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Erythrobacter arachoides sp. nov., isolated from ice core
Tingting Xing1,2, Yongqin Liu2,3,4, Ninglian Wang3,5
1Key Laboratory of Alpine Ecology and Biodiversity, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, PR China.
International Journal of Systematic and Evolutionary Microbiology
|September 19, 2017
Summary
A novel bacterial strain, Erythrobacter arachoides sp. nov. RC4-10-4T, was discovered on the Tibetan Plateau. This Gram-negative bacterium expands the known diversity within the Erythrobacter genus.
Area of Science:
- Microbiology
- Bacterial Taxonomy
- Environmental Microbiology
Background:
- The genus Erythrobacter comprises aerobic, Gram-negative bacteria known for their diverse habitats.
- Glaciers represent unique environments for microbial life, yet their bacterial communities are underexplored.
Purpose of the Study:
- To isolate and characterize a novel bacterial strain from glacial ice.
- To determine the taxonomic placement of the novel isolate within the Erythrobacter genus.
Main Methods:
- Isolation and cultivation of bacterial strain RC4-10-4T from glacier samples.
- Phenotypic characterization including optimal growth conditions, fatty acid profiling, and polar lipid analysis.
- Phylogenetic analysis using 16S rRNA gene sequencing and DNA-DNA hybridization.
Main Results:
- Strain RC4-10-4T is a Gram-negative, rod-shaped bacterium with optimal growth at pH 7.0, 25°C, and 2% NaCl.
- Major fatty acids include summed features 3 and 8, and C16:0; major polar lipids are phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, sphingoglycolipid, and phosphatidylcholine.
- Phylogenetic analysis and DNA-DNA hybridization values indicate that strain RC4-10-4T represents a novel species, Erythrobacter arachoides sp. nov.
Conclusions:
- Erythrobacter arachoides sp. nov. is proposed as a new species within the Erythrobacter genus.
- The discovery highlights the potential for novel microbial life in extreme glacial environments.
- This finding contributes to our understanding of bacterial diversity on the Tibetan Plateau.
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