Mucilaginibacter straminoryzae sp. nov., isolated from rice straw used for growing periphyton.

A rod-shaped, non-motile, Gram-negative bacterium, strain RS28, was isolated from rice straw used as material for periphyton growth. Phylogenetic analysis of the 16S rRNA gene sequence revealed that strain RS28 was affiliated with the genus and had the highest sequence similarity to HMF7856 (96.47 %) and DSM 26907 (96.12 %). Strain RS28 was found to grow at pH 5.5-8.0, 17-40 °C and in the presence of 0-1.5 % (w/v) NaCl. Strain RS28 contained summed feature 3 (comprising C 7 and/or C 6), iso-C and iso-C 3-OH as the major fatty acids (> 10.0 %). The major polar lipids were phosphatidylethanolamine, two unidentified phospholipids, two unidentified aminophospholipids, three unidentified aminolipids and one unidentified lipid. The respiratory quinone was menaquinone 7. The genomic DNA G+C content was 44.7 mol%. Strain RS28 possessed six putative secondary metabolite gene clusters involved in the synthesis of resorcinol, NRPS-like, terpene, lassopeptide, T3PKS and arylpolyene. On the basis of the phenotypic, chemotaxonomic, and phylogenetic characteristics, strain RS28 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is RS28 (=KCTC 92039=LMG 32424).