Mucilaginibacter ginsenosidivorans sp. nov., Isolated from Soil of Ginseng Field

Mucilaginibacter hurinus sp. nov., isolated from briquette warehouse soil

A novel bacterial strain, designated ZR32^T, was isolated from briquette warehouse soil in Ulsan (Korea). The strain was aerobic, showing pink-colored colonies on R2A agar. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain ZR32^T was closely related to Mucilaginibacter soli R9-65^T (97.0%), Mucilaginibacter gynuensis YC7003^T (96.9%), and Mucilaginibacter lutimaris BR-3^T (96.8%). The values of DNA-DNA relatedness related two highest strains M. soli R9-65^T and M. gynuensis YC7003^T were 31.2 ± 6.9% and 19.7 ± 0.3%, respectively. Its genome size was 3.9 Mb, comprising 3402 predicted genes. The DNA G+C content of strain ZR32^T was 43.0 mol%. The major cellular fatty acids (> 5% of total) were summed feature 3 (C_16:1ω6c and/or C_16:1ω7c), C_16:0, C_16:1ω5c, iso-C_15:0, iso-C_17:0 3-OH, and C_17:1ω9c. The major respiratory quinine was menaquinone-7 (MK-7). The major polar lipids were phosphatidylethanolamine, two unidentified phospholipids, one unidentified sphingolipid, and one unidentified polar lipid. Strain ZR32^T showed distinctive characteristics such as the temperature and pH for growth ranges, being positive for β-glucosidase, salicin production, negative for N-acetyl-glucosamine assimilation, being resistant to carbenicillin and piperacillin to related species. On the basis of phenotypic, chemotaxonomic, and phylogenetic data, strain ZR32^T represents a novel species of the genus Mucilaginibacter, for which the name Mucilaginibacter hurinus sp. nov. is proposed. The type strain is ZR32^T (= KCTC 62193 = CCTCC AB 2017285).