Nocardioides rubroscoriae sp. nov., isolated from volcanic ash
1Department of Science Education, Jeju National University, Jeju, 690-756, Republic of Korea, sdlee@jejunu.ac.kr.
Antonie Van Leeuwenhoek
|April 4, 2014
Summary
A novel actinobacterium, Nocardioides rubroscoriae sp. nov., was discovered in volcanic scoria. This bacterium represents a new species within the Nocardioides genus, expanding microbial diversity knowledge.
Area of Science:
- Microbiology
- Actinobacteria Taxonomy
- Environmental Microbiology
Background:
- Actinobacteria are crucial in various environments.
- Scoria, a volcanic material, harbors unique microbial communities.
- The genus Nocardioides is known for its diverse metabolic capabilities.
Purpose of the Study:
- To taxonomically characterize a novel actinobacterium isolated from scoria.
- To determine the phylogenetic placement of the isolate within the Nocardioides genus.
- To propose a new species designation based on comprehensive analysis.
Main Methods:
- Polyphasic taxonomic characterization.
- Phylogenetic analysis using 16S rRNA gene sequences.
- Analysis of cell wall composition, menaquinone, polar lipids, and fatty acids.
- DNA G+C content determination and genomic DNA similarity assessment.
Main Results:
- The isolate, Sco-A25(T), is a rod-shaped actinobacterium.
- Phylogenetic analysis placed Sco-A25(T) within the Nocardioides genus, closely related to Nocardioides plantarum.
- Distinct chemotaxonomic and genomic features differentiated Sco-A25(T) from known species, with only 47.8% genomic DNA similarity to N. plantarum.
- Key chemotaxonomic markers included LL-Diaminopimelic acid, MK-8(H4) menaquinone, and specific polar lipids.
Conclusions:
- Strain Sco-A25(T) represents a novel species of the genus Nocardioides.
- The proposed name for this new species is Nocardioides rubroscoriae sp. nov.
- This discovery contributes to the understanding of microbial diversity in volcanic environments.
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