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Cultivation of Green Microalgae in Bubble Column Photobioreactors and an Assay for Neutral Lipids
Published on: January 7, 2019
Koreibacter algae gen. nov., sp. nov., isolated from seaweed
1Department of Science Education, Jeju National University, Jeju 690-756, Republic of Korea.
Summary
A novel Gram-positive actinomycete, Koreibacter algae gen. nov., sp. nov., was isolated from Korean seaweed. Phylogenetic and chemotaxonomic analyses confirm its unique taxonomic position within the Micrococcineae suborder.
Area of Science:
- Microbiology
- Bacteriology
- Taxonomy
Background:
- Actinomycetes are a diverse group of Gram-positive bacteria.
- Marine environments are rich sources of novel microbial diversity.
- Accurate bacterial classification is crucial for understanding microbial ecology and evolution.
Purpose of the Study:
- To isolate and characterize a novel actinomycete from a marine seaweed sample.
- To determine the phylogenetic and chemotaxonomic properties of the isolate.
- To propose a new genus and species for the novel bacterium.
Main Methods:
- Isolation of bacteria from seaweed samples.
- 16S rRNA gene sequencing for phylogenetic analysis.
- Chemotaxonomic analyses including peptidoglycan type, whole-cell sugars, menaquinone, fatty acid composition, and polar lipids.
- DNA G+C content determination.
Main Results:
- A novel Gram-positive, aerobic, non-motile, rod-shaped actinomycete, strain DSW-2(T), was isolated.
- Phylogenetic analysis revealed that strain DSW-2(T) belongs to the suborder Micrococcineae, forming a distinct clade with <96.4% 16S rRNA gene sequence similarity to known members.
- Chemotaxonomic data (peptidoglycan type A3alpha, Lys-Ser bridge, glucose and galactose, MK-9(H(4)), ai-C(15:0), phosphatidylglycerol, phosphatidylinositol) and DNA G+C content (68.3 mol%) supported its unique taxonomic status.
Conclusions:
- Strain DSW-2(T) represents a novel taxon within the suborder Micrococcineae.
- The proposed name for this novel taxon is Koreibacter algae gen. nov., sp. nov., with strain DSW-2(T) as the type strain.
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