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Int J Syst Evol Microbiol 59 (2009), 2084-2088; DOI  10.1099/ijs.0.002873-0
© 2009 International Union of Microbiological Societies

Novosphingobium indicum sp. nov., a polycyclic aromatic hydrocarbon-degrading bacterium isolated from a deep-sea environment

Jun Yuan1,2,{dagger}, Qiliang Lai2,{dagger}, Tianling Zheng1 and Zongze Shao2

1 Key Laboratory of Ministry of Education for Coast and Wetland Ecosystem Research, School of Life Sciences, Xiamen University, Xiamen 361005, PR China
2 Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen, PR China

Correspondence
Zongze Shao
shaozz{at}163.com
Tianling Zheng
wshwzh{at}jingxian.xmu.edu.cn

A novel polycyclic aromatic hydrocarbon (PAH)-degrading bacterium, strain H25T, which was isolated from deep-sea water of the Indian Ocean, was studied phenotypically, genotypically and phylogenetically. Strain H25T can utilize several PAHs including phenanthrene and fluoranthene as sole carbon sources. The 16S rRNA gene sequence of strain H25T showed the highest similarity with that of Novosphingobium naphthalenivorans TUT562T (96.3 %), and showed lower similarities (92.1–96.0 %) with other members of the genus Novosphingobium. The major fatty acids of strain H25T were C14 : 0 2-OH (3.2 %), C16 : 0 (13.6 %), C16 : 1{omega}7c (5.2 %), C18 : 0 (13.4 %) and C18 : 1{omega}7c (57.0 %), which accounted for 92.3 % of the total fatty acids. It had ubiquinone 10 as the major respiratory quinone and spermidine as the major polyamine. All these characteristics were consistent with those of recognized Novosphingobium species. Results of DNA–DNA hybridization experiments and BOX-PCR fingerprint comparisons also indicate that strain H25T represents a novel Novosphingobium species, for which the name Novosphingobium indicum sp. nov. is proposed. The type strain is H25T (=MCCC 1A01080T =CGMCC 1.6784T =LMG 24713T).

Abbreviations: PAH, polycyclic aromatic hydrocarbon

{dagger}These authors contributed equally to this work.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain H25T is EF549586.

A transmission electron micrograph of cells of strain H25T and details of rep-PCR profiles, cellular fatty acid contents, API 20NE and API ZYM test results and susceptibility to antimicrobial agents of strain H25T and related strains are available as supplementary material with the online version of this paper.






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