Topic
Microbial biodegradation
About: Microbial biodegradation is a research topic. Over the lifetime, 1647 publications have been published within this topic receiving 75473 citations.
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TL;DR: This review focuses on the biodegradation of neonicotinoid-mineralising bacterial strains in soil and water systems by the bacterial community and indicates that enhanced biotransformation of these pesticides can be accomplished by mixed microbial populations under optimised environmental conditions.
Abstract: Neonicotinoids are neurotoxic systemic insecticides used in plant protection worldwide. Unfortunately, application of neonicotinoids affects both beneficial and target insects indiscriminately. Being water soluble and persistent, these pesticides are capable of disrupting both food chains and biogeochemical cycles. This review focuses on the biodegradation of neonicotinoids in soil and water systems by the bacterial community. Several bacterial strains have been isolated and identified as capable of transforming neonicotinoids in the presence of an additional carbon source. Environmental parameters have been established for accelerated transformation in some of these strains. Studies have also indicated that enhanced biotransformation of these pesticides can be accomplished by mixed microbial populations under optimised environmental conditions. Substantial research into the identification of neonicotinoid-mineralising bacterial strains and identification of the genes and enzymes responsible for neonicotinoid degradation is still required to complete the understanding of microbial biodegradation pathways, and advance bioremediation efforts.
68 citations
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TL;DR: In this paper, the authors compared methods of examining hydrocarbons to estimate the microbial degradation of petroleum and found that gas-liquid chromatography with a mixed hydrocarbon substrate has been useful in evaluating microbial potential for degradation of a number of hydrocarbon compounds.
Abstract: Methods of examining hydrocarbons to estimate the microbial degradation of petroleum are compared. Gas-liquid chromatography with a mixed hydrocarbon substrate has been shown to be useful in evaluating microbial potential for degradation of a number of hydrocarbons.
68 citations
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TL;DR: Fried, J., Thomas, R. W. & Klingsberg, A. (1953) J. Amer.
Abstract: Fried, J., Thomas, R. W. & Klingsberg, A. (1953) J. Amer. Chem. SOC. 75, 5764-5765 Gibson, D. T. (1971) Crit. Rev. Microbiol. 1, 199-223 Griffin, M. & Trudgill, P. W. (1972) Biochem. J. 129,595-603 Griffin, M. & Trudgill, P. W. (1976) Eur. J. Biochem. in the press Guilbert, C. C. & Chung, A. E. (1974)J. Biol. Chem. 249, 1026-1030 Guyer, M. & Hegeman, G. (1969) J. Bacteriol. 99, 906-907 Harrison, P. G., Bailey, B. K. & Steck, W. (1971) C a d . J. Biochem. 49,964-970 Hirschberg, R. & Ensign, J. C. (1971) J. Bacteriol. 108,751-756 Hochstein, L. I. & Dalton, B. P. (1967) Biochim. Biophys. Acta 139, 56-68 Holcenberg, J. S. & Stadtman, E. R. (1969) J. Biol. Chem. 244, 11941203 Jones, M. V. & Hughes, D. E. (1972) Biochem. J. 129, 755-761 Jones, A. H. & Trudgill, P. W. (1967) Biochem. J . 105, 3 1 ~ Kakinuma, A. & Yamatodani, S . (1964) Nature (London) 201,420-421 Kaneda, T. (1974) Biochem. Biophys. Res. Commun. 58, 14C144 Kitcher, J. P., Trudgill, P. W. & Rees, J. S. (1972) Biochem. J. 130, 121-132 Meng, K. & Kroneberg, G. (1967) Arzeim. Forsch. 17, 659-665 Norris, D. B. & Trudgill, P. W. (1971) Biochem. J. 121, 363-370 Ornston, L. N. & Stanier, R. Y. (1966) J. Biol. Chem. 241, 3776-3786 Posternak, T., Reymond, D. & Friedli, M. (1965) Helu. Chim. Acta 38, 205-212 Rosenberg, E. & Holmes, P. (1965) J. Bacteriol. 89, 1212-1216 Smith, D. I. & Callely, A. G. (1975) J. Gen. Microbiol. 91, 210-212 Trudgill, P. W. (1968) Biochem. J. 109, 7~ Trudgill, P. W . (1969) Biochem. J. 113, 577-587 Trudgill, P. W., DuBus, R. & Gunsalus, I. C. (1966) J. Biol. Chem. 241, 11941205 Yu, C. A. & Gunsalus, I. C. (1969) J. Biol. Chem. 244, 6149-6152 Yugari, Y. (1961) Biken J. 4, 197-207
68 citations
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01 Nov 2003-Journal of Environmental Science and Health Part B-pesticides Food Contaminants and Agricultural Wastes
TL;DR: Two sulfonylurea herbicides, chlorsulfuron and metsulfuron‐methyl, were studied under laboratory conditions, in order to elucidate the biodegradation pathway operated by Aspergillus niger, a common soil fungus, which is often involved in the degradation of xenobiotics.
Abstract: Two sulfonylurea herbicides, chlorsulfuron and metsulfuron-methyl, were studied under laboratory conditions, in order to elucidate the biodegradation pathway operated by Aspergillus niger, a common soil fungus, which is often involved in the degradation of xenobiotics. HPLC-UV was used to study the kinetic of degradation, whereas LC-MS was used to identify the metabolites structure. In order to avoid the chemical degradation induced by a decrease in pH, due to the production of citric acid by the fungus, the experiments were performed in a buffered neutral medium. No significant degradation for both compounds was observed in mineral medium with 0.2% sodium acetate. On the contrary, in a rich medium, after 28 days the degradations, chemical degradation excluded, were about 30% for chlorsulfuron and 33% for metsulfuron-methyl. The main microbial metabolites were obtained via cleavage of the sulfonylurea bridge. In addition the fungus seems to be able to hydroxylate the aromatic ring of chlorsulfuron. In the case of metsulfuron-methyl the only detected metabolite was the triazine derivative, while the aromatic portion was completely degraded. Finally, the demethylation of the methoxy group on the triazine ring, previously observed with a Pseudomonas fluorescens strain, was not observed with A. niger.
67 citations