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Sinomicrobium soli sp. nov., isolated from arctic soil
Xiupian Liu1, Qiliang Lai1, Yaping Du1
1Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, State Key Laboratory Breeding Base of Marine Genetic Resources, Fujian Key Laboratory of Marine Genetic Resources, Xiamen 361005, PR China.
International Journal of Systematic and Evolutionary Microbiology
|February 13, 2019
Summary
A novel bacterial species, Sinomicrobium soli sp. nov., was identified from Arctic soil. This Gram-negative bacterium exhibits unique physiological and genetic traits, expanding the Sinomicrobium genus.
Area of Science:
- Microbiology
- Bacterial Taxonomy
- Arctic Microbiology
Background:
- Arctic soil harbors diverse microbial communities.
- The genus Sinomicrobium includes bacteria with various metabolic capabilities.
- Characterization of novel Arctic microorganisms is crucial for understanding extremophile biology.
Purpose of the Study:
- To isolate and characterize a novel bacterial strain from Arctic soil.
- To determine the taxonomic position of the isolate using polyphasic methods.
- To propose a new species within the genus Sinomicrobium.
Main Methods:
- Isolation of bacteria from Arctic soil samples.
- Phenotypic characterization including growth conditions (NaCl, pH, temperature).
- Phylogenetic analysis based on 16S rRNA gene sequencing.
- Chemotaxonomic analysis (fatty acids, menaquinone, polar lipids).
- DNA G+C content determination.
Main Results:
- A novel Gram-negative, short-rod bacterium, strain N-1-3-6T, was isolated.
- The strain showed optimal growth at 0.5-2% NaCl, pH 7.0, and 28-37°C.
- Phylogenetic analysis placed it within the Sinomicrobium genus, with 95.3% 16S rRNA similarity to S. pectinilyticum.
- Key chemotaxonomic features included MK-6, phosphatidylethanolamine, and specific fatty acids (iso-C15:0, summed feature 3, iso-C17:0 3-OH).
- DNA G+C content was 47.7 mol%.
Conclusions:
- Strain N-1-3-6T represents a new species of the genus Sinomicrobium.
- The proposed name is Sinomicrobium soli sp. nov., with strain N-1-3-6T as the type strain.
- This finding contributes to the knowledge of bacterial diversity in Arctic environments.
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