Clostridium jejuense sp. nov., isolated from soil

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  • Hyunyoung Jeong
    School of Biological Sciences, Seoul National University, 56-1 Shillim-dong, Kwanak-gu, Seoul 151-742, Korea
  • Hana Yi
    School of Biological Sciences, Seoul National University, 56-1 Shillim-dong, Kwanak-gu, Seoul 151-742, Korea
  • Yuji Sekiguchi
    Institute for Biological Resources and Functions, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
  • Mizuho Muramatsu
    Institute for Biological Resources and Functions, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
  • Yoichi Kamagata
    Institute for Biological Resources and Functions, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
  • Jongsik Chun
    School of Biological Sciences, Seoul National University, 56-1 Shillim-dong, Kwanak-gu, Seoul 151-742, Korea

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説明

<jats:p>A strictly anaerobic, mesophilic, endospore-forming bacterium, designated strain HY-35-12<jats:sup>T</jats:sup>, was isolated from a soil sample in Jeju, Korea. Cells of this isolate were Gram-positive, motile rods that formed oval to spherical terminal spores. Strain HY-35-12<jats:sup>T</jats:sup> grew optimally at 30 °C, pH 7·0 and 0–0·5 % (w/v) NaCl. The isolate produced pyruvate, lactate, acetate, formate and hydrogen as fermentation end products from glucose. The G+C content of DNA of the isolate was 41 mol%. Phylogenetic analysis based on 16S rRNA gene sequences revealed that the organism formed a monophyletic clade with <jats:italic>Clostridium xylanovorans</jats:italic> and <jats:italic>Clostridium aminovalericum</jats:italic> in cluster XIVa of the genus <jats:italic>Clostridium</jats:italic>. The closest phylogenetic neighbour was <jats:italic>C. xylanovorans</jats:italic>, with 96·65 % 16S rRNA gene sequence similarity. Several physiological and chemotaxonomic properties were identified that enable strain HY-35-12<jats:sup>T</jats:sup> to be distinguished from phylogenetically related clostridia. On the basis of polyphasic characteristics, it is proposed that strain HY-35-12<jats:sup>T</jats:sup> (=IMSNU 40003<jats:sup>T</jats:sup>=KCTC 5026<jats:sup>T</jats:sup>=DSM 15929<jats:sup>T</jats:sup>) represents a novel species, <jats:italic>Clostridium jejuense</jats:italic> sp. nov.</jats:p>

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