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Updated: May 26, 2026

Isolation of Soil Microorganisms Using iChip Technology

Isolation of Soil Microorganisms Using iChip Technology

Published on: January 10, 2025

Deinococcus humi sp. nov., isolated from soil.

Sathiyaraj Srinivasan¹, Jae-Jin Lee¹, Sangyong Lim²

¹Department of Bio and Environmental Technology, Division of Environmental and Life Science, College of Natural Science, Seoul Women's University, 623 Hwarangno, Nowon-gu, Seoul 139-774, Republic of Korea.

International Journal of Systematic and Evolutionary Microbiology

|January 10, 2012

Summary

A novel red-pigmented bacterium, Deinococcus humi sp. nov., was isolated from South Korean soil. This strictly aerobic, Gram-positive bacterium exhibits radiation resistance, characteristic of the Deinococcus genus.

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Area of Science:

Microbiology
Bacteriology
Taxonomy

Background:

Soil harbors diverse microbial communities with potential for novel species discovery.
The genus Deinococcus is known for its radiation resistance and unique cellular characteristics.

Purpose of the Study:

To isolate and characterize a novel bacterium from a soil sample.
To determine the taxonomic position of the novel isolate using a polyphasic approach.

Main Methods:

Isolation and cultivation of bacteria from soil.
16S rRNA gene sequencing for phylogenetic analysis.
Chemotaxonomic analysis, including fatty acid profiling and cell wall composition.
DNA-DNA hybridization for relatedness studies.
Gamma radiation resistance testing.

Main Results:

A Gram-positive, aerobic, non-motile, red-pigmented bacterium (strain MK03(T)) was isolated.
Phylogenetic analysis placed strain MK03(T) within the genus Deinococcus, closely related to D. aerolatus.
Chemotaxonomic data and radiation resistance (D(10) > 9 kGy) were consistent with the Deinococcus genus.
Low DNA-DNA relatedness values indicated a distinct species.

Conclusions:

Strain MK03(T) represents a novel species within the genus Deinococcus.
The proposed name for the novel species is Deinococcus humi sp. nov.
This finding expands the known diversity of the Deinococcus genus in soil environments.