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Int J Syst Evol Microbiol 59 (2009), 2471-2475; DOI  10.1099/ijs.0.007682-0
© 2009 International Union of Microbiological Societies

Streptomonospora amylolytica sp. nov. and Streptomonospora flavalba sp. nov., two novel halophilic actinomycetes isolated from a salt lake

Man Cai1, Shu-Kun Tang1, Yi-Guang Chen1,2, Yan Li1, Yu-Qin Zhang1,3 and Wen-Jun Li1

1 The Key Laboratory for Microbial Resources of the Ministry of Education, Laboratory for Conservation and Utilization of Bio-Resources, Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan 650091, PR China
2 College of Bio-resources and Environmental Science, Jishou University, Jishou, Hunan 416000, PR China
3 Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, PR China

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

Two novel halophilic, aerobic, catalase-positive but oxidase-negative, Gram-positive actinomycetes, designated YIM 91353T and YIM 91394T, were isolated from a salt lake in the north-west of China. Phylogenetic analyses based on 16S rRNA gene sequences indicated that the novel isolates should be assigned to the genus Streptomonospora. The phenotypic and chemotaxonomic characteristics of the isolates also matched those described for members of the genus Streptomonospora. The predominant menaquinones were MK-10(H8), MK-10(H6) and MK-9(H8), and meso-diaminopimelic acid was the diagnostic amino acid in the cell walls. The phospholipids of the isolates consisted of diphosphatidylglycerol, phosphatidylcholine, phosphatidylglycerol, phosphatidylinositol and phosphatidylinositol mannosides. The major fatty acids of strain YIM 91353T were anteiso-C17 : 0 and C18 : 0, and of strain YIM 91394T were anteiso-C17 : 0 and iso-C16 : 0. The DNA G+C contents were 71.2 and 72.5 mol%, respectively. The combination of phylogenetic analysis, DNA–DNA hybridization data, phenotypic characteristics and chemotaxonomic differences supported the view that strains YIM 91353T and YIM 91394T each represent a novel species of the genus Streptomonospora, for which the names Streptomonospora amylolytica sp. nov. and Streptomonospora flavalba sp. nov. are proposed, with type strains YIM 91353T (=DSM 45171T=CCTCC AA 208048T) and YIM 91394T (=DSM 45155T=CCTCC AA 208047T), respectively.

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains YIM 91353T and YIM 91394T are EU442551 and EU442553, respectively.

A figure showing minimum-evolution and maximum-parsimony 16S rRNA gene sequence phylogenies and a table showing the fatty acid compositions of strains YIM 91353T and YIM 91394T and other members of the genus Streptomonospora are available as supplementary material with the online version of this paper.






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