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Updated: Jun 21, 2026
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An Approach to Constructing Multispecies Biofilm Communities from Rhizosphere Soil
Published on: May 24, 2024
Kineococcus rhizosphaerae sp. nov., isolated from rhizosphere soil
1Department of Science Education, Cheju National University, Jeju 690-756, Republic of Korea. sdlee@cheju.ac.kr
Summary
A novel orange-colored bacterium, Kineococcus rhizosphaerae sp. nov., was discovered in soil. Phylogenetic and chemotaxonomic analyses confirm it represents a new species within the Kineococcus genus.
Area of Science:
- Microbiology
- Bacteriology
- Phylogenetics
Background:
- The genus Kineococcus comprises Gram-positive, aerobic cocci.
- Members of this genus have been isolated from various environments, including soil and radiation-contaminated sites.
Purpose of the Study:
- To characterize a novel actinomycete strain, designated RP-B16T, isolated from rhizosphere soil.
- To determine the taxonomic position of strain RP-B16T within the genus Kineococcus.
Main Methods:
- Isolation and cultivation of actinomycete strain RP-B16T from soil.
- Phylogenetic analysis based on 16S rRNA gene sequences.
- Chemotaxonomic analyses including fatty acid profiling, menaquinone analysis, and polar lipid composition.
- DNA-DNA hybridization for relatedness studies.
Main Results:
- Strain RP-B16T is a motile, Gram-positive coccus with specific oxidase and catalase activities.
- Phylogenetic analysis placed strain RP-B16T within the Kineococcus genus, closely related to K. aurantiacus and K. radiotolerans.
- Chemotaxonomic data were consistent with the genus Kineococcus, with anteiso-C15:0 as the predominant fatty acid and MK-9(H2) as the major menaquinone.
- DNA-DNA relatedness values were below 40% with closely related species, supporting its status as a new species.
Conclusions:
- Strain RP-B16T represents a novel species of the genus Kineococcus.
- The proposed name for this new species is Kineococcus rhizosphaerae sp. nov.
- The type strain is RP-B16T (=KCTC 19366T=DSM 19711T).
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