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Pseudorhodobacter psychrotolerans sp. nov., a psychrotolerant bacterium isolated from terrestrial soil, and emended description of the genus Pseudorhodobacter

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Title
Pseudorhodobacter psychrotolerans sp. nov., a psychrotolerant bacterium isolated from terrestrial soil, and emended description of the genus Pseudorhodobacter
Authors
Lee, Yung Mi
Yang, Jae Young
Baek, Kiwoon
Han, Se Jong
Shin, Seung Chul
Hwang, Chung Yeon
Hong, Soon Gyu
Lee, Hong Kum
Subject
Microbiology
Keywords
Pseudorhodobacter psychrotolerans sp. nov; Polyphasic taxonomy; Proteobacteria
Issue Date
2015
Citation
Lee, Yung Mi, et al. 2015. "Pseudorhodobacter psychrotolerans sp. nov., a psychrotolerant bacterium isolated from terrestrial soil, and emended description of the genus Pseudorhodobacter"., 66: 1068-1073.
Abstract
A Gram-stain-negative, facultatively aerobic, cream-coloured, ovoid-shaped, non-motile and psychrotolerant bacterial strain, PAMC 27389T, was isolated from terrestrial soil collected on King George Island, Antarctica. Phylogenetic analysis based on the 16S rRNA gene sequence revealed that strain PAMC 27389T belongs to the genus Pseudorhodobacter, sharing highest similarities with the type strains of Pseudorhodobacter wandonensis (96.9 %), Pseudorhodobacter antarcticus (96.8 %), Pseudorhodobacter ferrugineus (96.5 %) and Pseudorhodobacter aquimaris (95.4 %). Average nucleotide identity values between strain PAMC T and the type strains of P. wandonensis, P. antarcticus, P. ferrugineus and P. aquimaris were 70.8, 70.9, 71.0 and 70.5 %, respectively and the genome-to-genome distances were 18.4 - 19.1 %, indicating PAMC 27389T is clearly distinguished from the most closely related Pseudorhodobacter species. The genomic DNA G+C content was 60.1 mol%. Strain PAMC T grew at 0 - 37 8C (optimally at 15 - 20 8C), at pH 5.5 - 9.0 (optimally at pH 6.5 - 7.0) and in the presence of 0.5 - 3.0 % (w/v) sea salt (optimally with 0.5 %). It lacked bacteriochlorophyll a. The major fatty acids (.5 %) were summed feature 8 (C18 : 1v7c and/or C18 : 1v6c) and C18 : 1v7c 11-methyl. The major polar lipids were phosphatidylcholine, phosphatidylglycerol, an unidentified phospholipid, an unidentified aminolipid, an unidentified lipid and three unidentified aminophospholipids. The major respiratory quinone was Q-10. Based on the phenotypic, chemotaxonomic and genomic data presented, we propose the name Pseudorhodobacter psychrotolerans sp. nov. with the type strain PAMC 27389T (=KCTC42640T=JCM 30764T)
DOI
http://dx.doi.org/10.1099/ijsem.0.000841
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