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Isolation and Identification of Bacterial Strains from Skin of Terrestrial Amphibians

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Terrabacter terrigena sp. nov., isolated from soil.

Jung-Hoon Yoon¹, Sooyeon Park, So-Jung Kang

¹Korea Research Institute of Bioscience and Biotechnology, Taejon, Republic of Korea. jhyoon@kribb.re.kr

International Journal of Systematic and Evolutionary Microbiology

|July 25, 2009

Summary

A novel bacterium, Terrabacter terrigena sp. nov. strain ON10(T), was identified from Korean soil. This Gram-positive rod exhibits distinct phylogenetic and phenotypic characteristics, differentiating it from known Terrabacter species.

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Area of Science:

Microbiology
Bacteriology
Environmental Science

Background:

Soil microorganisms play crucial roles in ecosystem functions.
Wastewater treatment plants can be sources of novel bacterial isolates.
Accurate taxonomic classification is essential for understanding microbial diversity.

Purpose of the Study:

To taxonomically characterize a novel bacterial strain, designated ON10(T), isolated from soil near a wastewater treatment plant.
To determine the phylogenetic and phenotypic distinctiveness of strain ON10(T) within the genus Terrabacter.

Main Methods:

Polyphasic taxonomic approach including 16S rRNA gene sequencing.
Analysis of cell-wall composition (peptidoglycan type, sugars).
Determination of chemotaxonomic markers (menaquinone, polar lipids, fatty acids) and DNA G+C content.
DNA-DNA relatedness studies and phenotypic characterization.

Main Results:

Strain ON10(T) is a Gram-positive, non-motile, rod-shaped bacterium.
Phylogenetic analysis based on 16S rRNA gene sequences showed 98.4-98.8% similarity to Terrabacter species.
Chemotaxonomic data (cell wall, lipids, fatty acids) and DNA G+C content (71.6 mol%) were determined.
Low DNA-DNA relatedness (17-28%) to type strains of Terrabacter species confirmed its novelty.
Distinct phenotypic characteristics further differentiated strain ON10(T) from related species.

Conclusions:

Strain ON10(T) represents a novel species within the genus Terrabacter.
The proposed name for this new species is Terrabacter terrigena sp. nov.
This finding expands the known diversity of the Terrabacter genus and highlights soil associated with wastewater treatment plants as a reservoir for novel bacteria.