Microbacterium awajiense sp. nov., Microbacterium fluvii sp. nov. and Microbacterium pygmaeum sp. nov.

抄録

The taxonomic positions of three novel strains isolated from soil, driftwood and sediment samples collected in Japan were investigated based on the results of chemotaxonomic, phenotypic and genotypic characteristics. The strains that we examined were Gram-positive, catalase-positive bacteria with L-ornithine as a diagnostic diamino acid of peptidoglycan. The acyl type of peptidoglycan was N-glycolyl. The major menaquinones were MK-11, -12, -13 and/or -14. Mycolic acids were not detected. The G+C content of the DNA was 68 to 70 mol%. These morphological and chemotaxonomical characters and comparative 16S rDNA analysis of the three isolated strains revealed that they belong to the genus Microbacterium. DNA-DNA relatedness data revealed that the three isolates are three new species of the genus Microbacterium. On the basis of the polyphasic evidence, the isolates should be classified as novel species of the genus Microbacterium: Microbacterium awajiense sp. nov., Microbacterium fluvii sp. nov. and Microbacterium pygmaeum sp. nov. with the type strains YM13-414^T (=MBIC08276^T, DSM 18907^T), YSL3-15^T (=MBIC08277^T, DSM 18908^T) and KV-490^T (=NRRL B-24469^T, NBRC 101800^T), respectively.