Tabrizicola caldifontis sp. nov., Isolated from Hot Spring Sediment Sample

Area of Science:

• Microbiology
• Bacteriology
• Environmental Microbiology

Background:

• Hot springs harbor unique microbial ecosystems with diverse bacterial species.
• The genus Tabrizicola includes bacteria with various environmental adaptations.
• Characterizing novel bacteria is crucial for understanding microbial diversity and evolution.

Purpose of the Study:

• To isolate and characterize a novel bacterial strain from a hot spring sediment sample.
• To determine the phylogenetic and taxonomic position of the novel strain.
• To propose a new species within the genus Tabrizicola.

Main Methods:

• Isolation and cultivation of bacterial strain YIM 73028^T from hot spring sediment.
• Phylogenetic analysis using 16S rRNA gene sequences.
• Determination of phenotypic, physiological, and chemotaxonomic characteristics (growth conditions, fatty acid profiles, G+C content).
• Genomic analysis including Average Nucleotide Identity (ANI) calculations.

Main Results:

• Strain YIM 73028^T is a Gram-negative, aerobic, non-motile bacterium.
• Phylogenetic analysis placed the strain within the genus Tabrizicola, with 97.0% 16S rRNA gene similarity to Tabrizicola aquatica.
• Optimal growth observed at 37-45 °C and pH 7.0-7.5.
• Genomic DNA G+C content was 65.7%, and ANI values were below the threshold for species delineation.
• The strain exhibited distinct phenotypic and genotypic characteristics differentiating it from known species.

Conclusions:

• Strain YIM 73028^T represents a novel species of the genus Tabrizicola.
• The proposed name for the novel species is Tabrizicola caldifontis sp. nov.
• This discovery contributes to the understanding of bacterial diversity in geothermal environments.