Pseudomonas atagosis sp. nov., and Pseudomonas akappagea sp. nov., New Soil Bacteria Isolated from Samples on the Volcanic Island Izu Oshima, Tokyo

Curr Microbiol. 2020 Aug;77(8):1909-1915. doi: 10.1007/s00284-020-01943-2. Epub 2020 Mar 18.


During the exploration of microbial natural resources, two strains of Pseudomonas, PS14T and PS24T, were isolated from samples taken from Izu Oshima, a volcanic island located 120 km southwest of central Tokyo. Phylogenetic analysis based on 16S rRNA gene sequences showed that PS14T was most similar to Pseudomonas baetica a390T (99.6%) and Pseudomonas helmanticensis OHA11T (99.5%), and that PS24T was most similar to Pseudomonas qingdaonensis JJ3T (98.8%) and Pseudomonas lutea OK2T (98.7%). The major fatty acids of these two strains were C16:0 and C17:0 cyclo, summed feature 3 (C16:1 ω6c and/or C16:1 ω7c), and summed feature 8 (C18:1 ω7c and/or 18:1 ω6c). The phylogenetic analyses, DNA-DNA hybridization results and phenotypic traits indicated that PS14T and PS24T constitute two novel species, Pseudomonas atagosis sp. nov. (type strain PS14T = CECT 9940T, = LMG 31496T) and Pseudomonas akappagea sp. nov. (type strain PS24T = CECT 9941T, = LMG 31497T), respectively. The sequence data of the draft genomes of PS14T and PS24T were deposited in the GenBank database under accession numbers VXCA00000000 and VXCP00000000, respectively, and the sequence data of their 16S rRNA genes were deposited in the GenBank database under accession numbers MN396717 and MN382268, respectively.

MeSH terms

  • Bacterial Typing Techniques
  • Base Composition
  • DNA, Bacterial / genetics
  • Fatty Acids / chemistry
  • Genome, Bacterial
  • Islands
  • Nucleic Acid Hybridization
  • Phylogeny*
  • Pseudomonas / classification*
  • Pseudomonas / isolation & purification
  • RNA, Ribosomal, 16S / genetics
  • Sequence Analysis, DNA
  • Soil Microbiology*
  • Tokyo
  • Volcanic Eruptions


  • DNA, Bacterial
  • Fatty Acids
  • RNA, Ribosomal, 16S