Aeromicrobium chenweiae sp. nov. and Aeromicrobium yanjiei sp. nov., isolated from Tibetan antelope (Pantholops hodgsonii ) and plateau pika (Ochotona curzoniae ), respectively

International Journal of Systematic and Evolutionary Microbiology
Junqin LiJianguo Xu

Abstract

Four novel strains (592T, S592, MF47T and SMF47) were isolated from Tibetan antelopes (Pantholops hodgsonii) and plateau pikas (Ochotona curzoniae), respectively. The cells were aerobic, non-motile, Gram-stain- and catalase-positive, rod-shaped bacteria. The 16S rRNA gene sequences of the four strains showed highest similarities to Aeromicrobium fastidiosum DSM 10552T (98.1, 98.6, 98.7 and 98.7 %, respectively), and the phylogenetic analyses based on 16S rRNA gene and genomic sequences indicated that strains 592T and MF47T represent two novel species. The four isolates produced acid from l-rhamnose, d-xylose and cellobiose, but were unable to reduce nitrate. The DNA G+C contents of strains 592T and MF47T were 70.3 and 69.8 mol%, respectively. The digital DNA-DNA hybridization value between strains 592T and MF47T was 32.6 %, lower than the threshold of 70 %, indicating they belong to different species. The four strains' genomes displayed less than 24.6 % DNA-DNA relatedness with all available genomes of the genus Aeromicrobium in the NCBI database, including Aeromicrobium fastidiosum NBRC 14897T and Aeromicrobium ginsengisoli JCM 14732T. The major fatty acids of the four strains were C18 : 1 ω9c and C18 : 0 10-methyl, and the ma...Continue Reading

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