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Novosphingobium taihuense sp. nov., a novel aromatic-compound-degrading bacterium isolated from Taihu Lake, China

State Key Laboratory of Microbial Resources and Institute of Microbiology, Chinese Academy of Sciences, ZhongGuanCun, Haidian, Beijing 100080, PR China

Correspondence
Shuang-Jiang Liu
shuangjiang{at}hotmail.com

A novel aromatic-compound-degrading bacterium, strain T3-B9^T, was isolated from sediment of Taihu Lake, Jiangsu Province, south-east China. This bacterial isolate assimilated several aromatic compounds such as phenol, aniline, nitrobenzene, 4-chloronitrobenzene and phenanthrene. The taxonomy of strain T3-B9^T was studied by polyphasic methods. The organism showed a range of phenotypic and chemotaxonomic properties consistent with those of the genus Novosphingobium. The 16S rRNA gene sequence similarity of strain T3-B9^T to members of the genus Novosphingobium ranged from 91·6 to 97·5 %, and this isolate clustered phylogenetically with members of genus Novosphingobium. The DNA–DNA relatedness values of strain T3-B9^T to the most phylogenetically related species, Novosphingobium subterraneum DSM 12447^T, Novosphingobium aromaticivorans ATCC 700278^T and Novosphingobium stygium ATCC 700280^T, were 31, 33 and 14 %, respectively. The combined genotypic and phenotypic data show that strain T3-B9^T represents a novel species of the genus Novosphingobium, for which the name Novosphingobium taihuense sp. nov. is proposed. The type strain is T3-B9^T (=AS 1.3432^T=JCM 12465^T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain T3-B9^T is AY500142.

The polar lipid profile of strain T3-B9^T and a phylogenetic tree for Novosphingobium species constructed using the maximum-parsimony method are available as supplementary material in IJSEM Online.

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