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An Optimized Enrichment Technique for the Isolation of Arthrobacter Bacteriophage Species from Soil Sample Isolates
Published on: April 9, 2015
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Sphingomonas agri sp. nov., a bacterium isolated from soil
Muhammad Zubair Siddiqi1,2, Gyu-Min Choi1,2, Sang Yong Kim3
1Department of Biotechnology, Hankyong National University, 327 Chungang-no Anseong-si, Kyonggi-do 17579, Republic of Korea.
International Journal of Systematic and Evolutionary Microbiology
|September 26, 2017
Summary
A novel soil bacterium, Sphingomonas agri sp. nov. HKS-06T, was identified using polyphasic taxonomy. This new species is distinct from known Sphingomonas species based on genetic and phenotypic analyses.
Area of Science:
- Microbiology
- Bacteriology
- Taxonomy
Background:
- The genus Sphingomonas comprises diverse Gram-negative bacteria with significant ecological roles.
- Accurate bacterial classification is crucial for understanding microbial communities and their functions.
Purpose of the Study:
- To taxonomically characterize a novel bacterial isolate from soil.
- To determine the phylogenetic and genotypic relationship of the isolate to existing species within the Sphingomonas genus.
Main Methods:
- Polyphasic taxonomic characterization including 16S rRNA gene sequencing.
- Genomic DNA G+C content determination.
- Chemotaxonomic analysis (major quinone, polar lipids, fatty acids).
- DNA-DNA hybridization for genotypic differentiation.
Main Results:
- Strain HKS-06T, a Gram-negative, aerobic rod, showed optimal growth at 30°C and pH 6.5-7.0.
- Phylogenetic analysis placed HKS-06T within the Sphingomonas genus, closely related to Sphingomonas lutea (97.4% 16S rRNA similarity).
- Chemotaxonomic data and DNA-DNA relatedness (20.24%) confirmed HKS-06T as a distinct species.
Conclusions:
- The novel isolate HKS-06T represents a new species within the genus Sphingomonas.
- The proposed name for this new species is Sphingomonas agri sp. nov.
- The type strain is HKS-06T (=KACC 18880T=LMG 29563T).
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