A Gram-positive, non-motile, spherical, red-pigmented and facultatively anaerobic bacterium, designated strain I-0, was isolated from a sand sample of the Gobi desert in Xinjiang Autonomous Region, China. Phylogenetic analysis based on 16S rRNA gene sequences indicated that this isolate represents a novel member of the genus , with low sequence similarities (<94 %) to recognized species. The major cellular fatty acids were C 7 and C. Its polar lipid profile contained several unidentified glycolipids, phosphoglycolipids, phospholipids, pigments and an aminophospholipid. The peptidoglycan type was Orn–Gly (A3) and the predominant respiratory quinone was MK-8. The DNA G+C content was 65.4 mol%. DNA–DNA relatedness between strain I-0 and ACCC 10492 was 37 %. The strain was shown to be extremely resistant to gamma radiation (>15 kGy) and UV light (>600 J m). On the basis of the phylogenetic, chemotaxonomic and phenotypic data presented, strain I-0 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is I-0 (=DSM 21396 =CGMCC 1.7299).


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Morphology of colonies of strain I-0 on a TGY agar plate. Captured by Olympus SZX7.


Morphology of cells of strain I-0 , captured by Hitachi S-570 scanning electron microscope. Bar, 2 µm.


Ultrastructure of strain I-0 grown in TGY medium. (a) Wall structure composed of four layers (L1–L4). Bar, 333 nm. (b) Division and a large electron-dense granule (D); arrowheads (A) indicate the form of the cell wall. Bar, 400 nm. (c) Cells in pairs, showing a large electron-dense granule (D), cell membrane (M) and cell wall (W). Bar, 250 nm.


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