Deinococcus soli sp. nov., a gamma- and UV-radiation-resistant bacterium from north-west China

Abstract

An ionizing- and UV-radiation-resistant bacterial strain, designated ZLM-202T, was isolated from an arid soil sample collected from Xinjiang Province, north-west China. The soil sample was irradiated before serial dilution plating was performed using twofold-diluted marine agar. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain ZLM-202T was a member of the genus Deinococcus, exhibiting sequence similarities of 86.3–92.2% to the type strains of recognized Deinococcus species. Strain-ZLM-202T was strictly aerobic and showed optimum growth at 30–37°C and pH 7.0. The major respiratory menaquinone was MK-8. The major fatty acids were 16:1 ω7c, 16: 0, 15: 1 ω6c, 15: 0 iso and 16: 1 ω5c. L-ornithine was detected in its peptidoglycan. The polar lipid profile consisted mainly of various unknown phosphoglycolipids, aminophospholipids, glycolipids and phospholipids. The DNA G + C content was 65.5 mol. %. The strain was shown to be extremely resistant to gamma radiation (>10 kGy) and UV light (>600 J m−2). On the basis of the phylogenetic, chemotaxonomic and phenotypic data, strain ZLM-202T represents a novel species of the genus Deinococcus, for which the name Deinococcus soli sp. nov. is proposed. The type strain is ZLM-202T (=CCTCC AB 208223T=KCTC 13419T).

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Correspondence to Cheng-Xiang Fang.

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Zhang, L., Qin, BF., Wang, Y. et al. Deinococcus soli sp. nov., a gamma- and UV-radiation-resistant bacterium from north-west China. Microbiology 80, 826–833 (2011). https://doi.org/10.1134/S0026261711060130

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Keywords

  • Deinococcus soli sp. nov.
  • north-west China
  • phylogenetic analysis
  • gamma radiation