Novosphingobium fontis sp. nov., isolated from a spring

Area of Science:

• Microbiology
• Bacterial Taxonomy
• Phylogenetics

Background:

• The genus Novosphingobium comprises diverse bacterial species with various metabolic capabilities.
• Isolation and characterization of novel bacterial strains are crucial for understanding microbial diversity and ecological roles.

Purpose of the Study:

• To characterize a newly isolated bacterial strain, STM-14T, using a polyphasic taxonomic approach.
• To determine the phylogenetic position and taxonomic status of strain STM-14T within the genus Novosphingobium.

Main Methods:

• Polyphasic taxonomic characterization including phenotypic, chemotaxonomic, and phylogenetic analyses.
• 16S rRNA gene sequencing for phylogenetic inference.
• DNA-DNA hybridization for assessing genomic relatedness.
• Analysis of major fatty acids, polar lipids, polyamines, and isoprenoid quinones.

Main Results:

• Strain STM-14T is a Gram-stain-negative, aerobic, non-motile, rod-shaped bacterium.
• Phylogenetic analysis based on 16S rRNA gene sequences places strain STM-14T within the genus Novosphingobium, with highest similarity to Novosphingobium naphthae.
• DNA-DNA hybridization values between strain STM-14T and related species were below 49%, supporting its status as a distinct species.
• Differential phenotypic properties distinguish strain STM-14T from its closest relatives.

Conclusions:

• Strain STM-14T represents a novel species within the genus Novosphingobium.
• The proposed name for this new species is Novosphingobium fontis sp. nov.
• The type strain is STM-14T.