<i>Pedobacter daejeonensis</i> sp. nov. and <i>Pedobacter trunci</i> sp. nov., isolated from an ancient tree trunk, and emended description of the genus <i>Pedobacter</i>

다국어 초록 (Multilingual Abstract)

<P>Two Gram-stain-negative, yellow, aerobic and rod-shaped bacterial isolates, designated THG-DN3.18<SUP>T</SUP> and THG-DN3.19<SUP>T</SUP>, were isolated from an ancient tree trunk from Daejeon, South Korea. 16S rRNA gene sequence similarity showed that both strains belong to the genus <I>Pedobacter</I> within the family <I>Sphingobacteriaceae</I> . Strain THG-DN3.18<SUP>T</SUP> exhibited maximum sequence similarity with <I>Pedobacter boryungensis</I> KCTC 23344<SUP>T</SUP> (98.5 %) while strain THG-DN3.19<SUP>T</SUP> exhibited maximum sequence similarity with <I>Pedobacter nyackensis</I> LMG 24260<SUP>T</SUP> (97.3 %). In DNA–DNA hybridization tests, the two strains showed less than 35 % relatedness with respect to closely related species of the genus <I>Pedobacter</I> . Both strains contained iso-C<SUB>15 : 0</SUB> and C<SUB>16 : 1</SUB>ω6<I>c</I> and/or C<SUB>16 : 1</SUB>ω7<I>c</I> (summed feature 3) as the predominant fatty acids and MK-7 as the major isoprenoid quinone. The DNA G+C contents of strains THG-DN3.18<SUP>T</SUP> and THG-DN3.19<SUP>T</SUP> were 35.5 and 40.1 mol%, respectively. The genotypic analysis, biochemical properties, and phenotypic and chemotaxonomic characteristics indicate that strains THG-DN3.18<SUP>T</SUP> and THG-DN3.19<SUP>T</SUP> represent novel species of the genus <I>Pedobacter</I> , for which the names <I>Pedobacter daejeonensis</I> sp. nov. and <I>Pedobacter trunci</I> sp. nov. are proposed. The type strains are THG-DN3.18<SUP>T</SUP> ( = KCTC 42230<SUP>T</SUP> = JCM 30352<SUP>T</SUP>) and THG-DN3.19<SUP>T</SUP> ( = KCTC 42233<SUP>T</SUP> = JCM 30353<SUP>T</SUP>), respectively.</P>