RT Journal Article SR Electronic(1) A1 Mu, Shan A1 Zhao, Qiannan A1 Zhao, Junwei A1 Cao, Tingting A1 Zhao, Xueli A1 Guo, Xiaowei A1 Li, Yuanyuan A1 Xiang, Wensheng A1 Wang, XiangjingYR 2018 T1 Sphaerisporangium rhizosphaerae sp. nov., an actinomycete isolated from the rhizosphere soil of a rubber tree (Hevea brasiliensis Muell. Arg) JF International Journal of Systematic and Evolutionary Microbiology, VO 68 IS 9 SP 2860 OP 2865 DO https://doi.org/10.1099/ijsem.0.002912 PB Microbiology Society, SN 1466-5034, AB A novel actinomycete, designated strain NEAU-mq3T, was isolated from the rhizosphere soil of a rubber tree (Hevea brasiliensis Muell. Arg) collected from Xianglu Mountain in Heilongjiang Province, north-east China, and characterized by using a polyphasic approach. Phylogenetic analysis based on the 16S rRNA gene sequence indicated that the organism should be assigned to the genus Sphaerisporangium and that it forms a monophyletic clade with its closest relatives ‘ Sphaerisporangium dianthi ’ NEAU-CY18T (99.2 % 16S rRNA gene sequence similarity) and Sphaerisporangium cinnabarinum JCM 3291T (98.8 %). Morphological and chemotaxonomic properties of strain NEAU-mq3T were also consistent with the description of the genus Sphaerisporangium . The whole-cell sugars were madurose, mannose, ribose and glucose. The menaquinones were MK-9(H2), MK-9(H4), MK-9(H0) and MK-9(H6). The diagnostic diamino acid of the peptidoglycan was meso-diaminopimelic acid. The phospholipid profile consisted of diphosphatidylglycerol, phosphatidylmethylethanolamine, phosphatidylethanolamine, phosphatidylinositol mannoside, an unidentified polar lipid and an unidentified phospholipid. The major fatty acids were identified as iso-C16 : 0, 10-methyl C17 : 0, C16 : 1ω7c and C17 : 1ω7c. DNA–DNA hybridization experiments and phenotypic tests were carried out between strain NEAU-mq3T and its most closely related strains, which further clarified their relatedness and demonstrated that NEAU-mq3T could be distinguished from these strains. Therefore, it is concluded that strain NEAU-mq3T represents a novel species of the genus Sphaerisporangium , for which the name Sphaerisporangium rhizosphaerae sp. nov. is proposed. The type strain is NEAU-mq3T (=CGMCC 4.7429T=JCM 32389T)., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijsem.0.002912