Catenulispora graminis sp. nov., a rhizobacterium from bamboo (Phyllostachys nigro var. henonis) rhizosphere soil

A novel actinobacterium, designated strain BR-34(T), was isolated from rhizosphere soil of bamboo (Phyllostachys nigro var. henonis) sampled in Damyang, Korea. The strain was found to have morphological and chemotaxonomic characteristics typical of the genus Catenulispora. The strain contained iso-C(16 : 0) as the major fatty acid and MK-9(H(4)), MK-9(H(6)) and MK-9(H(8)) as major isoprenoid quinones. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain BR-34(T) formed a cluster separate from members of the genus Catenulispora and was related most closely to Catenulispora acidiphila ID139908(T) (97.4% similarity), Catenulispora rubra Aac-30(T) (97.3%), Catenulispora yoronensis TT N02-20(T) (97.3%) and Catenulispora subtropica TT 99-48(T) (97%). However, the level of DNA-DNA relatedness between strain BR-34(T) and C. acidiphila ID139908(T) was only 45.32%. Based on DNA-DNA relatedness, morphological and phenotypic data, strain BR-34(T) could be distinguished from the type strains of phylogenetically related species. It is therefore considered to represent a novel species of the genus Catenulispora, for which the name Catenulispora graminis sp. nov. is proposed. The type strain is BR-34(T) (=KACC 15070(T)=NBRC 107755(T)).