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Micrococcus flavus sp. nov., isolated from activated sludge in a bioreactor
Xing-Yu Liu1,2, Bao-Jun Wang2, Cheng-Ying Jiang2
1Graduate University of Chinese Academy of Sciences, Beijing 100049, China.
International Journal of Systematic and Evolutionary Microbiology
|January 16, 2007
Summary
A novel bacterial species, Micrococcus flavus, was identified from wastewater bioreactors. This Gram-positive coccus exhibits unique fatty acid profiles and represents a new addition to the Micrococcus genus.
Area of Science:
- Microbiology
- Bacterial Taxonomy
- Environmental Microbiology
Background:
- Wastewater treatment bioreactors harbor diverse microbial communities.
- Characterization of novel bacterial isolates is crucial for understanding microbial ecology and potential applications.
Purpose of the Study:
- To isolate and characterize a novel bacterial strain from activated sludge.
- To determine the phylogenetic and taxonomic position of the novel isolate.
Main Methods:
- Isolation and cultivation on LB agar.
- Morphological, physiological, and biochemical characterization.
- 16S rRNA gene sequencing and DNA-DNA hybridization.
Main Results:
- Strain LW4(T) are Gram-positive cocci with yellow colonies.
- Optimal growth observed between 26-34°C and pH 5-9.
- Phylogenetic analysis placed LW4(T) within the Micrococcus genus, with DNA-DNA relatedness below 70% to known species.
- Fatty acid composition and quinone profiles were determined.
Conclusions:
- Strain LW4(T) represents a novel species of the genus Micrococcus.
- The proposed name for this new species is Micrococcus flavus sp. nov.
- The type strain is LW4(T) (=CGMCC 1.5361(T)=JCM 14000(T)).
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