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Published online ahead of print on 2 October 2009 as doi:ijs.0.015917-0
Int J Syst Evol Microbiol (2009); DOI 10.1099/ijs.0.015917-0
© 2009 International Union of Microbiological Societies
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Deinococcus wulumuqiensis sp. nov., and Deinococcus xibeiensis sp. nov., isolated from radiation-polluted soil

Wei Wang1, Jun Mao1, Zhidong Zhang1, Qiyong Tang1, Yuqing Xie1, Jing Zhu1, Lixin Zhang2, Zhiheng Liu2,4, Yuhu Shi1 and Michael Goodfellow3

1 Institute of Microbiology, Xinjiang Academy of Agricultural Sciences, Urumqi, PR China;
2 Drug Discovery Centre for TB, Institute of Microbiology, Chinese Academy of Sciences, Beijing;
3 School of Biology, University of Newcastle, Newcastle upon Tyne, UK

4 E-mail: zhliu{at}im.ac.cn

The taxonomic positions of two gamma and UV ray-resistant strains isolated from radiation-polluted soil in north-west China were determined in a polyphasic study. The organisms, designed R12 and R13, were Gram-positive, non-sporeforming cocci, which contained MK-8 as major respiratory quinine and C16:1{omega}7c, C16:0, C17:1{omega}8c as major fatty acids. The cell wall of R12 and R13 contained ornithine. Phylogenetic analysis based on 16S rDNA gene sequences and DNA-DNA hybridizations showed that R12 and R13 are members of novel species belonging to the genus Deinococcus, with Deinococcus radiodurans DSM 20539T as its closest relative, The isolates R12 and R13 shared 97% and 97.1% 16S rDNA gene similarity and 29.5 and 33.3% DNA: DNA relatedness with Deinococcus radiodurans DSM 20539T. The DNA G+C content of isolates R12 T and R13T were 66.7 and 63.8%, respectively. On the basis of phenotypic tests and other results, two species, Deinococcus wulumuqiensis sp. nov. (type strain R12T = CGMCC 1.8884T = NBRC105665T) and Deinococcus xibeiensis sp. nov. (type strain R13T = CGMCC 1.8885T = NBRC105666T), are proposed.






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