Aerobic bacterial degradation of selected polyaromatic compounds and n-alkanes found in petroleum

Sˇepicˇ, E.; Leskovsˇek, H.; Trier, Colin

doi:10.1016/0021-9673(94)01032-a

Cited by 15 publications

(11 citation statements)

References 25 publications

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“…The initial step in the aerobic degradation of saturated, aliphatic (n-alkanes) compounds involves the oxygenase enzyme 'attacking' the terminal methyl group where a primary alcohol is formed. [8,26,27] Both strains were isolated from a HC contaminated sandy soil in Sicily and confirmed in all kinds of soils the degradation ability on medium and long chain HC that was already detected in mineral medium. [15] This ability depends on the presence of one or more AlkB-like alkanehydroxylase systems that were detected in both strains [15] and likely, on other undetected systems.…”

Section: Resultssupporting

confidence: 55%

Degradation of long-chainn-alkanes in soil microcosms by two actinobacteria

Pasquale

Palazzolo

Piccolo

et al. 2012

Journal of Environmental Science and Health, Part A

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The ability of two recently isolated actinobacteria, that degrade medium and long chain n-alkanes in laboratory water medium, was investigated in soil microcosms using different standard soils that were artificially contaminated with n-alkanes of different length (C(12)- C(20)- C(24)- C(30)). The two strains, identified as Nocardia sp. SoB and Gordonia sp. SoCp, revealed a similar high HC degradation efficiency with an average of 75% alkane degraded after 28 days incubation. A selectivity of bacteria towards n-alkanes of different length was detected as well as a consistent effect of soil texture and other soil physical chemical characteristics on degradation. It was demonstrated the specific aptitude of these selected strains towards specific environmental conditions.

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Section: Resultssupporting

confidence: 55%

Degradation of long-chainn-alkanes in soil microcosms by two actinobacteria

Pasquale

Palazzolo

Piccolo

et al. 2012

Journal of Environmental Science and Health, Part A

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“…Although the chemically inert alkanes are activated by the addition of fumarate (Heider et al, 1999;Widdel and Rabus, 2001;Wilkes et al, 2003) during anoxia, aerobic activation is accomplished by the terminal (Sepic et al, 1995;Koma et al, 2001;Van Hamme et al, 2003) or subterminal (Whyte et al, 1998;Kotani et al, 2006Kotani et al, , 2007 introduction of oxygen. For alkanes with a chain length oC 30 , which can be considered as typical for plant waxes, terminal oxygen introduction is mainly catalysed by the membrane bound, rubredoxin-dependent di-iron alkane monooxygenase (AlkB), which is found among Actinobacteria, a-, b-and g-Proteobacteria (van Beilen et al, 2003;van Beilen and Funhoff, 2007).…”

Section: Introductionmentioning

confidence: 99%

Plant litter and soil type drive abundance, activity and community structure of alkB harbouring microbes in different soil compartments

et al. 2012

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Alkanes are major constituents of plant-derived waxy materials. In this study, we investigated the abundance, community structure and activity of bacteria harbouring the alkane monooxygenase gene alkB, which catalyses a major step in the pathway of aerobic alkane degradation in the litter layer, the litter-soil interface and in bulk soil at three time points during the degradation of maize and pea plant litter (2, 8 and 30 weeks) to improve our understanding about drivers for microbial performance in different soil compartments. Soil cores of different soil textures (sandy and silty) were taken from an agricultural field and incubated at constant laboratory conditions. The abundance of alkB genes and transcripts (by qPCR) as well as the community structure (by terminal restriction fragment polymorphism fingerprinting) were measured in combination with the concentrations and composition of alkanes. The results obtained indicate a clear response pattern of all investigated biotic and abiotic parameters depending on the applied litter material, the type of soil used, the time point of sampling and the soil compartment studied. As expected the distribution of alkanes of different chain length formed a steep gradient from the litter layer to the bulk soil. Mainly in the two upper soil compartments community structure and abundance patterns of alkB were driven by the applied litter type and its degradation. Surprisingly, the differences between the compartments in one soil were more pronounced than the differences between similar compartments in the two soils studied. This indicates the necessity for analysing processes in different soil compartments to improve our mechanistic understanding of the dynamics of distinct functional groups of microbes.

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“…The role of indigenous microbial communities in the removal of hydrocarbons from the environment has been widely investigated showing that a small fraction of all natural microbial communities irrespective of location or prevailing environmental conditions can grow on both aromatic and aliphatic hydrocarbons (Sepic et al, 1995;Solano-Serena et al, 2000;Ruberto et al, 2003). The size of these populations of degrading microorganisms often reflects the historical exposure of the environment to either biogenic or anthropogenic hydrocarbon sources.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of phenanthrene by indigenous microorganisms in soils from Livingstone Island, Antarctica

Okere

Cabrerizo

Dachs

et al. 2012

FEMS Microbiol Lett

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Biodegradation of polycyclic aromatic hydrocarbons (PAHs) in soils has been linked to history of exposure to PAHs and prevailing environmental conditions. This work assessed the capacity of indigenous microorganisms in soils collected in Livingstone Island (South Shetlands Islands, Antarctica) with no history of pollution (∑PAHs: 0.14-1.47 ng g(-1) dw) to degrade (14) C-phenanhthrene at 4, 12 and 22 °C. The study provides evidence of the presence of phenanthrene-degrading microorganisms in all studied soils. Generally, the percentage of (14) C-phenanhthrene mineralized increased with increasing temperature. The highest extent of (14) C-phenanhthrene mineralization (47.93%) was observed in the slurried system at 22 °C. This work supports findings of the presence of PAH-degrading microorganisms in uncontaminated soils and suggests the case is the same for uncontaminated Antarctic remote soils.

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Aerobic bacterial degradation of selected polyaromatic compounds and n-alkanes found in petroleum

Cited by 15 publications

References 25 publications

Degradation of long-chainn-alkanes in soil microcosms by two actinobacteria

Degradation of long-chainn-alkanes in soil microcosms by two actinobacteria

Plant litter and soil type drive abundance, activity and community structure of alkB harbouring microbes in different soil compartments

Biodegradation of phenanthrene by indigenous microorganisms in soils from Livingstone Island, Antarctica

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