title: Study of a hexane-degrading consortium in a biofilter and in liquid culture: biodiversity, kinetics and characterization of degrading strains.
abstract: A gasoline-degrading consortium, originating from a Mexican soil, was used to study its hexane-degradation kinetics in liquid culture and in a biofilter with mineral support. The biodiversity of the consortium depending on the culture conditions and electron and energy source (gasoline, hexane in liquid or hexane in the biofilter) was analyzed using a 16S rRNA-based approach. Significant differences between the populations were observed, indicating a probable adaptation to the substrate. Two strains, named SP2B and SP72-3, isolated from the consortium, belonged to Actinomycetes and demonstrated a high metabolic potential in hexane degradation. Even though the SP2B strain was related to Rhodococcus ruber DSM 43338(T) by phylogenetic studies, it displayed enlarged metabolic properties in hexane and other short-alkane degradation compared with the collection strain.
authors.affiliation: Unité de Biodépollution et de Valorisation des Effluents Gazeux, Institut de Recherche pour le Développement, Universités de Provence et de la Méditerranée, Marseille, France.
authors.forename: Agnès
authors.initials: A
authors.lastname: Amouric
authors.forename: Frédéric
authors.initials: F
authors.lastname: Verhé
authors.forename: Richard
authors.initials: R
authors.lastname: Auria
authors.forename: Laurence
authors.initials: L
authors.lastname: Casalot
mesh_terms: D039903:Actinobacteria / Q000145:classification / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology; D001419:Bacteria / Q000145:classification* / Q000235:genetics* / Q000254:growth & development / Q000302:isolation & purification; D001673:Biodegradation, Environmental; D044822:Biodiversity; D002245:Carbon Dioxide / Q000032:analysis; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D006586:Hexanes / Q000378:metabolism*; D008969:Molecular Sequence Data; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012240:Rhodococcus / Q000145:classification / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology; D017422:Sequence Analysis, DNA; D012988:Soil Microbiology
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D006586:Hexanes; D012336:RNA, Ribosomal, 16S; D002245:Carbon Dioxide