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Int J Syst Evol Microbiol 58 (2008), 1467-1471; DOI  10.1099/ijs.0.65673-0
© 2008 International Union of Microbiological Societies

Rhodococcus kunmingensis sp. nov., an actinobacterium isolated from a rhizosphere soil

Yong-Xia Wang1,{dagger}, Hai-Bin Wang2,{dagger}, Yu-Qin Zhang1,3, Li-Hua Xu1, Cheng-Lin Jiang1 and Wen-Jun Li1

1 The Key Laboratory for Microbial Resources of the Ministry of Education, PR China, and Laboratory for Conservation and Utilization of Bio-Resources, Yunnan Institute of Microbiology, Yunnan University, Kunming 650091, PR China
2 Zhejiang Hisun Group Co., Ltd, Taizhou, Zhejiang 318000, PR China
3 Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, PR China

Correspondence
Wen-Jun Li
wjli{at}ynu.edu.cn
or
liact{at}hotmail.com

A Gram-positive, aerobic, non-motile actinobacterium strain, designated YIM 45607T, was isolated from a rhizosphere soil sample in Kunming, south-west China. Chemotaxonomically, the isolate contained chemical markers that supported its assignment to the genus Rhodococcus. On the basis of 16S rRNA gene sequence similarity analysis, strain YIM 45607T formed a new subline within the genus Rhodococcus, with Rhodococcus equi as its closest phylogenetic neighbour (98.2 % 16S rRNA gene sequence similarity to the type strain). However, DNA–DNA hybridization demonstrated that strain YIM 45607T was different from R. equi DSM 20307T (35.4 % relatedness). Based on polyphasic analysis, strain YIM 45607T could be clearly distinguished from other species of the genus Rhodococcus. The isolate therefore represents a novel species of Rhodococcus, for which the name Rhodococcus kunmingensis sp. nov. is proposed. The type strain is strain YIM 45607T (=KCTC 19149T =DSM 45001T).

{dagger}These authors contributed equally to this work.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain YIM 45607T is DQ997045.






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