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Published on: December 17, 2015
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Hymenobacter gummosus sp. nov., isolated from a spring.
Wen-Ming Chen1, Wei-Ting Chen1, Chiu-Chung Young2
1Department of Seafood Science, Laboratory of Microbiology, National Kaohsiung Marine University, No. 142, Hai-Chuan Rd. Nan-Tzu, Kaohsiung City 811, Taiwan, ROC.
Summary
A novel Hymenobacter species, Hymenobacter gummosus ANT-18T, was identified from Taiwan spring water. This aerobic, Gram-negative bacterium exhibits unique fatty acid profiles and warrants classification as a new species.
Area of Science:
- Microbiology
- Bacterial Taxonomy
- Genomics
Background:
- The genus Hymenobacter comprises diverse bacteria, often isolated from soil and water environments.
- Accurate taxonomic classification is crucial for understanding microbial diversity and ecological roles.
Purpose of the Study:
- To characterize a novel bacterial isolate, strain ANT-18T, from a Taiwanese spring.
- To determine the phylogenetic and taxonomic position of strain ANT-18T within the Hymenobacter genus.
Main Methods:
- Polyphasic taxonomic analysis including 16S rRNA gene sequencing.
- Phylogenetic inference and DNA-DNA hybridization.
- Analysis of cellular fatty acid composition, isoprenoid quinones, polar lipids, and polyamines.
- Determination of optimal growth conditions (temperature, pH, salinity).
Main Results:
- Strain ANT-18T is a Gram-stain-negative, aerobic, motile, encapsulated, pink-pigmented rod.
- Phylogenetic analysis based on 16S rRNA gene sequences placed strain ANT-18T within the Hymenobacter genus, with high similarity to H. ocellatus and H. paludis.
- Distinct cellular fatty acid profiles (predominantly iso-C15:0, anteiso-C15:0, C18:0, and summed feature 4), MK-7 quinone, and unique polar lipid composition were observed.
- DNA-DNA relatedness values were below 35% with closely related species, supporting its status as a distinct species.
- Genomic DNA G+C content was 63.6 mol%.
Conclusions:
- Strain ANT-18T represents a novel species within the genus Hymenobacter.
- The proposed name for this new species is Hymenobacter gummosus sp. nov., with strain ANT-18T as the type strain.
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