Biodegradation of nicosulfuron by a Talaromyces flavus LZM1

Song, Jinlong; Gu, Jingang; Zhai, Yi; Wu, Wei; Wang, Haisheng; Ruan, Zhiyong; Shi, Yanhua; Yan, Yanchun

doi:10.1016/j.biortech.2013.02.086

Cited by 65 publications

(38 citation statements)

References 21 publications

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“…Some other microbes, capable of degrading metsulfuron-methy, have been isolated 32, 33 . A group of microbes that can degrade chlorimuron-ethyl have also been identified 32, 34, 35 . In addition, Serratia marcescens N80 with nicosulfuron as the sole nitrogen source, could degradate 93.6% nicosulfuron with initial concentration of 10 mg/L in 96 hours.…”

Section: Discussionmentioning

confidence: 99%

Hydrolysis of nicosulfuron under acidic environment caused by oxalate secretion of a novel Penicillium oxalicum strain YC-WM1

Feng

Zheng

Song

et al. 2017

Sci Rep

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A novel Penicillium oxalicum strain YC-WM1, isolated from activated sludge, was found to be capable of completely degrading 100 mg/L of nicosulfuron within six days when incubated in GSM at 33 °C. Nicosulfuron degradation rates were affected by GSM initial pH, nicosulfuron initial concentration, glucose initial concentration, and carbon source. After inoculation, the medium pH was decreased from 7.0 to 4.5 within one day and remained at around 3.5 during the next few days, in which nicosulfuron degraded quickly. Besides, 100 mg/L of nicosulfuron were completely degraded in GSM medium at pH of 3.5 without incubation after 4 days. So, nicosulfuron degradation by YC-WM1 may be acidolysis. Based on HPLC analysis, GSM medium acidification was due to oxalate accumulation instead of lactic acid and oxalate, which was influenced by different carbon sources and had no relationship to nicosulfuron initial concentration. Furthermore, nicosulfuron broke into aminopyrimidine and pyridylsulfonamide as final products and could not be used as nitrogen source and mycelium didn’t increase in GSM medium. Metabolomics results further showed that nicosulfuron degradation was not detected in intracellular. Therefore, oxalate secretion in GSM medium by strain YC-WM1 led to nicosulfuron acidolysis.

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Section: Discussionmentioning

confidence: 99%

Hydrolysis of nicosulfuron under acidic environment caused by oxalate secretion of a novel Penicillium oxalicum strain YC-WM1

Feng

Zheng

Song

et al. 2017

Sci Rep

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“…population density of pesticide-degrading microorganisms) and abiotic (i.e. temperature, pH and pesticide concentration) (Zhang et al 2010;Song et al 2013;Javaid et al 2016). Ideally, microbial transformation of pesticides will result in complete mineralization, leading to final transformation products like pyruvate or acetaldehyde which are used as energy sources in bacterial metabolism (Fetzner 2002).…”

Section: Introductionmentioning

confidence: 99%

Characterization of the biodegradation, bioremediation and detoxification capacity of a bacterial consortium able to degrade the fungicide thiabendazole

et al. 2017

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Thiabendazole (TBZ) is a persistent fungicide used in the post-harvest treatment of fruits. Its application results in the production of contaminated effluents which should be treated before their environmental discharge. In the absence of efficient treatment methods in place, biological systems based on microbial inocula with specialized degrading capacities against TBZ could be a feasible treatment approach. Only recently the first bacterial consortium able to rapidly transform TBZ was isolated. This study aimed to characterize its biodegradation, bioremediation and detoxification potential. The capacity of the consortium to mineralize 14 C-benzyl-ring labelled TBZ was initially assessed. Subsequent tests evaluated its degradation capacity under various conditions (range of pH, temperatures and TBZ concentration levels) and relevant practical scenarios (simultaneous presence of other postharvest compounds) and its bioaugmentation potential in soils contaminated with increasing TBZ levels. Finally cytotoxicity assays explored its detoxification potential. The consortium effectively mineralized the benzoyl ring of the benzimidazole moiety of TBZ and degraded spillage level concentrations of the fungicide in aqueous cultures (750 mg L -1 ) and in soil (500 mg kg -1). It maintained its high degradation capacity in a wide range of pH (4.5-7.5) and temperatures (15-37°C) and in the presence of other pesticides (ortho-phenylphenol and diphenylamine). Toxicity assays using the human liver cancer cell line HepG2 showed a progressive decrease in cytotoxicity, concomitantly with the biodegradation of TBZ, pointing to a detoxification process. Overall, the bacterial consortium showed high potential for future implementation in bioremediation and biodepuration applications.

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“…There are many microorganisms isolated from soils or water that can degrade sulfonylurea herbicides (Boschin et al 2003;Xu et al 2009;Song et al 2013). However, research on the biodegradation of thifensulfuron-methyl is limited.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of thifensulfuron-methyl by Ochrobactrum sp. in liquid medium and soil

Zhao

et al. 2015

Biotechnol Lett

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Biodegradation of nicosulfuron by a Talaromyces flavus LZM1

Cited by 65 publications

References 21 publications

Hydrolysis of nicosulfuron under acidic environment caused by oxalate secretion of a novel Penicillium oxalicum strain YC-WM1

Hydrolysis of nicosulfuron under acidic environment caused by oxalate secretion of a novel Penicillium oxalicum strain YC-WM1

Characterization of the biodegradation, bioremediation and detoxification capacity of a bacterial consortium able to degrade the fungicide thiabendazole

Biodegradation of thifensulfuron-methyl by Ochrobactrum sp. in liquid medium and soil

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