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Int J Syst Evol Microbiol 57 (2007), 2578-2582; DOI  10.1099/ijs.0.65027-0
© 2007 International Union of Microbiological Societies

Streptomyces radiopugnans sp. nov., a radiation-resistant actinomycete isolated from radiation-polluted soil in China

Jun Mao1, Qiyong Tang1, Zhidong Zhang1, Wei Wang1, Dong Wei1, Ying Huang2, Zhiheng Liu2, Yuhu Shi1 and Michael Goodfellow3

1 Institute of Microbiology, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, Xinjiang Uigur Autonomous Region, PR China
2 State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China
3 Division of Biology, University of Newcastle, Newcastle upon Tyne NE1 7RU, UK

Correspondence
Ying Huang
huangy{at}im.ac.cn

The taxonomic position of an actinomycete isolated from radiation-polluted soil collected in Xinjiang Province, north-west China, was determined by using a polyphasic approach. The isolate, designated strain R97T, had chemical and morphological properties characteristic of streptomycetes. An almost-complete 16S rRNA gene sequence of the isolate was generated and compared with corresponding sequences of representative streptomycetes. The 16S rRNA data not only supported the classification of the strain in the genus Streptomyces but also showed that it represented a distinct phyletic line that was most closely, albeit loosely, associated with three other thermotolerant organisms, namely Streptomyces macrosporus NBRC 14748T, Streptomyces megasporus NBRC 14749T and Streptomyces thermolineatus NBRC 14750T. Strain R97T could be distinguished from these organisms based on a range of phenotypic properties. It is proposed that R97T (=CGMCC 4.3519T =DSM 41901T) be classified as the type strain of a novel species in the genus Streptomyces, Streptomyces radiopugnans sp. nov. The organism was shown to be resistant to 60Co gamma radiation at a dose of 15 kGy.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain R97T is DQ912930.

A figure showing the gamma-radiation survival curves of strain R97T, Deinococcus radiodurans DSM 20539T and Escherichia coli K12 is available as supplementary material with the online version of this paper.






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Copyright © 2007 by the International Union of Microbiological Societies.