Metabolic Diversity in Bacterial Degradation of Aromatic Compounds

Phale, Prashant S.; Basu, Ashoke Kumar; Majhi, Prabin D.; Deveryshetty, Jaigeeth; Vamsee-Krishna, C.; Shrivastava, Rahul

doi:10.1089/omi.2007.0004

Cited by 71 publications

(34 citation statements)

References 251 publications

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“…These observations suggest that the active population responsible for COD removal has been lost during this time period. Aerobic degradation of aromatics is initiated by oxidation, making the compound susceptible to ring cleavage [22]. The most common route of degradation occurs via the central aromatic pathway, wherein the organic compounds are converted to catechols or substituted catechols, followed by ring fission that helps in complete mineralization [13].…”

Section: Discussionmentioning

confidence: 99%

Shifts in Microbial Community and Its Correlation with Degradative Efficiency in a Wastewater Treatment Plant

Kapley

Liu

Jadeja

et al. 2015

Appl Biochem Biotechnol

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A wastewater treatment plant controls the level of pollution reaching the environment. Yet, despite being the most common aerobic route for treatment of wastewater, the activated sludge process is not utilized to its full potential. This is mainly due to the lack of knowledge base correlating the microbial community in the activated sludge to its degradative performance. In this study, the activated biomass at the treatment site was monitored for five consecutive months. Even though operational parameters were kept constant, the microbial community was observed to change after 3 months. This shift was seen to correlate with 25 % loss of degradative efficiency. Target oxygenases were monitored at two time points, and results indicated that the dominating pathway operating in the common effluent treatment plant (CETP) is the degradation of chlorinated aromatics. This study demonstrates the change in degradative efficiency in a CETP with the change in microbial community and analyzes the parameters influencing the microbial community of activated sludge.

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Section: Discussionmentioning

confidence: 99%

Shifts in Microbial Community and Its Correlation with Degradative Efficiency in a Wastewater Treatment Plant

Kapley

Liu

Jadeja

et al. 2015

Appl Biochem Biotechnol

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“…In addition, many of the genes transferred between prokaryotes on a variety of MGE backbones include ecologically opportunistic genes that allow opportunities for innovation. For example, genes acquired by strains of E. coli have facilitated infections outside its typical environment of the gastrointestinal tract (Welch et al, 2002), or HGT of genes that degrade aromatic pollutants (Phale et al, 2007).…”

Section: Function Of Gene Transferred Between Organismsmentioning

confidence: 99%

Risks from GMOs due to Horizontal Gene Transfer

Keese¹

2008

Environ. Biosafety Res.

135

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Horizontal gene transfer (HGT) is the stable transfer of genetic material from one organism to another without reproduction or human intervention. Transfer occurs by the passage of donor genetic material across cellular boundaries, followed by heritable incorporation to the genome of the recipient organism. In addition to conjugation, transformation and transduction, other diverse mechanisms of DNA and RNA uptake occur in nature. The genome of almost every organism reveals the footprint of many ancient HGT events. Most commonly, HGT involves the transmission of genes on viruses or mobile genetic elements. HGT first became an issue of public concern in the 1970s through the natural spread of antibiotic resistance genes amongst pathogenic bacteria, and more recently with commercial production of genetically modified (GM) crops. However, the frequency of HGT from plants to other eukaryotes or prokaryotes is extremely low. The frequency of HGT to viruses is potentially greater, but is restricted by stringent selection pressures. In most cases the occurrence of HGT from GM crops to other organisms is expected to be lower than background rates. Therefore, HGT from GM plants poses negligible risks to human health or the environment.

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“…These effluents have a variety of unusual chemicals including a range of aromatic hydrocarbons and their derivatives (Van der Meer et al, 1992) which the microbes enzymatically decompose and utilize in cellular metabolism (Phale et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Isolation and characterization of a bacterial strain for aniline degradation

Ahmed¹,

Ahmed²,

Nisar³

et al. 2010

Afr. J. Biotechnol.

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Aniline, a serious environmental threat and health risk to living organisms is being released into the soil and water bodies owing to its expanded use in industry. The objective of the present study was to isolate a strain from rhizospheric soil samples of wheat (Triticum aestivum L.) taken from an agricultural site near the industrial area of Faisalabad, with the capability of degrading aniline with its maximum activity. The isolated strain was identified as Staphylococcus aureus ST1 a newly reported strain for aniline degradation. The strain ST1 showed tolerance up to 2000 ppm for aniline on mineral salt media plates and its degradative ability was checked through shake flasks experiments using HPLC. The strain was capable of degrading aniline and utilizing it as a sole source of carbon and energy. Maximum reduction of aniline concentration in medium up to 59.65% was observed after 72 h. An enhancement in biodegradation was observed using glucose as an additional growth substrate. The degradative products analyzed by HPLC were catechol, phenol and some other unknown compounds. Plasmid curing showed the involvement of plasmid encoded genes which was later followed by the isolation of plasmid DNA, which was found to be a large one of ~40 kb having restriction sites for enzymes (EcoRI, BamHI, ClaI, StuI, PstI, and HindIII) used.

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Metabolic Diversity in Bacterial Degradation of Aromatic Compounds

Cited by 71 publications

References 251 publications

Shifts in Microbial Community and Its Correlation with Degradative Efficiency in a Wastewater Treatment Plant

Shifts in Microbial Community and Its Correlation with Degradative Efficiency in a Wastewater Treatment Plant

Risks from GMOs due to Horizontal Gene Transfer

Isolation and characterization of a bacterial strain for aniline degradation

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