Arthrobacter celericrescens sp. nov., isolated from forest soil

Area of Science:

• Microbiology
• Bacterial Taxonomy
• Environmental Microbiology

Background:

• The genus Arthrobacter is known for its diverse roles in soil ecosystems.
• Accurate classification of novel bacterial strains is crucial for understanding microbial diversity and function.

Purpose of the Study:

• To characterize a novel bacterial isolate from forest soil using a polyphasic approach.
• To determine the taxonomic position of the novel strain within the genus Arthrobacter.

Main Methods:

• Polyphasic characterization including phenotypic, phylogenetic (16S rRNA gene sequencing, MLSA), and chemotaxonomic analyses.
• Genomic analysis including average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH).

Main Results:

• Strain NEAU-SA2^T is an aerobic, Gram-positive, non-flagellated, rod-coccus-shaped bacterium.
• Phylogenetic analyses placed NEAU-SA2^T within the Arthrobacter genus, closely related to A. cupressi and A. silvisoli.
• ANI and dDDH values were below the thresholds for species delineation, confirming NEAU-SA2^T as a distinct species.
• Major fatty acids included anteiso-C15:0, anteiso-C17:0, and C16:0; MK-9(H2) was the predominant quinone.

Conclusions:

• Strain NEAU-SA2^T represents a novel species, Arthrobacter celericrescens sp. nov.
• The proposed name reflects the rapid growth characteristics observed in the study.
• The findings contribute to the taxonomic understanding of the Arthrobacter genus.