Community structure and PAH ring-hydroxylating dioxygenase genes of a marine pyrene-degrading microbial consortium

Marine microbial consortium UBF, enriched from a beach polluted by the Prestige oil spill and highly efficient in degrading this heavy fuel, was subcultured in pyrene minimal medium. The pyrene-degrading subpopulation (UBF-Py) mineralized 31 % of pyrene without accumulation of partially oxidized int...

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Veröffentlicht in:Biodegradation (Dordrecht) 2014-07, Vol.25 (4), p.543-556
Hauptverfasser: Gallego, Sara, Vila, Joaquim, Tauler, Margalida, Nieto, José María, Breugelmans, Philip, Springael, Dirk, Grifoll, Magdalena
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container_issue 4
container_start_page 543
container_title Biodegradation (Dordrecht)
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creator Gallego, Sara
Vila, Joaquim
Tauler, Margalida
Nieto, José María
Breugelmans, Philip
Springael, Dirk
Grifoll, Magdalena
description Marine microbial consortium UBF, enriched from a beach polluted by the Prestige oil spill and highly efficient in degrading this heavy fuel, was subcultured in pyrene minimal medium. The pyrene-degrading subpopulation (UBF-Py) mineralized 31 % of pyrene without accumulation of partially oxidized intermediates indicating the cooperation of different microbial components in substrate mineralization. The microbial community composition was characterized by culture dependent and PCR based methods (PCR-DGGE and clone libraries). Molecular analyses showed a highly stable community composed by Alphaproteobacteria (84 %, Breoghania , Thalassospira , Paracoccus, and Martelella ) and Actinobacteria (16 %, Gordonia ). The members of Thalasosspira and Gordonia were not recovered as pure cultures, but five additional strains, not detected in the molecular analysis, that classified within the genera Novosphingobium, Sphingopyxis, Aurantimonas ( Alphaproteobacteria ) , Alcanivorax ( Gammaproteobacteria ) and Micrococcus ( Actinobacteria ), were isolated. None of the isolates degraded pyrene or other PAHs in pure culture. PCR amplification of Gram-positive and Gram-negative dioxygenase genes did not produce results with any of the cultured strains. However, sequences related to the NidA3 pyrene dioxygenase present in mycobacterial strains were detected in UBF-Py consortium, suggesting the representative of Gordonia as the key pyrene degrader, which is consistent with a preeminent role of actinobacteria in pyrene removal in coastal environments affected by marine oil spills.
doi_str_mv 10.1007/s10532-013-9680-z
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PCR amplification of Gram-positive and Gram-negative dioxygenase genes did not produce results with any of the cultured strains. However, sequences related to the NidA3 pyrene dioxygenase present in mycobacterial strains were detected in UBF-Py consortium, suggesting the representative of Gordonia as the key pyrene degrader, which is consistent with a preeminent role of actinobacteria in pyrene removal in coastal environments affected by marine oil spills.</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><pmid>24356981</pmid><doi>10.1007/s10532-013-9680-z</doi><tpages>14</tpages></addata></record>
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source MEDLINE; SpringerLink Journals - AutoHoldings
subjects Actinobacteria
Alcanivorax
Analysis
Aquatic Pollution
Bacteria - genetics
Bacteria - isolation & purification
Bacteria - metabolism
Beaches
Biodegradation
Biodegradation of pollutants
Biodegradation, Environmental
Biological and medical sciences
Biomedical and Life Sciences
Biotechnology
Coastal environments
Community composition
Community structure
Consortia
Denaturing Gradient Gel Electrophoresis
Dioxygenases - genetics
Environment and pollution
Fundamental and applied biological sciences. Psychology
Genes
Genes, Bacterial
Geochemistry
Gordonia
Heterotrophic Processes
Hydroxylation
Industrial applications and implications. Economical aspects
Life Sciences
Marine
Microbial Consortia - genetics
Microbiology
Micrococcus
Mineralization
Molecular Sequence Data
Mycobacterium
Novosphingobium
Oil pollution
Oil spills
Original Article
Paracoccus
Phenanthrenes - metabolism
Phylogeny
Polycyclic Aromatic Hydrocarbons - metabolism
Pyrene
Pyrenes - metabolism
RNA, Ribosomal, 16S - genetics
Seawater - microbiology
Sequence Analysis, DNA
Soil Science & Conservation
Sphingopyxis
Terrestrial Pollution
Waste Management/Waste Technology
Waste Water Technology
Water Management
Water Pollution Control
title Community structure and PAH ring-hydroxylating dioxygenase genes of a marine pyrene-degrading microbial consortium
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