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Lysobacter dokdonensis sp. nov., isolated from soil.

Ki-Hoon Oh¹, So-Jung Kang¹, Yong-Taek Jung¹

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

International Journal of Systematic and Evolutionary Microbiology

|June 8, 2010

Summary

A novel bacterial species, Lysobacter dokdonensis, was identified from Korean soil. This Gram-negative bacterium, strain DS-58(T), is distinct from other Lysobacter species based on genetic and physical characteristics.

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Area of Science:

Microbiology
Bacterial Taxonomy
Phylogenetics

Background:

The family Xanthomonadaceae includes important plant pathogens and environmental bacteria.
The genus Lysobacter comprises diverse Gram-negative bacteria with various ecological roles.
Accurate bacterial classification is crucial for understanding microbial diversity and function.

Purpose of the Study:

To characterize a novel bacterial isolate from Dokdo, Korea.
To determine the taxonomic position of strain DS-58(T) within the family Xanthomonadaceae.
To propose a new species within the genus Lysobacter.

Main Methods:

Isolation and cultivation of bacterial strain DS-58(T) from soil.
Phylogenetic analysis using 16S rRNA gene sequences.
Phenotypic characterization including morphology and Gram staining.
Chemotaxonomic analysis of major fatty acids and ubiquinones.
DNA G+C content determination.

Main Results:

Strain DS-58(T) is a Gram-negative, non-motile, rod-shaped bacterium.
Phylogenetic analysis placed strain DS-58(T) within the genus Lysobacter, with 96.9% 16S rRNA gene similarity to Lysobacter niastensis GH41-7(T).
Chemotaxonomic data revealed Q-8 ubiquinone and specific major fatty acids (iso-C16:0, iso-C15:0, iso-C17:1ω9c).
DNA G+C content was 68.1 mol%.
Strain DS-58(T) showed distinct phenotypic and phylogenetic characteristics compared to known Lysobacter species.

Conclusions:

Strain DS-58(T) represents a novel species of the genus Lysobacter.
The proposed name for this new species is Lysobacter dokdonensis sp. nov.
The type strain is DS-58(T) (=KCTC 12822(T) =DSM 17958(T)).