Bioremediation potential of microorganisms derived from petroleum reservoirs

•Metagenomic clones could degrade saturated hydrocarbons up to 47% in petroleum.•Metagenomic clones consumed more than 90% of some aromatic portion after 21 days.•Isolated strains could degrade n-alkanes with rates up to 99% after 21 days.•Bacterial strains and metagenomic clones showed high petrole...

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Published in:	Marine pollution bulletin Vol. 89; no. 1-2; pp. 191 - 200
Main Authors:	Dellagnezze, Bruna Martins, de Sousa, Gabriel Vasconcelos, Martins, Laercio Lopes, Domingos, Daniela Ferreira, Limache, Elmer E.G., de Vasconcellos, Suzan Pantaroto, da Cruz, Georgiana Feitosa, de Oliveira, Valéria Maia
Format:	Journal Article
Language:	English
Published:	Kidlington Elsevier Ltd 15-12-2014 Elsevier
Subjects:	Alkanes - metabolism Animal and plant ecology Animal, plant and microbial ecology Applied ecology Bacteria Bacteria - genetics Bacteria - metabolism Biodegradation of pollutants Biodegradation, Environmental Biological and medical sciences Bioremediation Biotechnology Brazil Chromatography, Gas Crude oil Cytochrome P-450 CYP4A - genetics Degradation Dietzia maris Ecotoxicology, biological effects of pollution Environment and pollution Fundamental and applied biological sciences. Psychology Gas chromatography Gas Chromatography-Mass Spectrometry Hydrocarbons, Aromatic - metabolism Industrial applications and implications. Economical aspects Marine Marine and brackish environment Metagenomic clones Microbial Consortia - genetics Microbial Consortia - physiology Micrococcus Micrococcus - metabolism Oil and Gas Fields - microbiology Petroleum - analysis Petroleum - metabolism Petroleum biodegradation Phenanthrene Phenanthrenes - metabolism Pools Reservoirs Sea water ecosystems Seawater Seawater - microbiology Strain Synecology Brazil Petroleum biodegradation Bioremediation Metagenomic clones Seawater Biodegradation Marine environment Reservoir Microorganism Petroleum Clone
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Summary:	•Metagenomic clones could degrade saturated hydrocarbons up to 47% in petroleum.•Metagenomic clones consumed more than 90% of some aromatic portion after 21 days.•Isolated strains could degrade n-alkanes with rates up to 99% after 21 days.•Bacterial strains and metagenomic clones showed high petroleum degradation potential. Bacterial strains and metagenomic clones, both obtained from petroleum reservoirs, were evaluated for petroleum degradation abilities either individually or in pools using seawater microcosms for 21days. Gas Chromatography–Flame Ionization Detector (GC–FID) and Gas Chromatography-Mass Spectrometry (GC–MS) analyses were carried out to evaluate crude oil degradation. The results showed that metagenomic clones 1A and 2B were able to biodegrade n-alkanes (C14 to C33) and isoprenoids (phytane and pristane), with rates ranging from 31% to 47%, respectively. The bacteria Dietzia maris CBMAI 705 and Micrococcus sp. CBMAI 636 showed higher rates reaching 99% after 21days. The metagenomic clone pool biodegraded these compounds at rates ranging from 11% to 45%. Regarding aromatic compound biodegradation, metagenomic clones 2B and 10A were able to biodegrade up to 94% of phenanthrene and methylphenanthrenes (3-MP, 2-MP, 9-MP and 1-MP) with rates ranging from 55% to 70% after 21days, while the bacteria Dietzia maris CBMAI 705 and Micrococcus sp. CBMAI 636 were able to biodegrade 63% and up to 99% of phenanthrene, respectively, and methylphenanthrenes (3-MP, 2-MP, 9-MP and 1-MP) with rates ranging from 23% to 99% after 21days. In this work, isolated strains as well as metagenomic clones were capable of degrading several petroleum compounds, revealing an innovative strategy and a great potential for further biotechnological and bioremediation applications.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0025-326X 1879-3363
DOI:	10.1016/j.marpolbul.2014.10.003