Aneurinibacillus sediminis sp. nov., isolated from lagoon sediments

Area of Science:

• Microbiology
• Bacterial Taxonomy
• Environmental Microbiology

Background:

• Lagoon sediments harbor diverse microbial communities.
• Bacterial taxonomy relies on detailed phenotypic and genotypic characterization.
• The genus Aneurinibacillus comprises spore-forming, aerobic bacteria.

Purpose of the Study:

• To isolate and characterize novel bacterial strains from lagoon sediments.
• To determine the taxonomic position of isolated strains using polyphasic methods.
• To propose a new species within the genus Aneurinibacillus.

Main Methods:

• Isolation of bacterial strains from lagoon sediment samples.
• Phenotypic characterization including morphology, Gram staining, motility, and growth conditions (temperature, pH, NaCl).
• Genotypic characterization involving 16S rRNA gene sequencing, DNA-DNA reassociation, and analysis of cellular fatty acids and polar lipids.

Main Results:

• Two obligately aerobic, Gram-positive, spore-forming, motile rod strains (1-10M-8-7-50T and 1M) were isolated.
• Strains exhibited optimal growth at 40-42°C, pH 7.0-7.5, and 0-0.8% NaCl.
• 16S rRNA gene sequence similarity and DNA-DNA reassociation values indicated that the strains represent a novel species, Aneurinibacillus sediminis sp. nov.

Conclusions:

• The isolated strains possess distinct morphological, physiological, and genotypic characteristics.
• Aneurinibacillus sediminis sp. nov. is proposed as a novel species based on comprehensive analysis.
• Strain 1-10M-8-7-50T is designated as the type strain for Aneurinibacillus sediminis.