<Emphasis Type="Italic">Deinococcus soli</Emphasis> sp. nov., a gamma- and UV-radiation-resistant bacterium from north-west China |
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Authors: | Lei Zhang Bao-Fu Qin Yang Wang Cheng-Xiang Fang |
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Institution: | 1.College of Life Sciences,Northwest A and F University,Yangling Shaanxi,P.R. China;2.College of Life Sciences,Wuhan University,Wuhan,P.R. China |
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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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