A novel Gram-stain negative, asporogenous, slimy, rod-shaped, non-motile bacterium ROOL2^T was isolated from the root samples collected from a rice field located in Ilsan, South Korea. Phylogenetic analysis of the 16S rRNA sequence showed 96.5% similarity to Tianweitania sediminis Z8^T followed by species of genera Mesorhizobium (96.4–95.6%), Aquabacterium (95.9–95.7%), Rhizobium (95.8%) and Ochrobactrum (95.6%). Strain ROOL2^T grew optimally at 30 °C in the presence of 1–6% (w/v) NaCl and at pH 7.5. The major respiratory quinone was ubiquinone-10 and the major cellular fatty acids were C_18:1ω7c, summed feature 4 (comprising iso-C_17:1 I and/or anteiso-C_17:1 B) and summed feature 8 (comprising C_18:1ω6c and/or C_18:1ω7c). The polar lipid profile consisted of diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine, phosphatidylmethylethanolamine, phosphatidylglycerol, one unidentified aminolipid and two unidentified lipids. The assembled draft genome of strain ROOL2^T had 28 contigs with N50 value of 656,326 nt, total length of 4,894,583 bp and a DNA G + C content of 61.5%. The average amino acid identity (AAI) values of strain ROOL2^T against the genomes of related members belonging to the same family were below 68% and the ANI and dDDH values between the strain ROOL2^T and the type strains of phylogenetically related species were 61.8–76.3% and 19.4–21.1%, respectively. Strain ROOL2^T only produces carotenoid-type pigment when grown on LB agar and slime on R2A agar. In the presence of tryptophan, strain ROOL2^T produced indole acetic acid (IAA), a phytohormone in plant growth and development. Gene clusters for indole-3-glycerol phosphatase and tryptophan synthase were found in the genome of strain ROOL2^T. The genotypic and phenotypic characteristics indicated that strain ROOL2^T represents a novel genus belonging the family Phyllobacteriaceae, for which the name Oryzicola mucosus gen. nov., sp. nov. is proposed. The type strain is ROOL2^T (KCTC 82711 ^T = NBRC 114717 ^T).

从位于韩国一山的稻田收集的根样本中分离出一种新型革兰氏染色阴性、无孢子、粘稠、杆状、非运动性细菌 ROOL2 ^T。16S rRNA 序列的系统发育分析显示与天维塔尼亚Z8 ^T有 96.5% 的相似性，其次是中根瘤菌属(96.4–95.6%)、水细菌(95.9–95.7%)、根瘤菌(95.8%) 和Ochrobactrum ( 95.8 %)。菌株 ROOL2 ^T在 30 °C、1–6% (w/v) NaCl 和 pH 7.5 条件下最佳生长。主要呼吸醌是ubiquinone-10，主要细胞脂肪酸是C _18:1ω7c，总特征4（包含iso-C _17:1 I和/或反异-C _17:1 B）和总特征8（包含C _18:1 ω6c和/或C _18:1 ω7c）。极性脂质谱由二磷脂酰甘油、磷脂酰乙醇胺、磷脂酰胆碱、磷脂酰甲基乙醇胺、磷脂酰甘油、一种未鉴定的氨基脂质和两种未鉴定的脂质组成。ROOL2 ^T菌株组装的基因组草图有 28 个重叠群，N50 值为 656,326 nt，总长度为 4,894,583 bp，DNA G + C 含量为 61.5%。菌株 ROOL2 ^T的平均氨基酸同一性 (AAI) 值ROOL2 ^T菌株与系统发育相关物种的类型菌株之间的 ANI 和 dDDH 值分别为 61.8-76.3% 和 19.4-21.1%。菌株 ROOL2 ^T在 LB 琼脂上生长时仅产生类胡萝卜素型色素，在 R2A 琼脂上培养粘液。在色氨酸存在下，菌株 ROOL2 ^T产生吲哚乙酸 (IAA)，这是植物生长和发育中的一种植物激素。在菌株 ROOL2 ^T的基因组中发现了吲哚-3-甘油磷酸酶和色氨酸合酶的基因簇。基因型和表型特征表明菌株 ROOL2 ^T代表了属于该家族的一个新属Phyllobacteriaceae，对于这名空心稗mucosus 根。十一月，sp。十一月 被提议。类型菌株是 ROOL2 ^T (KCTC 82711  ^T  = NBRC 114717  ^T )。