Hymenobacter ruber sp. nov., isolated from grass soil

Area of Science:

• Microbiology
• Bacteriology
• Taxonomy

Background:

• Soil microbiology is crucial for ecosystem health.
• The genus Hymenobacter, within the phylum Bacteroidetes, comprises diverse bacterial species.
• Accurate bacterial classification is essential for understanding microbial communities.

Purpose of the Study:

• To taxonomically characterize a novel bacterial isolate, strain PB156(T), from grass soil.
• To determine the phylogenetic placement of strain PB156(T) within the genus Hymenobacter.
• To propose a new species designation for the novel isolate.

Main Methods:

• Polyphasic taxonomic study including 16S rRNA gene sequencing.
• Comparative sequence analysis to determine phylogenetic relationships.
• Analysis of chemotaxonomic markers (fatty acids, polyamines, menaquinones) and DNA G+C content.

Main Results:

• Strain PB156(T) is a Gram-negative, aerobic, non-motile, rod-shaped bacterium.
• 16S rRNA gene sequence analysis showed highest similarity (96.4%) to Hymenobacter soli PB17(T), but distinct enough to warrant new species status.
• Chemotaxonomic data and DNA G+C content (61.7 mol%) supported the novel species designation.

Conclusions:

• Strain PB156(T) represents a novel species within the genus Hymenobacter.
• The proposed name for this new species is Hymenobacter ruber sp. nov.
• The type strain is PB156(T) (=KCTC 32477(T) = JCM 19433(T)).