Arthrobacter silvisoli sp. nov., isolated from forest soil

Area of Science:

• Microbiology
• Bacteriology
• Taxonomy

Background:

• Soil ecosystems harbor diverse microbial communities.
• The genus Arthrobacter is known for its metabolic versatility and presence in various environments.
• Accurate taxonomic classification is crucial for understanding microbial roles and functions.

Purpose of the Study:

• To isolate and characterize a novel bacterial strain from forest soil.
• To determine the phylogenetic and taxonomic position of the novel isolate.
• To propose a new species within the Arthrobacter genus.

Main Methods:

• Isolation and cultivation of bacteria from forest soil samples.
• Morphological, physiological, and biochemical characterization of the isolate.
• Phylogenetic analysis using 16S rRNA gene sequences.
• Genomic analysis including Average Nucleotide Identity (ANI) and in silico DNA-DNA hybridization (DDH).
• Chemotaxonomic analyses (fatty acid composition, polar lipids, menaquinone, cell wall peptidoglycan, and whole-cell sugars).

Main Results:

• A novel Gram-positive, strictly aerobic bacterium, designated NEAU-SA1^T, was isolated.
• The isolate exhibited a rod-coccus growth cycle and optimal growth at 28°C and pH 7.0.
• Phylogenetic analysis placed NEAU-SA1^T within the genus Arthrobacter, closely related to Arthrobacter cupressi.
• Genomic analyses (ANI and in silico DDH) confirmed that NEAU-SA1^T represents a distinct species.
• Chemotaxonomic data supported the classification of NEAU-SA1^T as a new Arthrobacter species.

Conclusions:

• Strain NEAU-SA1^T represents a novel species of the genus Arthrobacter.
• The proposed name for this new species is Arthrobacter silvisoli sp. nov.
• The type strain is NEAU-SA1^T (=DSM 106716^T=CCTCC AB 2017271^T).