Ramlibacter paludis sp. nov., isolated from wetland

Area of Science:

• Microbiology
• Bacteriology
• Environmental Science

Background:

• The genus Ramlibacter comprises bacteria isolated from various environmental sources.
• Understanding bacterial diversity is crucial for ecological and biotechnological applications.

Purpose of the Study:

• To characterize a novel bacterial isolate from a South Korean wetland.
• To determine the taxonomic placement of the isolate within the Ramlibacter genus.

Main Methods:

• Isolation and cultivation of bacteria from wetland soil samples.
• 16S rRNA gene sequencing for phylogenetic analysis.
• Average Nucleotide Identity (ANI) and digital DNA-DNA hybridization (dDDH) for genomic comparison.
• Physiological, biochemical, and chemotaxonomic analyses.

Main Results:

• A novel Gram-negative, aerobic, non-motile, rod-shaped bacterium, designated XY19^T, was isolated.
• Phylogenetic analysis based on 16S rRNA gene sequencing showed close relatedness to existing Ramlibacter species.
• ANI and dDDH values confirmed that strain XY19^T represents a new species.
• Physiological and biochemical tests differentiated strain XY19^T from related species, supporting its novel status.
• The DNA G+C content was 68.7 mol%, major respiratory quinone was Q-8, and major fatty acids were identified.

Conclusions:

• Strain XY19^T is proposed as a novel species, Ramlibacter paludis sp. nov.
• The discovery of Ramlibacter paludis sp. nov. expands the known biodiversity of the Ramlibacter genus.
• This finding contributes to the understanding of microbial communities in wetland ecosystems.