Linking initial soil bacterial diversity and polycyclic aromatic hydrocarbons (PAHs) degradation potential

[Display omitted] •The presence of a large number of Betaproteobacteria correlates with a higher degradation of LMW PAHs.•The degradation of HMW PAHs correlates with metabolisms implying cytochrome P450.•A higher PAH biodegradation correlates with soil biological parameters much more than with soil...

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Bibliographic Details
Published in:Journal of hazardous materials 2018-10, Vol.359, p.500-509
Main Authors: Crampon, M., Bodilis, J., Portet-Koltalo, F.
Format: Article
Language:English
Subjects:
Bacteriology
Betaproteobacteria
Biodegradation
Biodiversity and Ecology
Ecotoxicology
Environmental Sciences
Life Sciences
Microbiology and Parasitology
PICRUSt
Polycyclic aromatic hydrocarbons
Toxicology
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Summary:[Display omitted] •The presence of a large number of Betaproteobacteria correlates with a higher degradation of LMW PAHs.•The degradation of HMW PAHs correlates with metabolisms implying cytochrome P450.•A higher PAH biodegradation correlates with soil biological parameters much more than with soil physico-chemical parameters.•LMW PAHs are more probably degraded through direct metabolism of few specific strains.•HMW PAHs degradation potential could be estimated by PICRUSt approach. The aim of this study was to understand the role of indigenous soil microbial communities on the biodegradation of polycyclic aromatic hydrocarbons (PAHs) and to determine whether PAHs degradation potential in soils may be evaluated by analysis of bacterial diversity and potential metabolisms using a metagenomics approach. Five different soils were artificially contaminated with seven selected PAHs and the most abundant bacterial taxa were assessed by sequencing the 16S rRNA gene, and linking them to PAH biodegradation efficiencies. A PICRUSt approach was then led to estimate the degradation potentials by metagenomics inference. Although the role of bacteria in PAHs degradation is not directly established here, the presence of a large number of bacteria belonging to the Betaproteobacteria class correlated to a higher degradation of LMW PAHs. A link with specific bacterial taxa was more difficult to establish concerning HMW PAHs, which seemed to require more complex mechanisms as shown by PICRUSt.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2018.07.088