Related Experiment Video
Updated: Jul 10, 2026
11:35
Replication of the Ordered, Nonredundant Library of Pseudomonas aeruginosa strain PA14 Transposon Insertion Mutants
Published on: May 4, 2018
Pedobacter terrae sp. nov., isolated from soil.
Jung-Hoon Yoon1, So-Jung Kang1, Tae-Kwang Oh1
1Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon, Korea.
International Journal of Systematic and Evolutionary Microbiology
|November 6, 2007
Summary
A novel bacterial species, Pedobacter terrae, was identified from Korean soil. This Gram-negative bacterium is distinct from other Pedobacter species based on genetic and phenotypic analyses.
Area of Science:
- Microbiology
- Bacterial Taxonomy
- Genomics
Background:
- Soil harbors diverse microbial communities with largely uncharacterized species.
- Accurate bacterial classification is crucial for understanding ecological roles and potential applications.
Purpose of the Study:
- To taxonomically characterize a novel bacterial isolate, strain DS-57T, from Dokdo, Korea.
- To determine if strain DS-57T represents a new species within the genus Pedobacter.
Main Methods:
- Polyphasic taxonomic analysis including phenotypic characterization and phylogenetic analysis based on 16S rRNA gene sequencing.
- Determination of major menaquinone and fatty acid profiles.
- DNA G+C content and DNA-DNA relatedness analyses.
Main Results:
- Strain DS-57T is a Gram-negative, non-motile rod, growing optimally at 25°C with 0-0.5% NaCl.
- Phylogenetic analysis showed closest relationship to the genus Pedobacter, with 16S rRNA gene similarities up to 99.2%.
- DNA-DNA relatedness values were below 45%, and distinct phenotypic properties supported its classification as a new species, Pedobacter terrae.
Conclusions:
- Strain DS-57T is phenotypically and phylogenetically distinct from known Pedobacter species.
- The novel species Pedobacter terrae sp. nov. is proposed, with strain DS-57T as the type strain.
- This finding expands the known diversity within the genus Pedobacter.
Related Concept Videos
01:26Bacterial Phylum Bacteroidota
The phylum Bacteroidota includes over 700 species classified into four primary orders: Bacteroidales, Cytophagales, Flavobacteriales, and Sphingobacteriales. These gram-negative, non-sporulating rods exhibit saccharolytic capabilities and can be aerobic or fermentative, encompassing obligate aerobes, facultative aerobes, and obligate anaerobes. Many species display gliding motility, though some are nonmotile or use flagella. The genus Bacteroides is well-studied due to its significant role in...
01:18Deep Sea Microbial Ecology
The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches extending beyond...
01:30Bacterial Phylum Actinobacteria
Coryneform bacteria are gram-positive, aerobic, nonmotile rods that exhibit irregular, club-shaped, or V-shaped arrangements. Their V-shape results from snapping division, where the inner cell wall layer forms the cross-wall, while the outer layer remains intact until it ruptures on one side, causing the daughter cells to bend away.The primary genera are Corynebacterium and Arthrobacter. Corynebacterium includes diverse species, ranging from saprophytes to pathogens like Corynebacterium...
01:26Bacterial Phylum Verrucomicrobiota
The phylum Verrucomicrobiota comprises at least four characterized orders, with most species classified within the order Verrucomicrobiotales. Members of this phylum are either aerobic or facultatively aerobic, with the ability to ferment sugars. A notable exception is the genus Methylacidiphilum, which consists of aerobic methanotrophs. Additionally, some Verrucomicrobiota establish symbiotic relationships with protists. These bacteria are widely distributed across various environments,...
01:26Bacterial Phylum Proteobacteria
Proteobacteria, one of the largest and most diverse bacterial phyla, encompasses a wide range of Gram-negative bacteria distinguished by their outer membrane composed of lipopolysaccharides. These microorganisms exhibit various metabolic capabilities, including phototrophy, chemolithotrophy, and heterotrophy, and thrive in diverse environments from soil to aquatic systems and host-associated niches. The phylum is divided into six classes: Alphaproteobacteria, Betaproteobacteria,...
01:21Hyperthermophilic Bacteria
Domain Bacteria includes some unique hyperthermophilic species. They exhibit remarkable adaptations that enable survival in extreme environments.Thermotoga species are rod-shaped, gram-negative, non-sporulating hyperthermophiles that form a sheath-like envelope called a toga. They ferment sugars or starch, producing lactate, acetate, CO₂, and H₂, and can also grow via anaerobic respiration using H₂ and ferric iron. Found in hot springs and hydrothermal vents, over 20% of their genes show strong...