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Updated: Dec 31, 2025
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Bioprospecting of Extremophilic Microorganisms to Address Environmental Pollution
Published on: December 30, 2021
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Sphingorhabdus soli sp. nov., isolated from Arctic soil
Yang Liu1, Juan Du1, Jun Zhang1
1State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Microbial Culture Collection Center (GDMCC), Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, PR China.
Summary
A novel bacterial strain, Sphingorhabdus soli, was discovered in Arctic soil. This strictly aerobic, Gram-negative bacterium expands the known diversity within the Sphingorhabdus genus.
Area of Science:
- Microbiology
- Environmental Science
- Bacterial Taxonomy
Background:
- The genus *Sphingorhabdus* comprises bacteria with significant roles in various ecosystems.
- Exploring microbial diversity in extreme environments like the Arctic is crucial for understanding adaptation and biogeochemical cycles.
Purpose of the Study:
- To isolate and characterize a novel bacterial strain from Arctic soil.
- To determine the phylogenetic and chemotaxonomic properties of the isolate.
- To formally propose a new species within the *Sphingorhabdus* genus.
Main Methods:
- Isolation and cultivation of bacteria from Arctic soil samples.
- Gram staining, aerobic growth tests, and motility assessment.
- Phylogenetic analysis using 16S rRNA gene sequences.
- Analysis of cellular fatty acids, polar lipids, and quinones.
- Determination of DNA G+C content.
Main Results:
- A novel Gram-negative, aerobic, rod-shaped, non-motile bacterial strain, D-2Q-5-6T, was isolated.
- Phylogenetic analysis showed <95.8% 16S rRNA gene sequence identity to known *Sphingorhabdus* species.
- Key fatty acids included summed feature 8 (31.4%), summed feature 3 (26.8%), and C14:0 2OH (11.7%).
- Predominant quinone was Q10, and DNA G+C content was 64.5 mol%.
Conclusions:
- Strain D-2Q-5-6T represents a novel species within the genus *Sphingorhabdus*.
- The proposed name for this new species is *Sphingorhabdus soli* sp. nov.
- The type strain is D-2Q-5-6T (=MCCC 1A06070T=KCTC 52311T).
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