title: Degradation of polycyclic aromatic hydrocarbons by microbial consortia enriched from three soils using two different culture media.
abstract: A consortium composed of many different bacterial species is required to efficiently degrade polycyclic aromatic hydrocarbons (PAH) in oil-contaminated soil. We obtained six PAH-degrading microbial consortia from three oil-contaminated soils using two different isolation culture media. Denaturing gradient gel electrophoresis (DGGE) and sequence analyses of amplified 16s rRNA genes confirmed the bacterial community was greatly affected by both the culture medium and the soil from which the consortia were enriched. Three bacterial consortia enriched using malt yeast extract (MYE) medium showed higher degradation rates of PAHs than consortia enriched using Luria broth (LB) medium. Consortia obtained from a soil and then added back to that same soil was more effective in degrading PAHs than adding, to the same soil, consortia isolated from other, unrelated soils. This suggests that inoculum used for bioremediation should be from the same, or very similar nearby soils, as the soil that is actually being bioremediated.
authors.affiliation: School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an, Shaanxi Province 710055, China.
authors.forename: Manli
authors.initials: M
authors.lastname: Wu
authors.forename: Liming
authors.initials: L
authors.lastname: Chen
authors.forename: Yongqiang
authors.initials: Y
authors.lastname: Tian
authors.forename: Yi
authors.initials: Y
authors.lastname: Ding
authors.forename: Warren A
authors.initials: WA
authors.lastname: Dick
mesh_terms: D001419:Bacteria / Q000235:genetics / Q000378:metabolism*; D001483:Base Sequence; D001673:Biodegradation, Environmental; D003470:Culture Media; D059013:Microbial Consortia / Q000235:genetics / Q000502:physiology*; D008969:Molecular Sequence Data; D059392:Petroleum Pollution; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000378:metabolism*; D012987:Soil / Q000737:chemistry*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*
chemical_list: D003470:Culture Media; D011084:Polycyclic Aromatic Hydrocarbons; D012987:Soil; D012989:Soil Pollutants