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Nocardioides hwasunensis sp. nov.

Soon Dong Lee¹, Dong Wan Lee, Jung-Sup Kim

¹Department of Science Education, Cheju National University, Jeju 690-756, Republic of Korea. sdlee@cheju.ac.kr

International Journal of Systematic and Evolutionary Microbiology

|January 8, 2008

Summary

Two novel actinomycete strains, Nocardioides hwasunensis sp. nov., were discovered in Jeju Island, Republic of Korea. These aerobic, Gram-positive bacteria represent a new species within the Nocardioides genus.

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Area of Science:

Microbiology
Bacteriology
Taxonomy

Background:

Actinomycetes are a diverse group of bacteria with significant ecological and biotechnological roles.
The genus Nocardioides is known for its metabolic versatility and presence in various environments.
Isolation of novel species is crucial for expanding our understanding of microbial diversity and potential applications.

Purpose of the Study:

To isolate and characterize novel actinomycete strains from marine environments.
To determine the taxonomic position of the isolates using polyphasic characterization.
To propose a new species within the genus Nocardioides.

Main Methods:

Isolation of actinomycetes from seawater samples.
Phenotypic characterization including morphology, growth conditions, and chemotaxonomic analyses (cell wall, menaquinone, fatty acids, polar lipids).
Molecular phylogenetic analyses based on 16S rRNA gene sequencing and DNA-BOX-PCR fingerprinting.

Main Results:

Two novel aerobic, Gram-positive, non-motile rod strains, HFW-18 and HFW-21(T), were isolated.
Chemotaxonomic data (LL-diaminopimelic acid, MK-8(H(4)), G+C content, fatty acid profile) were consistent with the genus Nocardioides.
Phylogenetic analysis based on 16S rRNA gene sequences placed the isolates within the Nocardioides genus, with N. ganghwensis JC2055(T) as the closest relative (97.4% similarity).

Conclusions:

The isolates HFW-18 and HFW-21(T) represent a novel species of the genus Nocardioides.
The proposed name for the new species is Nocardioides hwasunensis sp. nov.
The type strain is HFW-21(T) (=KCTC 19197(T)=DSM 18584(T)).