An ovoid to rod shaped, white to brown pigmented, facultative anaerobic, mesophilic, non-phototrophic, Gram-staining-negative, non-motile, multiply by binary fission designated strain KVB23^T, which was isolated from root of rice plant, near Ilsan, South Korea, was investigated for its taxonomic position by polyphasic approach. Optimal growth was found to occur at 30˚C, at pH 6.5 and in the absence of NaCl on R2A. Phylogenetic analysis based on the 16S rRNA gene sequence of strain KVB23^T revealed that it formed a distinct lineage, as a separate deep branch within the family Rhodobacteriaceae, with < 96.5% sequence similarity to representatives of the genera Rhodobacter, Xinfangfangia, Tabrizicola, Falsirhodobacter, Haematobacter, Paenirhodobacter, Pseudorhodobacter and Pararhodobacter. Based in 16S rRNA sequences strain KVB23^T was most closely related to Tabrizicola fusiformis KCTC 62105 ^T (96.5%) and Rhodobacter thermarum KCTC 52712 ^T (96.2%). The draft genome of strain KVB23^T was 3.80 bp long with a DNA G + C content of 63.1%. Genome of strain KVB23^T harboured gene clusters for tryptophan and cobalamin biosynthesis. The strain contained Q-10 as the sole respiratory quinone. The predominant fatty acids were found to consist of C_16:0, C_18:0 and summed feature 8 (comprising C_18:1 ω7c and / or C_18:1 ω6). The polar lipids were identified as diphosphatidylglycerol, phosphatidylethanolamine, seven unidentified phosphoglycolipids, two unidentified aminophosphoglycolipid, one unidentified glycolipid and four unidentified lipids. Phosphate-solubilizing bacteria have the ability to dissolve insoluble phosphates and enhance the soil fertility. Strain KVB23^T can solubilize calcium phosphate tribasic. Phosphate solubilizing and tryptophan biosynthesis property of strain KVB23^T could be a possible factor for the increase in growth of rice plant. Differential phenotypic, chemotaxonomic and genotypic properties, together with the phylogenetic distinctiveness, demonstrated that strain KVB23^T was found to represent a novel genus in the Rhodobacteriaceae family, for which the name Fuscibacter oryzae gen. nov., sp. nov. is proposed, with the type strain KVB23^T(= KACC 21711 ^T = NBRC 114716 ^T).

卵球形至棒状，白色至棕色色素，兼性厌氧，嗜温，非光养，革兰氏染色阴性，非运动性，通过二元裂变指定菌株 KVB23 ^T繁殖，该菌株是从一山附近的水稻根部分离出来的韩国，通过多相方法对其分类位置进行了调查。发现最佳生长发生在 30˚C、pH 6.5 和 R2A 上没有 NaCl 的情况下。基于应变KVB23的16S rRNA基因序列系统发育分析^Ť表明，它形成了鲜明的谱系，作为家庭内的单独的深支Rhodobacteriaceae，具有<96.5％序列相似性的属的代表红细菌，Xinfangfangia，Tabrizicola，Falsirhodobacter，Haematobacter，Paenirhodobacter，Pseudorhodobacter和Pararhodobacter。基于 16S rRNA 序列，菌株 KVB23 ^T与Tabrizicola fusiformis KCTC 62105  ^T (96.5%) 和Rhodobacter thermarum KCTC 52712  ^T (96.2%)最密切相关。菌株 KVB23 ^{T 的}基因组草图长 3.80 bp，DNA G + C 含量为 63.1%。KVB23 ^T菌株基因组含有色氨酸和钴胺素生物合成的基因簇。该菌株含有 Q-10 作为唯一的呼吸醌。发现主要脂肪酸由 C _16:0、C _18:0和总特征 8（包括 C _18:1 ω 7c 和/或 C _18:1 ω 6）组成。极性脂质被鉴定为二磷脂酰甘油、磷脂酰乙醇胺、7 种不明磷脂、2 种不明氨基磷酸糖脂、1 种不明糖脂和 4 种不明脂质。溶磷菌具有溶解不溶性磷酸盐和提高土壤肥力的能力。应变 KVB23 ^T能溶解磷酸三钙。菌株KVB23 ^T的磷酸盐增溶和色氨酸生物合成特性可能是促进水稻生长的一个可能因素。差异表型、化学分类学和基因型特性，以及系统发育的独特性，证明菌株 KVB23 ^T被发现代表红细菌科的一个新属，其名称为米镰刀菌属。十一月，sp。十一月 提出，类型应变 KVB23 ^T (= KACC 21711  ^T  = NBRC 114716  ^T )。