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Pontibacter pudoricolor sp. nov., and Pontibacter russatus sp. nov. radiation-resistant bacteria isolated from soil

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Abstract

Gram-stain-negative, aerobic, non-flagellated, red-colored strains BT214T and BT326T were isolated from soil collected in Uijeongbu city, Korea. Phylogenetic analyses based on 16S rRNA gene sequences revealed that strains BT214T and BT326T formed a distinct lineage within the family Hymenobacteraceae (order Chitinophagales, class Chitinophagia) and were most closely related to members of the genus Pontibacter, Pontibacter populi HLY7-15T (96.9% 16S rRNA gene sequence similarity) and Pontibacter amylolyticus 9-2T (96.1%), respectively. Optimal growth of two strains occurred at 25 °C, pH 7.0 and in the absence of NaCl. The predominant cellular fatty acids were summed feature 4 (iso-C17:1 I/anteiso-C17:1 B) and iso-C15:0. The major respiratory quinone of two strains was MK-7. The major polar lipid of two strains was phosphatidylethanolamine. Biochemical, chemotaxonomic and phylogenetic analyses indicated that strains BT214T and BT326T represent novel bacterial species within the genus Pontibacter, for which the names Pontibacter pudoricolor and Pontibacter russatus are proposed. The type strains of Pontibacter pudoricolor and Pontibacter russatus are BT214T and BT326T, respectively.

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Acknowledgements

This research was supported by the MISP (Ministry of Science, ICT and Future Planning), Korea, under the National Program for Excellence in SW supervised by the IITP (Institute of Information and communications Technology Planning and Evaluation)” (2016-0-00022) and by a grant from the National Institute of Biological Resources (NIBR), funded by the Ministry of Environment (MOE) of the Republic of Korea (NIBR201902111). We are grateful to Dr. Aharon Oren (The Hebrew University of Jerusalem, Israel) for helping with the etymology.

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Maeng, S., Park, Y., Lee, S.E. et al. Pontibacter pudoricolor sp. nov., and Pontibacter russatus sp. nov. radiation-resistant bacteria isolated from soil. Antonie van Leeuwenhoek 113, 1361–1369 (2020). https://doi.org/10.1007/s10482-020-01446-x

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