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1 Yunnan Institute of Microbiology, Yunnan University, Kunming, Yunnan 650091, PR China
2 Agricultural Cultural Collection of China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100080, PR China
3 College of Bio-resources and Environmental Science, Jishou University, Jishou, Hunan 416000, PR China
Correspondence
Xiao-Long Cui
xlcuiynu{at}yahoo.com.cn or
xlcui{at}ynu.edu.cn
Two Gram-negatively stained, facultatively anaerobic, non-motile, vibrioid and rod-shaped, chemoheterotrophic bacterial strains, designated YIM D82T and YIM D812T, were isolated from a salt mine in Yunnan, south-west China. DNA–DNA hybridization, genomic DNA G+C content and phylogenetic analyses based on 16S rRNA gene sequences divided the two isolates into two distinct genospecies that were also clearly differentiated by fatty acid profiles, carbon source utilization patterns, antibiotic susceptibility and biochemical characteristics. The two isolates grew in the presence of 1.5–20 % NaCl, and optimally at 28 °C and pH 7.5. The genomic DNA G+C contents of strains YIM D82T and YIM D812T were 61.5 and 62.3 mol%, respectively. Phylogenetic analyses based on 16S rRNA gene sequences indicated that strains YIM D82T and YIM D812T were members of the family Rhodospirillaceae and showed 90.5–90.6 % and 90.1–90.2 % similarities with their closest relatives, Rhodovibrio sodomensis and Rhodovibrio salinarum, respectively. Differential phenotypic and genotypic characteristics of the two isolates from recognized genera showed that the two strains should be classified as representing a new genus and two novel species for which the names Fodinicurvata sediminis gen. nov., sp. nov. (type strain YIM D82T=DSM 21159T=KCTC 22351T) and Fodinicurvata fenggangensis sp. nov. (type strain YIM D812T=CCTCC AA 208037T=DSM 21160T) are proposed.
These authors contributed equally to this work.
The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains YIM D82T and YIM D812T are FJ357426 and FJ357427, respectively.
Two-dimensional thin-layer chromatograms of the polar lipids of strains YIM D82T and YIM D812T and a table showing the cellular fatty acid contents of strains YIM D82T and YIM D812T are available as supplementary material with the online version of this paper.
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