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Sporichthya brevicatena sp. nov
T Tamura1, M Hayakawa, K Hatano
1Institute for Fermentation, Osaka, Japan. k90089@simail.ne.jp
International Journal of Systematic Bacteriology
|November 11, 1999
Summary
A novel soil bacterium, Sporichthya brevicatena, was identified by its unique aerial mycelium and motile spores. This new species, distinct from Sporichthya polymorpha, expands the Sporichthya genus.
Area of Science:
- Microbiology
- Bacteriology
- Systematic Bacteriology
Background:
- Soil harbors diverse microbial communities with largely uncharacterized species.
- The genus Sporichthya comprises actinomycetes with specific morphological and chemotaxonomic features.
Purpose of the Study:
- To isolate and characterize a novel soil bacterium.
- To determine the taxonomic placement of the new isolate within the genus Sporichthya.
- To propose a new species based on distinct characteristics.
Main Methods:
- Morphological analysis of aerial and substrate mycelium.
- Chemotaxonomic analysis including cell wall amino acids and menaquinone.
- Phylogenetic analysis based on 16S rRNA gene sequencing.
- DNA-DNA hybridization for species differentiation.
Main Results:
- Isolation of a soil bacterium forming short chains of aerial mycelium with motile spores.
- Chemotaxonomic data revealed menaquinone 9(H8) and LL-diaminopimelic acid.
- DNA G + C content was determined to be 71 mol%.
- Phylogenetic and DNA-DNA hybridization results indicated the strain is distinct from Sporichthya polymorpha.
Conclusions:
- The isolated strain represents a new species within the genus Sporichthya.
- The new species is named Sporichthya brevicatena sp. nov.
- The type strain is S. brevicatena YU720-21T (= IFO 16195T).