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Extraction and Analysis of Microbial Phospholipid Fatty Acids in Soils
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Phyllobacterium pellucidum sp. nov., isolated from soil.

Yuna Park1, Leonid N Ten2, Soohyun Maeng1

  • 1Department of Bio and Environmental Technology, College of Natural Science, Seoul Women's University, Seoul, 01797, Republic of Korea.

Archives of Microbiology
|March 12, 2021
PubMed
Summary

A novel bacterial species, Phyllobacterium pellucidum, was identified from Korean soil. This Gram-negative bacterium expands the known diversity within the Phyllobacterium genus.

Keywords:
Novel speciesPhyllobacteriumPhyllobacterium pellucidumTaxonomy

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Area of Science:

  • Microbiology
  • Bacteriology
  • Phylogenetics

Background:

  • The genus Phyllobacterium comprises plant-associated bacteria known for their roles in nitrogen cycling and plant growth promotion.
  • Exploring bacterial diversity in soil ecosystems is crucial for understanding microbial functions and potential biotechnological applications.

Purpose of the Study:

  • To isolate and characterize a novel bacterial strain from Korean soil.
  • To determine the taxonomic affiliation of the isolate using polyphasic characterization, including phylogenetic and chemotaxonomic analyses.

Main Methods:

  • Isolation of bacterial strain BT25 from soil.
  • Phylogenetic analysis based on 16S rRNA gene sequences.
  • Determination of average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values.
  • Analysis of cellular fatty acid composition, quinones, and polar lipids.

Main Results:

  • Strain BT25 was identified as a Gram-negative, rod-shaped bacterium.
  • Phylogenetic analysis indicated its relationship to the genus Phyllobacterium, with high 16S rRNA gene sequence similarity to P. brassicacearum and P. myrsinacearum.
  • ANI and dDDH values confirmed that BT25 represents a distinct species.
  • Chemotaxonomic analysis revealed characteristic fatty acid profiles, menaquinone Q-10, and specific polar lipids.

Conclusions:

  • The isolated strain BT25 represents a novel species within the genus Phyllobacterium.
  • The proposed name for this new species is Phyllobacterium pellucidum sp. nov.
  • This finding contributes to the understanding of bacterial diversity and the Phyllobacterium genus.