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Int J Syst Evol Microbiol 58 (2008), 1873-1877; DOI  10.1099/ijs.0.65518-0
© 2008 International Union of Microbiological Societies

Microlunatus aurantiacus sp. nov., a novel actinobacterium isolated from a rhizosphere soil sample

Yong-Xia Wang1, Man Cai1, Xiao-Yang Zhi1, Yu-Qin Zhang1,2, Shu-Kun Tang1, Li-Hua Xu1, Xiao-Long Cui1 and Wen-Jun Li1,3

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 Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, PR China
3 Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, PR China

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

A Gram-positive, aerobic, non-motile, mesophilic strain, designated YIM 45721T, was isolated from a rhizosphere soil sample in Yunnan Province, China. On the basis of 16S rRNA gene sequence similarity analysis, strain YIM 45721T was assigned to the genus Microlunatus and was most closely related to the type strain of Microlunatus phosphovorus (98.2 % 16S rRNA gene sequence similarity). Chemotaxonomic data, including cell-wall peptidoglycan structure, menaquinones and fatty acid profile, supported affiliation of strain YIM 45721T to the genus Microlunatus. Results of DNA–DNA hybridization and physiological and biochemical tests enabled strain YIM 45721T to be differentiated genotypically and phenotypically from M. phosphovorus. Therefore, strain YIM 45721T represents a novel species of the genus Microlunatus, for which the name Microlunatus aurantiacus sp. nov. is proposed. The type strain is YIM 45721T (=CCTCC AB 206067T=DSM 18424T).

Abbreviations: LL-DAP, LL-diaminopimelic acid

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain YIM 45721T is EF601828.






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