Lysobacter fragariae sp. nov. and Lysobacter rhizosphaerae sp. nov. isolated from rhizosphere of strawberry plant

Antonie Van Leeuwenhoek. 2015 Jun;107(6):1437-44. doi: 10.1007/s10482-015-0439-x. Epub 2015 Apr 1.


Two bacterial strains, designated THG-DN8.7(T) and THG-DN8.3(T), were isolated from the rhizosphere of a strawberry plant in Gyeryong Mountain, South Korea. Cells of both isolates were observed to be Gram-negative, yellow-coloured and rod-shaped. Comparative 16S rRNA gene sequence analysis showed that strain THG-DN8.7(T) had highest sequence similarities to Lysobacter yangpyeongensis KACC 11407(T) (97.2 %), Lysobacter niabensis KACC 11587(T) (97.0 %) and Lysobacter oryzae KCTC 22249(T) (96.9 %), while strain THG-DN8.3(T) had closely similarity with L. niabensis KACC 11587(T) (98.1 %), L. oryzae KCTC 22249(T) (97.1 %) and L. yangpyeongensis KACC 11407(T) (96.1 %). DNA-DNA relatedness values between strains THG-DN8.7(T) and THG-DN8.3(T) and their closest phylogenetically neighbours were below 30.0 %, which indicates that strains THG-DN8.7(T) and THG-DN8.3(T) represent distinct species within the genus Lysobacter. Both strains were found to contain iso-C15:0, iso-C16:0 and iso-C17:1 ω9c as predominant fatty acids and ubiquinone-8 as major isoprenoid quinone. The major polar lipids were identified as phosphatidylethanolamine, phosphatidyl-N-methylethanolamine, phosphatidylglycerol and diphosphatidylglycerol. The DNA G+C content of strains THG-DN8.7(T) and THG-DN8.3(T) were determined to be 66.9 and 67.8 mol%, respectively. These data are consistent with the affiliation of the two new species represented by THG-DN8.7(T) and THG-DN8.3(T) to the genus Lysobacter. The names Lysobacter fragariae sp. nov. and Lysobacter rhizosphaerae sp. nov. are proposed for these species with the type strains THG-DN8.7(T) (=KCTC 42236(T) = JCM 30322(T)) and THG-DN8.3(T) (=KCTC 42237(T) = JCM 30321(T)), respectively.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bacterial Typing Techniques
  • Base Composition
  • Cluster Analysis
  • Cytosol / chemistry
  • DNA, Bacterial / chemistry
  • DNA, Bacterial / genetics
  • DNA, Ribosomal / chemistry
  • DNA, Ribosomal / genetics
  • Fatty Acids / analysis
  • Fragaria / microbiology*
  • Lysobacter / classification*
  • Lysobacter / genetics
  • Lysobacter / isolation & purification*
  • Lysobacter / physiology
  • Molecular Sequence Data
  • Nucleic Acid Hybridization
  • Phospholipids / analysis
  • Phylogeny
  • Pigments, Biological / metabolism
  • Plant Roots / microbiology
  • Quinones / analysis
  • RNA, Ribosomal, 16S / genetics
  • Republic of Korea
  • Rhizosphere
  • Sequence Analysis, DNA
  • Soil Microbiology*


  • DNA, Bacterial
  • DNA, Ribosomal
  • Fatty Acids
  • Phospholipids
  • Pigments, Biological
  • Quinones
  • RNA, Ribosomal, 16S

Associated data

  • GENBANK/KM035978
  • GENBANK/KM035979