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Int J Syst Evol Microbiol 58 (2008), 1556-1560; DOI  10.1099/ijs.0.65513-0
© 2008 International Union of Microbiological Societies

Streptomonospora halophila sp. nov., a halophilic actinomycete isolated from a hypersaline soil

Man Cai1,{dagger}, Xiao-Yang Zhi1,{dagger}, Shu-Kun Tang1, Yu-Qin Zhang1,2, Li-Hua Xu1 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 650091, PR China
2 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

An actinomycete strain, designated YIM 91355T, was isolated from a soil sample collected from a hypersaline soil in Xinjiang Province, China, and its taxonomic position was investigated by using a polyphasic approach. The strain grew well on most media tested and no diffusible pigment was produced. The aerial mycelium of this organism was well developed but not fragmented and, at maturity, formed short chains of spores. Substrate mycelium was branched with non-fragmenting hyphae and single, oval to round spores were formed, borne on sporophores. Strain YIM 91355T contained meso-diaminopimelic acid as the diagnostic amino acid. The purified cell-wall hydrolysate contained galactose. The predominant menaquinones were MK-10(H8) (43.2 %), MK-10(H6) (17.7 %) and MK-11(H8) (10.4 %). Phospholipids were phosphatidylglycerol, diphosphatidylglycerol, phosphatidylinositol mannosides, phosphatidylcholine, phosphatidylinositol and an unidentified phospholipid. The major fatty acids were i-C16 : 0, ai-C17 : 0, 10-methyl C17 : 0 and 10-methyl C18 : 0. The G+C content of the genomic DNA was 72.1 mol%. Phylogenetic analysis indicated that the isolate belongs to the genus Streptomonospora of the family Nocardiopsaceae. Based on phenotypic and genotypic data, it is concluded that strain YIM 91355T represents a novel species of the genus Streptomonospora, for which the name Streptomonospora halophila sp. nov. (type strain YIM 91355T =DSM 45075T =KCTC 19236T) is proposed.

Abbreviations: DAP, diaminopimelic acid

{dagger}These authors contributed equally to this work.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain YIM 91355T is EF423989.






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