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 Microbacterium , strains TW48 T and UW52 T were affiliated to the genus Paenibacillus, strain PT-3 T was related to the genus Flavobacterium , and strain RJY3 T was associated with the genus Aquabacterium . The closest phylogenetic taxa to W4 T , FW7 T , TW48 T , UW52 T , PT-3 T , and RJY3 T were Microbacterium bovistercoris NEAU-LLE T (97.7 %), Microbacterium protaetiae DFW100M-13 T (97.9 %), Paenibacillus auburnensis JJ-7 T (99.6 %), Paenibacillus allorhizosphaerae JJ-447 T (95.7 %), Flavobacterium buctense T7 T (97.1 %), and Aquabacterium terrae 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 ω 7 c and/or C 16 : 1 ω 6 c ), C 16 : 0 , summed feature 8 (C 18 : 1 ω 7 c and/or C 18 : 1 ω 6 c ), 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 Microbacterium , Paenibacillus , Flavobacterium , and Aquabacterium . Accordingly, we propose the names Microbacterium humicola sp. nov., with the type strain W4 T (=KCTC 49888 T =NBRC 116001 T ), Microbacterium terrisoli sp. nov., with the type strain FW7 T (=KCTC 49859 T =NBRC 116000 T ), Paenibacillus pedocola sp. nov., with the type strain TW48 T (=KCTC 43470 T =NBRC 116017 T ), Paenibacillus silviterrae sp. nov., with the type strain UW52 T (=KCTC 43477 T =NBRC 116018 T ), Flavobacterium terrisoli sp. nov., with the type strain PT-3 T (=KCTC 92106 T =NBRC 116012 T ), and Aquabacterium humicola sp. nov., with the type strain RJY3 T (=KCTC 92105 T =NBRC 115831 T ).