Bacterial Pathways for Degradation of Nitroaromatics

Symons, Zoe C.; Bruce, Neil C.

doi:10.1002/chin.200714271

Cited by 15 publications

(19 citation statements)

References 1 publication

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“…The principal biological route by virtue of which aromatic compounds are transformed is oxidation; however, the presence of functional groups, like three electron-withdrawing nitro-groups around the ring, may hinder the degradation process, rendering such compounds resistant to biodegradation (Symons and Bruce 2006). The need of the time is to modify phytoremediation to make it a competitive alternative to current methods of pollutant-degradation.…”

Section: Analysis Of Metagenome Of Contaminated Environment and Hypermentioning

confidence: 99%

Phytoremediation: recent advances in plant-endophytic synergistic interactions

et al. 2015

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Background Plant-endophyte partnership provides an excellent gateway toward restoration of contaminated ecosystems. The interactions between both partners can be manipulated by introducing novel catabolic/ metabolic genes into host plant or endophytic bacteria genomes. The potential of the engineered organisms to degrade or accumulate contaminants is much wider than their wild relatives. Scope This review covers the recent developments for engineering catabolic/metabolic genes from a wide range of sources into plants or endophytic bacteria for the development of modified plant-endophyte interactions. Genetic alteration of plants promises enhanced catabolism by plant's own enzymatic machinery or greater contaminant uptake/accumulation for subsequent in planta detoxification by complementary endophytes. On the other hand, bacteria may also be engineered to enhance the potential for degradation or alteration of catabolic pathways, either to protect the host plant against phytotoxicity or to improve the overall efficiency of phytoremediation in planta, a situation especially suitable when hydrophilic compounds fail to be degraded by rhizospheric microbes due to the rapid uptake by plants. This is followed by discussion on kinetic parameters controlling phytoremediation. Conclusions It is hypothesized that transgenic approach can result in synergistic and effective plant-endophyte partnerships for wider-range and enhanced capabilities of degrading and/or detoxifying contaminants.

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Section: Analysis Of Metagenome Of Contaminated Environment and Hypermentioning

confidence: 99%

Phytoremediation: recent advances in plant-endophytic synergistic interactions

et al. 2015

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“…4-nitrophenol is a widely distributed xenobiotic nitroaromatic compound in the environment throughout the world, especially with the manufacture of drugs, dyes, pigments, plastics explosives, fungicide, industrial solvents and phosphororganic insecticides [1][2][3][4]. PNP may have the potential to leach through soil and enter groundwater; besides it is hardly degradable and persistently toxic to the environment [5].…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of p-nitrophenol by Rhodococcus sp. CN6 with high cell surface hydrophobicity

Zhang

Sun

et al. 2009

Journal of Hazardous Materials

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“…Microbial decontamination is an alternative way of physical-chemical methods, which are very expensive and less efficient (Dua et al 2002;Samanta et al 2002;Timmis and Pieper 1999). Microbial degradation of nitroaromatic compounds has been reported to occur either by reductive or oxidative mechanisms (Cartwright and Cain 1959a, b;MarvinSikkema and de Bont 1994;Mulla et al 2010;Qui et al 2007;Spain 1995;Symons and Bruce 2006;Walia et al 2002). Oxidative degradation of nitroaromatic compounds involves elimination of nitro group from aromatic system and the release of nitrite, catalysed by monooxygenases or dioxygenases (Jain et al 1994;Mulla et al 2010;Nadeau and Spain 1995;Spain and Gibson 1991;Spanggord et al 1991;Zeyer et al 1986).…”

Section: Introductionmentioning

confidence: 97%

Biodegradation of 3-Nitrobenzoate by Bacillus flexus strain XJU-4

Mulla

Manjunatha

Hoskeri

et al. 2010

World J Microbiol Biotechnol

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Bacillus flexus strain XJU-4 utilized 3-nitrobenzoate at 12 mM as a sole source of carbon and energy. This strain also utilized 4-nitrobenzoate, 2-nitrotoluene and nitrobenzene as growth substrates. The optimum conditions for degradation of 3-nitrobenzoate by the organism were found to be at pH 7.0 and temperature 30°C. Metabolite analysis, growth and enzymatic studies have revealed that the organism degraded 3-nitrobenzoate by oxidative mechanism through protocatechuate with the release of nitrite. The cells grown on 3-nitrobenzoate utilized protocatechuate but not 3-hydroxybenzoate, 3-aminobenzoate, 4-hydroxy-3-nitrobenzoate and 4-nitrocatechol. The cell-free extract of Bacillus flexus strain XJU-4 grown on 3-nitrobenzoate contained the activity of protocatechuate 2,3-dioxygenase, which suggest that protocatechuate was further degraded by a novel 2,3-dioxygenative meta-cleavage pathway.

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Bacterial Pathways for Degradation of Nitroaromatics

Abstract: ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

Cited by 15 publications

References 1 publication

Phytoremediation: recent advances in plant-endophytic synergistic interactions

Phytoremediation: recent advances in plant-endophytic synergistic interactions

Biodegradation of p-nitrophenol by Rhodococcus sp. CN6 with high cell surface hydrophobicity

Biodegradation of 3-Nitrobenzoate by Bacillus flexus strain XJU-4

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