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      Cohnella thailandensis sp. nov., a xylanolytic bacterium from Thai soil.

      International Journal of Systematic and Evolutionary Microbiology
      Anaerobiosis, Bacillales, classification, genetics, isolation & purification, metabolism, Bacterial Typing Techniques, Base Composition, Cell Wall, chemistry, Cluster Analysis, DNA, Bacterial, DNA, Ribosomal, Diaminopimelic Acid, analysis, Fatty Acids, Molecular Sequence Data, Peptidoglycan, Phospholipids, Phylogeny, RNA, Ribosomal, 16S, Sequence Analysis, DNA, Soil Microbiology, Spores, Bacterial, cytology, Thailand, Vitamin K 2, Xylans

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          Abstract

          A xylanolytic bacterium, strain S1-3(T), was isolated from soil collected in Nan province, Thailand. It was characterized taxonomically based on phenotypic characteristics and 16S rRNA gene sequence comparison. The strain was a Gram-stain-positive, facultatively anaerobic, spore-forming, rod-shaped bacterium. It contained meso-diaminopimelic acid in the cell-wall peptidoglycan. The major menaquinone was MK-7. Iso-C₁₆:₀ (39.5 %) and anteiso-C₁₅:₀ (26.8 %) were predominant cellular fatty acids. Diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and lysyl-phosphatidylglycerol were the major polar lipids. The DNA G+C content was 53.3 mol%. Phylogenetic analysis using 16S rRNA gene sequences showed that strain S1-3(T) was affiliated to the genus Cohnella, and was closely related to Cohnella ginsengisoli GR21-5(T) and Cohnella thermotolerans CCUG 47242(T) with 95.7 and 95.3 % sequence similarity, respectively. Strain S1-3(T) could be clearly distinguished from related species of the genus Cohnella by its physiological and biochemical characteristics as well as by its phylogenetic position. Therefore, the strain represents a novel species of the genus Cohnella, for which the name Cohnella thailandensis sp. nov. is proposed. The type strain is S1-3(T) (=KCTC 22296(T) =TISTR 1890(T) =PCU 306(T)).

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