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Hydrocarboniphaga effusa gen. nov., sp. nov., a novel member of the -Proteobacteria active in alkane and aromatic hydrocarbon degradation

Biotechnology Center for Agriculture and the Environment, Rutgers University, New Brunswick, NJ 08901-8520, USA

Correspondence
Gerben J. Zylstra
zylstra{at}aesop.rutgers.edu

Novel alkane-degrading strains of bacteria were isolated from soil contaminated with fuel oil from a leaking underground tank in New Jersey, USA. Two phenotypically similar strains (designated AP102 and AP103^T) possessed 16S rRNA sequences unique among the majority of known hydrocarbon-degrading bacteria. The 16S rRNA sequences showed a moderate but distant relationship to the genus Nevskia and a substantial similarity to strains that had previously been isolated for growth on phenol (in Japan) and on toluene (in Canada) by other researchers. The hydrocarbon-degrading strains from Japan, Canada and New Jersey showed no resemblance to the typical morphology of Nevskia but did share a striking similarity among themselves in cell morphology, in the unusual appearance of colonies on various solid media and in various physiological properties. A full taxonomic analysis was performed, including DNA–DNA hybridization and nutritional screening with 117 organic compounds as sole sources of carbon and energy. The strains are active in the degradation of important environmental pollutants, and their phenotypic, physiological, metabolic and genomic properties suggest that they are members of a novel taxon in the -Proteobacteria, for which the name Hydrocarboniphaga gen. nov. is proposed, with the single species Hydrocarboniphaga effusa sp. nov. The type strain is AP103^T (=ATCC BAA-332^T=DSM 16095^T).

The GenBank accession numbers for the 16S rRNA gene sequences of strains AP102 and AP103^T are AY363244 and AY363245, respectively.

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