]; but, yet there is no report on degradation of octhilinone.…”

Section: Introductionmentioning

confidence: 99%

“…Data have been collected on the direct and indirect effects of constituents of Troysan S 89 on target and non-target organisms, and they are suspected to be genotoxic. The US Environmental Protection Agency (EPA) has classified them as 'known/likely' carcinogen since 1997 [2,3]. Diuron is a substitute phenylurea herbicide and carbendazim is a systematic benzimidazole fungicide and are known to be carcinogenic, mutagenic and teratogenic in experimental animals and animal cell cultures [2,3].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Detoxification of a carcinogenic paint preservative by Blumea malcolmii Hook cell cultures

Adki¹,

Shedbalkar²,

Jagtap³

et al. 2011

Journal of Hazardous Materials

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Biodegradation of carbendazim by a novel actinobacterium Rhodococcus jialingiae djl-6-2

Cited by 56 publications

References 12 publications

Biodegradation kinetics of the benzimidazole fungicide thiophanate-methyl by bacteria isolated from loamy sand soil

Biodegradation kinetics of the benzimidazole fungicide thiophanate-methyl by bacteria isolated from loamy sand soil

Isolation and characterization of Pseudomonas sp. DX7 capable of degrading sulfadoxine

Detoxification of a carcinogenic paint preservative by Blumea malcolmii Hook cell cultures

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