Microbacterium humicola sp. nov., Microbacterium terrisoli sp. nov., Paenibacillus pedocola sp. nov., Paenibacillus silviterrae sp. nov., Flavobacterium terrisoli sp. nov., and Aquabacterium humicola sp. nov., isolated from soil

Four Gram-stain-positive and two Gram-stain-negative bacterial strains, designated as W4^T, FW7^T, TW48^T, UW52^T, PT-3^T, and RJY3^T, were isolated from soil samples collected from the Republic of Korea. The 16S rRNA gene sequence analysis showed that strains W4^T and FW7^T belonged to the genus <i>Microbacterium</i>, strains TW48^T and UW52^T were affiliated to the genus <i>Paenibacillus,</i> strain PT-3^T was related to the genus <i>Flavobacterium</i>, and strain RJY3^T was associated with the genus <i>Aquabacterium</i>. The closest phylogenetic taxa to W4^T, FW7^T, TW48^T, UW52^T, PT-3^T, and RJY3^T were <i>Microbacterium bovistercoris</i> NEAU-LLE^T (97.7 %), <i>Microbacterium protaetiae</i> DFW100M-13^T (97.9 %), <i>Paenibacillus auburnensis</i> JJ-7^T (99.6 %), <i>Paenibacillus allorhizosphaerae</i> JJ-447^T (95.7 %), <i>Flavobacterium buctense</i> T7^T (97.1 %), and <i>Aquabacterium terrae</i> S2^T (99.5 %), respectively. Average nucleotide identity and digital DNA-DNA hybridization values between the novel strains and related reference type strains were <95.0 % and <70.0 %, respectively. The major cellular fatty acid in strains W4^T, FW7^T TW48^T, and UW52^T was antiso-C_{15 : 0}. Similarly, strain PT-3^T revealed iso-C_{15 : 0}, iso-C_{15 : 1} G, iso-C_{17 : 0} 3-OH, and iso-C_{15 : 0} 3-OH as its principal fatty acids. On the other hand, RJY3^T exhibited summed feature 3 (C_{16 : 1} <i> ω</i>7<i>c</i> and/or C_{16 : 1} <i> ω</i>6<i>c</i>), C_{16 : 0}, summed feature 8 (C_{18 : 1} <i> ω</i>7<i>c</i> and/or C_{18 : 1} <i> ω</i>6<i>c</i>), and C_{12 : 0} as its predominant fatty acids. Overall, the polyphasic taxonomic data indicated that strains W4^T, FW7^T, TW48^T, UW52^T, PT-3^T, and RJY3^T represent novel species within the genera <i>Microbacterium</i>, <i>Paenibacillus</i>, <i>Flavobacterium</i>, and <i>Aquabacterium</i>. Accordingly, we propose the names <i>Microbacterium humicola</i> sp. nov., with the type strain W4^T (=KCTC 49888^T=NBRC 116001^T), <i>Microbacterium terrisoli</i> sp. nov., with the type strain FW7^T (=KCTC 49859^T=NBRC 116000^T), <i>Paenibacillus pedocola</i> sp. nov., with the type strain TW48^T (=KCTC 43470^T=NBRC 116017^T), <i>Paenibacillus silviterrae</i> sp. nov., with the type strain UW52^T (=KCTC 43477^T=NBRC 116018^T), <i>Flavobacterium terrisoli</i> sp. nov., with the type strain PT-3^T (=KCTC 92106^T=NBRC 116012^T), and <i>Aquabacterium humicola</i> sp. nov., with the type strain RJY3^T (=KCTC 92105^T=NBRC 115831^T).