Abstract
Two strains of bacteria designated strains S-53T and A27T were isolated from forest soil and subjected to polyphasic characterization. Cells were aerobic, Gram-staining-negative, catalase- and oxidase- positive, non-motile, non-spore-forming, rod-shaped, and yellow-pigmented. Flexirubin-type pigments were present. Both strains were positive for PNPG, hydrolysed casein, and tyrosine. A phylogenetic analysis based on its 16S rRNA gene sequence revealed that strains S-53T and A27T formed a lineage within the family Cytophagaceae that were distinct from various members of the genus Dyadobacter (98.9–93.2% sequence similarity). Closest member for strain S-53T was Dyadobacter jejuensis AM1R11T (95.7%) and for A27T Dyadobacter endophyticus 65T (98.9%). The predominant respiratory quinone was MK-7 for both strains. The major polar lipid for both strains was phosphatidylethanolamine. The major cellular fatty acids for both strains were summed feature 3 (C16:1ω7c and/or C16:1ω6c), iso-C15:0, C16:1ω5c, and C16:0. The DNA G+C content of strains ranges from 46.5 to 48.7 mol%. On the basis of phenotypic, genotypic, chemotaxonomic, and phylogenetic analysis, both strains S-53T and A27T represent a novel member in the genus Dyadobacter, for which the name Dyadobacter flavus sp. nov. and Dyadobacter terricola sp. nov. are proposed, respectively. The type strain of D. flavus is S-53T (= KEMB 9005-541T = KACC 19149T = NBRC 112681T) and type strain of D. terricola is A27T (= KEMB 9005-524T = KACC 19147T = NBRC 112680T).
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This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2016R1D1A1A09916982).
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Communicated by Erko Stackebrandt.
The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains S-53T and A27T are KY117465 and KY117482, respectively. The Digital Protologue database Taxon Number for strains S-53T and A27T is TA00416 and TA00417, respectively.
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Dahal, R.H., Kim, J. Dyadobacter flavus sp. nov. and Dyadobacter terricola sp. nov., two novel members of the family Cytophagaceae isolated from forest soil. Arch Microbiol 200, 1067–1074 (2018). https://doi.org/10.1007/s00203-018-1521-3
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DOI: https://doi.org/10.1007/s00203-018-1521-3