Abstract
A novel moderately halophilic, Gram-stain negative and aerobic bacterium, designated strain TBZ21T, was isolated from a water sample of Urmia Lake, Iran. Cells were observed to be non-motile rods with no flagellum, showing positive catalase and oxidase reactions. Strain TBZ21T was found to grow at 10–40 °C (optimum, 30 °C), at pH 7–10 (optimum, pH 8) and in the presence of 1–22% (optimum, 10%). The major fatty acids were identified as C19:0 cyclo ω8c, C16:0, Summed features 3 (C13:0 3-OH and/or iso-C15:1 H) and 8 (C18:1 ω7c and/or C18:1 ω6c) and C12:0 3-OH. The major polar lipids were identified as diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and an unidentified phosphoaminolipid. The genomic DNA G+C content of strain TBZ21T was determined to be 63.3 mol%. Phylogenetic analyses based on 16S rRNA gene sequences indicated that strain TBZ21T belongs to the genus Halomonas, and shows high sequence similarities to Halomonas fontilapidosi 5CRT (99.43%), Halomonas ventosae AL12T (98.64%), Halomonas sediminicola CPS11T (98.63%) and Halomonas aestuarii Hb3T (98.08%), and has low similarities (below 98.0%) with other members of the genus. The values of DNA–DNA relatedness between strain TBZ21T and the closely related strains H. fontilapidosi LMG 24455T and H. ventosae LMG 26187T were 42 ± 11% and 54 ± 16%, respectively. On the basis of phenotypic, chemotaxonomic and molecular characteristics, strain TBZ21T is concluded to represent a novel species of the genus Halomonas, for which the name Halomonas tabrizica sp. nov. is proposed. The type strain is TBZ21T (=LMG 25445T=DSM 23018T).
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Abbreviations
- KCCM:
-
Korean Culture Center of Microorganisms, Seoul, Republic of Korea
- LMG LMG:
-
Culture collection, Universiteit Gent, Gent, Belgium
- DDH DNA:
-
DNA hybridization
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Acknowledgements
The authors are grateful to M. Akbari Dibavar and Poladi for their kind assistance.
Funding
This work was supported by the National Research Foundation (2017M3C1B5019250) of Ministry of Science and ICT, Republic of Korea. Tabriz University of Medical Sciences, Iran.
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Vahed, S.Z., Forouhandeh, H., Tarhriz, V. et al. Halomonas tabrizica sp. nov., a novel moderately halophilic bacterium isolated from Urmia Lake in Iran. Antonie van Leeuwenhoek 111, 1139–1148 (2018). https://doi.org/10.1007/s10482-018-1018-8
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DOI: https://doi.org/10.1007/s10482-018-1018-8