Abstract
The pink-colored and strictly aerobic bacterium strain, designated as TK19036T, was isolated from mesopelagic layer of the Southwest Indian Ocean. This novel isolate can grow at 10–45 °C (optimum, 30 °C), pH 6.0–8.0 (optimum, pH 7.0), and 2–14% NaCl concentrations (w/v) (optimum, 6%). The predominant respiratory quinone was Menaquinone-7. Major polar lipid profiles contained two aminolipids, aminophospholipid, two glycolipids, phosphatidylethanolamine, and three unknown polar lipids. The preponderant cellular fatty acids were iso-C15:0, C16:1 ω5c and iso-C17:0 3-OH. Phylogenetic analyses based on 16S rRNA gene sequence uncovered that the strain TK19036T pertained to the family Catalinimonadaceae under phylum Bacteroidota, and formed a distinct lineage with the closed species Tunicatimonas pelagia NBRC 107804T. The up-to-bacteria-core gene phylogenetic trees also demonstrated a deep and novel branch formed by the strain TK19036T within the family Catalinimonadaceae. Based on chemotaxonomic, phylogenetic and genomic features presented above, strain TK19036T represents a novel species from a novel genus of the family Catalinimonadaceae, for which the name Roseihalotalea indica gen. nov. sp. nov. is proposed. The type strain is TK19036T (= CGMCC 1.18940T = NBRC 116371T).
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This study was supported by the National Natural Science Foundation of China (42276120, 42141003), and the International Science Partnership Program of the Chinese Academy of Sciences (121311KYSB20190029).
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B.C., M.Z. and J.Y. designed and performed the experiments. B.C. and M.Z. analyzed the data. M.Z., B.C., D.L. and K.T. wrote the manuscript. B.C., D.L. and M.Z. revised the manuscript. All authors read and approved the final manuscript.
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Chen, B., Zhang, M., Lin, D. et al. Roseihalotalea indica gen. nov., sp. nov., a halophilic Bacteroidetes from mesopelagic Southwest Indian Ocean with higher carbohydrate metabolic potential. Antonie van Leeuwenhoek 117, 66 (2024). https://doi.org/10.1007/s10482-024-01965-x
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DOI: https://doi.org/10.1007/s10482-024-01965-x