Sphingomonas flavus sp. nov. isolated from road soil

Area of Science:

• Microbiology
• Bacterial Taxonomy
• Environmental Microbiology

Background:

• The genus Sphingomonas comprises diverse Gram-negative bacteria found in various environments.
• Accurate classification of bacterial species is crucial for understanding microbial ecology and function.

Purpose of the Study:

• To characterize and classify a novel bacterial isolate from soil in the Republic of Korea.
• To determine the phylogenetic and chemotaxonomic properties of the novel strain.

Main Methods:

• Isolation and cultivation of bacteria from road soil.
• 16S rRNA gene sequencing for phylogenetic analysis.
• Chemotaxonomic analyses including fatty acid profiling, polyamine analysis, and respiratory quinone determination.
• DNA G+C content determination and phenotypic characterization.

Main Results:

• A yellow-colored, Gram-negative, aerobic, non-motile rod, designated THG-MM5(T), was isolated.
• Phylogenetic analysis based on 16S rRNA gene sequences showed moderate relatedness to known Sphingomonas species.
• Chemotaxonomic data revealed ubiquinone-10, sym-homospermidine, major fatty acids (summed feature 3, C18:1 ω7c, C16:0), and sphingoglycolipid.
• The DNA G+C content was 60.7 mol%.

Conclusions:

• The phenotypic and genotypic data support the classification of THG-MM5(T) as a representative of a novel species within the genus Sphingomonas.
• The novel species is named Sphingomonas flavus sp. nov., with THG-MM5(T) as the type strain.