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Abstract
A Gram-reaction-negative, rod-shaped, non-motile, red-pigmented, radiation-resistant, aerobic bacterium designated T-3T was isolated from a soil sample from the Qinghai–Tibet Plateau in Tibet, China, after exposure to 10 kGy gamma radiation. Phylogenetic analysis based on 16S rRNA sequences indicated that this isolate represented a novel member of the genus Hymenobacter . Sequence identities of the 16S rRNA gene of strain T-3T with the type strains of species of the genus Hymenobacter with validly published names range from 89 % to 97 %, and the most closely related species is Hymenobacter psychrotolerans Tibet-IIU11T (97 %). The DNA–DNA relatedness between strain T-3T and H. psychrotolerans is 59.10 %. The major fatty acids of strain T-3T were iso-C15 : 0 (27.66 %), summed feature 4 (iso-C17 : 1I and/or anteiso-C17 : 1B, 15.84 %), anteiso-C15 : 0 (14.08 %) and summed feature 3 (C16 : 1ω7c and/orC16 : 1ω6c, 12.38 %). The major menaquinone of strain T-3T was MK-7. Phosphatidylethanolamine (PE) was predominant in the polar lipid profile. The G+C content of the DNA of strain T-3T was 69.17 mol%. On the basis of the results of the polyphasic characterization presented in this study, it is concluded that strain T-3T represents a novel species of the genus Hymenobacter , for which the name Hymenobacter kanuolensis is proposed. The type strain is T-3T ( = ACCC 05760T = KCTC 32407T).
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Funding
- Ministry of Science and Technology of China (Award 2012AA063503, 2010CB126504 and 2013CB733900)
- National Natural Science Foundation of China (Award 31170105)
- Important National Science & Technology Specific Projects (Award 2011ZX08009-003 and 2011ZX08012-001)