Original Paper

Antonie van Leeuwenhoek

, Volume 102, Issue 2, pp 307-317

First online:

Description of Fimbriimonas ginsengisoli gen. nov., sp. nov. within the Fimbriimonadia class nov., of the phylum Armatimonadetes

  • Wan-Taek ImAffiliated withDepartment of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST)
  • , Zi-Ye HuAffiliated withDepartment of Microbiology and Microbial Engineering, School of Life Sciences, Fudan University
  • , Kyoung-Ho KimAffiliated withDepartment of Microbiology, Pukyong National University
  • , Sung-Keun RheeAffiliated withDepartment of Microbiology, Chungbuk National University
  • , Han MengAffiliated withDepartment of Microbiology and Microbial Engineering, School of Life Sciences, Fudan University
  • , Sung-Taik LeeAffiliated withDepartment of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST)
  • , Zhe-Xue QuanAffiliated withDepartment of Microbiology and Microbial Engineering, School of Life Sciences, Fudan University Email author 

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Abstract

Strain Gsoil 348T was isolated from a ginseng field soil sample by selecting micro-colonies from one-fifth strength modified R2A agar medium after a long incubation period. 16S rRNA gene sequence analysis indicated that the strain is related to members of the phylum Armatimonadetes (formerly called candidate phylum OP10). Strain Gsoil 348T is mesophilic, strictly aerobic, non-motile and rod-shaped. It only grows in low nutrient media. The major respiratory quinones are menaquinones MK-11 and MK-10, and the main fatty acids are iso-C15:0, iso-C17:0, C16:0 and C16:1 ω11c. The G+C content is 61.4 mol%. The 16S rRNA gene sequences in public databases belonging to the phylum Armatimonadetes were clustered here into 6 groups. Five of these groups constituted a coherent cluster distinct from the sequences of other phyla in phylogenetic trees that were constructed using multiple-outgroup sequences from 49 different phyla. On the basis of polyphasic taxonomic analyses, it is proposed that strain Gsoil 348T (= KACC 14959T = JCM 17079T) should be placed in Fimbriimonas ginsengisoli gen. nov., sp. nov., as the cultured representative of the Fimbriimonadia class. nov., corresponding with Group 4 of the phylum Armatimonadetes.

Keywords

Armatimonadetes OP10 Phylogeny Novel class Fimbriimonadia