1887

Abstract

Strain D40P, representing a novel Gram-stain-negative, obligately aerobic, bacteriochlorophyll -containing bacterium of the α-4 subgroup of the phylum , was isolated from permafrost soil of Kunlun mountains gap, Qinghai-Tibet plateau. Cells were non-motile rod–cocci and formed brown-pigmented colonies. According to the absorption spectrum, carotenoids and two different photosynthetic light-harvesting complexes, an LHI complex and a B800-835-type peripheral LHII complex, were present in the cells. The strain was oxidase-negative and catalase-positive. The predominant fatty acids of strain D40P were summed feature 3 (Cω7 and/or Cω6), Cω6 and summed feature 8 (Cω7 and/or Cω6). The main polar lipids were phosphatidylethanolamine, phosphatidylglycerol, unidentified phospholipid, two glycolipids and sphingoglycolipid. The major respiratory quinone was ubiquinone-10, whereas ubiquinone-9 was present in smaller amounts. The 16S rRNA gene sequence similarity to the closest phylogenetic relative, JCM 18140, was 97.5 %. DNA–DNA relatedness ( ) between strain D40P and was 12.4 °C. The G+C content of the genomic DNA of strain D40P was 67.4 mol%. Accordingly, the strain represents a novel species, for which the name sp. nov. is proposed. The type strain is D40P ( = CGMCC 1.12714 = JCM 19740). An emended description of the genus is also proposed.

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2015-11-01
2024-03-28
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