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Pedobacter xinjiangensis sp. nov., from desert, Xinjiang
Yali Tang1, Yang Wang, Shanming Ji
1College of Life Sciences, Wuhan University, Wuhan 430072, P. R. China.
Journal of Microbiology and Biotechnology
|March 9, 2010
Summary
A novel aerobic bacterium, Pedobacter xinjiangensis sp. nov., was identified from China's Xinjiang desert. This Gram-negative, rod-shaped bacterium expands the known diversity within the Pedobacter genus.
Area of Science:
- Microbiology
- Bacteriology
- Taxonomy
Background:
- The genus Pedobacter comprises several species of Gram-negative, rod-shaped bacteria.
- Bacterial diversity in extreme environments like deserts remains incompletely characterized.
- Accurate taxonomic classification is crucial for understanding microbial roles and evolution.
Purpose of the Study:
- To perform a polyphasic taxonomic study of a bacterial isolate from the Xinjiang desert.
- To determine the phylogenetic and chemotaxonomic characteristics of the novel isolate.
- To establish and formally describe a new species within the Pedobacter genus.
Main Methods:
- Isolation and cultivation of the bacterial strain 12157(T) from a desert sample.
- Physiological and biochemical characterization, including optimal growth conditions (pH 7.0, 30°C).
- Chemotaxonomic analysis (predominant menaquinone: MK-7) and genotypic analysis (DNA G+C content: 42.0 mol%).
- Phylogenetic analysis using 16S rRNA gene sequences.
Main Results:
- Strain 12157(T) is a Gram-negative, rod-shaped, gliding, aerobic bacterium.
- Optimal growth observed at pH 7.0 and 30°C, with MK-7 as the predominant menaquinone.
- 16S rRNA gene sequence analysis revealed highest similarity (90.0–93.7%) to members of the genus Pedobacter.
- Combined phylogenetic, phenotypic, genotypic, and chemotaxonomic data supported its distinctiveness.
Conclusions:
- The isolated strain 12157(T) represents a novel species within the genus Pedobacter.
- The new species is named Pedobacter xinjiangensis sp. nov.
- Strain 12157(T) (=CCTCC AB 208092(T)=NRRL B-51338(T)) is proposed as the type strain for this new species.
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