title: Selenomonas bovis sp. nov., isolated from yak rumen contents.
abstract: Two strictly anaerobic, crescent-shaped bacterial strains, designated WGT and Ycb08, were isolated from a cellulose-degrading mixed culture enriched from yak rumen contents. The strains were Gram-negative, non-spore-forming and motile, with four to six flagella situated at the centre of the concave side of the cell. The cells were 0.9-1.1x4-6 microm. Growth was observed at 27-46 degrees C (optimum 39 degrees C) and pH 4.2-8.3 (optimum pH 7.0-7.2). Arabinose, glucose, mannose, cellobiose, lactose, sucrose, trehalose, melibiose, raffinose, salicin and aesculin were fermented. The end products of glucose fermentation were acetate, propionate and CO2. The G+C contents of strains WGT and Ycb08 were respectively 63.9+/-0.2 and 62.5+/-0.2 mol% (Tm). Phylogenetic analysis based on 16S rRNA gene sequences revealed that the two strains were related to the genera Mitsuokella and Selenomonas at similarity levels below 97%; however, they differed from members of the genus Mitsuokella in their flagellar arrangement. On the basis of phenotypic, genotypic and physiological evidence, strains WGT and Ycb08 are identified as members of a novel species of the genus Selenomonas, for which the name Selenomonas bovis sp. nov. is proposed. The type strain is WGT (=CGMCC 1.5073T=JCM 15470T).
authors: State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China.
authors: Kegui
authors: K
authors: Zhang
authors: Xiuzhu
authors: X
authors: Dong
mesh_terms: D000085:Acetates / Q000378:metabolism; D000693:Anaerobiosis; D000818:Animals; D015373:Bacterial Typing Techniques; D001482:Base Composition; D050260:Carbohydrate Metabolism; D002245:Carbon Dioxide / Q000378:metabolism; D002417:Cattle / Q000382:microbiology*; D016000:Cluster Analysis; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D005407:Flagella; D006863:Hydrogen-Ion Concentration; D008124:Locomotion; D008969:Molecular Sequence Data; D010802:Phylogeny; D011422:Propionates / Q000378:metabolism; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012417:Rumen / Q000382:microbiology*; D020357:Selenomonas / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification* / Q000502:physiology; D017422:Sequence Analysis, DNA; D013171:Spores, Bacterial / Q000166:cytology; D013696:Temperature
chemical_list: D000085:Acetates; D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D011422:Propionates; D012336:RNA, Ribosomal, 16S; D002245:Carbon Dioxide