Two Novel Species of Paenibacillus praedii sp. nov. and Ectobacillus soil sp. nov.

Two novel aerobic, rod-shaped, motile bacterial strains, designated as strains sgz302251 T and sgz5001026 T , were both isolated from paddy soils. 16S rRNA gene sequences analysis revealed that strain sgz302251 T exhibited 98.3% similarity with its closest reference strain Paenibacillus vietnamensis N4 T , while strain sgz5001026 T had the highest similarity of 97.5% to Ectobacillus polymachus KACC 18242 T . The average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values between strains sgz302251 T , sgz5001026 T and their closest reference strains were 86.0% and 21.2%, 84.9% and 22.9%, respectively. The genomic DNA G + C contents of sgz302251 T and sgz5001026 T were 63.4% and 68.8%, respectively. Strain sgz302251 T grew at 20–37 °C (optimum 30 °C), pH 5.0–9.0 (optimum 6.5–7.5) and tolerated 0–1.0% NaCl (optimum 0.5%, w/v), while strain sgz5001026 T grew at 4–45 °C (optimum 37 °C), pH 5.0–9.0 (optimum 6.0) and 0–0.5% NaCl (optimum 0%). The quinone in both strains was MK-7 and major polar lipids were diphosphatidylglycerol (DPG), phosphatidylethanolamine (PE) and phosphatidylglycerol (PG). The main fatty acids (> 5%) of strain sgz302251 T were anteiso-C 15:0 , anteiso-C 17:0 , and C 16:0 , whereas strain sgz5001026 T included anteiso-C 15:0 , iso-C 15:0 , iso-C 16:0 and iso-C 14:0 . Based on the above evidence, the proposed names of the two novel species are Paenibacillus praedii sp. nov. (type strain sgz302251 T  = MCCC 1K09633 T  = KCTC 43808 T ), Ectobacillus soli sp. nov. (type strain sgz5001026 T  = MCCC 1K09373 T  = KCTC 25903 T ), respectively.