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Algoriphagus terrigena sp. nov., isolated from soil.

Jung-Hoon Yoon1, Mi-Hwa Lee1, So-Jung Kang1

  • 1Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon, Korea.

International Journal of Systematic and Evolutionary Microbiology
|April 6, 2006
PubMed
Summary

A novel bacterial species, Algoriphagus terrigena, was discovered in Korean soil. This Gram-negative bacterium, strain DS-44T, represents a new addition to the Algoriphagus genus within the Bacteroidetes phylum.

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Area of Science:

  • Microbiology
  • Bacteriology
  • Phylogenetics

Background:

  • Soil microbial communities harbor diverse bacterial species.
  • Accurate taxonomic classification is crucial for understanding bacterial roles and evolution.
  • The genus Algoriphagus, within the phylum Bacteroidetes, includes species with various ecological functions.

Purpose of the Study:

  • To isolate and characterize a novel bacterial strain from Korean soil.
  • To determine the taxonomic position of the novel strain DS-44T using a polyphasic approach.
  • To propose a new species within the genus Algoriphagus.

Main Methods:

  • Isolation of strain DS-44T from Dokdo soil.
  • Polyphasic taxonomic analysis including phenotypic characterization and phylogenetic analysis based on 16S rRNA gene sequencing.

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  • Analysis of major fatty acids and menaquinone content.

    • Main Results:

    • Strain DS-44T is a Gram-negative, non-motile, non-spore-forming bacterium.
    • Optimal growth conditions were determined as 25°C and 2% NaCl.
    • Phylogenetic analysis based on 16S rRNA gene sequences showed 93.8–95.7% similarity to known Algoriphagus species, indicating a distinct species.
    • Predominant menaquinone was MK-7, and major fatty acids included iso-C15:0 and C16:1ω7c/iso-C15:0 2-OH.
    • DNA G+C content was 49.0 mol%.

    Conclusions:

    • Strain DS-44T represents a novel species within the genus Algoriphagus.
    • The proposed name for this new species is Algoriphagus terrigena sp. nov.
    • This finding expands the known diversity of the Algoriphagus genus and highlights the microbial richness of Korean soils.