Abstract
Two moderately halophilic strains SBS 10T and SSO 06 were isolated from the saltern crystallizer ponds of the hypersaline Sambhar Salt Lake in India. Strains were aerobic, Gram-stain-negative, and rod shaped. Phylogenetic analysis based on the 16S rRNA gene sequences indicated that two strains belong to the genus Halomonas in the Gammaproteobacteria, with highest 16S rRNA gene sequence similarities with Halomonas gudaonensis LMG 23610T (98.2% similarity) and Halomonas campaniensis 5AGT (99.0% similarity). Strains grew optimally at 37 °C, pH 7.5–8.0 in the presence of 5–8% (w/v) NaCl. The major fatty acids of the strain SBS 10T were C18:1ω7c (54.37%), C16:0 (25.69%), C16:1 × 7c/C16:1 × 6c (13.28%), and C12:0 (1.21%). The G+C content was 63.6 mol % (Tm). Phenotypic features, fatty acids profile, and DNA G+C content supported placement of the strain SBS 10T in the genus Halomonas having distinct characteristics with related strains. Analysis of the housekeeping genes: gryB and rpoD and in silico DNA-DNA hybridization between the strain SBS 10T and its type strain Halomonas gudaonensis (LMG 23610T) further revealed the strain SBS 10T to be a distinct species. On the basis of the phenotypic, chemotaxonomic and phylogenetic analysis, the strain SBS 10T is considered to represent a novel species for which the name Halomonas sambharensis is proposed. The type strain is SBS 10T (= MTCC 12313T = LMG 30344T).
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Acknowledgements
The authors would like to thank Belgium Coordinated Collection of Microorganisms (BCCM), Gent, Belgium and CSIR-Institute of Microbial Technology, Chandigarh, India for providing the necessary facilities for deposition of culture in the general repository. The authors would also like to thank MNIT, Jaipur for Transmission Electron Microscopy.
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BK conducted the experiments. IJ and KJ prepared the manuscript. All authors approved the manuscript and its submission.
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The type strain, SBS 10T (= MTCC 12313T = LMG 30344T), and the strain SSO 06 (= MTCC 12312 = LMG 30343) were isolated from the saltern crystallizer ponds of the hypersaline Sambhar Salt Lake in India.
The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequence of the strain SBS 10T is KT796562. The accession number for the draft genome sequences of the strain SBS 10T is RXHI00000000.
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Kushwaha, B., Jadhav, I. & Jadhav, K. Halomonas sambharensis sp. nov., a Moderately Halophilic Bacterium Isolated from the Saltern Crystallizer Ponds of the Sambhar Salt Lake in India. Curr Microbiol 77, 1125–1134 (2020). https://doi.org/10.1007/s00284-020-01892-w
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DOI: https://doi.org/10.1007/s00284-020-01892-w