Bacillus solimangrovi sp. nov., isolated from mangrove soil

Area of Science:

• Microbiology
• Bacterial Taxonomy
• Environmental Microbiology

Background:

• Mangrove ecosystems harbor diverse microbial communities with unique adaptations.
• The genus Bacillus is known for its ecological versatility and biotechnological potential.
• Characterization of novel bacterial isolates is crucial for understanding biodiversity and discovering new functions.

Purpose of the Study:

• To isolate and characterize novel bacterial strains from mangrove soil.
• To determine the taxonomic placement of the novel strains using a polyphasic approach.
• To propose a new species within the genus Bacillus.

Main Methods:

• Isolation of bacterial strains from mangrove soil.
• Polyphasic characterization including 16S rRNA and groEL gene sequencing.
• Physiological and biochemical tests, including growth conditions, cell-wall analysis, and DNA-DNA hybridization.

Main Results:

• Two novel, strictly aerobic, Gram-positive, endospore-forming bacterial strains, GH2-4T and GH2-5, were isolated.
• 16S rRNA gene sequence similarity to related Bacillus species was below 96%, and groEL sequence similarity was below 85%.
• DNA-DNA relatedness between the isolates and reference strains was low (20-24%), and between the two isolates was 81%, supporting their classification as a new species, Bacillus solimangrovi.

Conclusions:

• Strains GH2-4T and GH2-5 represent a novel species of the genus Bacillus, named Bacillus solimangrovi.
• The type strain GH2-4T exhibits distinct physiological and genetic characteristics.
• This discovery expands the known diversity of Bacillus species in mangrove environments.