Related Experiment Video
Updated: Jan 26, 2026
09:38
Physical Isolation of Endospores from Environmental Samples by Targeted Lysis of Vegetative Cells
Published on: January 21, 2016
14.8K
Pectobacterium polonicum sp. nov. isolated from vegetable fields
Malgorzata Waleron1, Agnieszka Misztak1, Michal Waleron1
11Department of Biotechnology, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Abrahama, Poland.
Summary
Four novel pectinolytic bacteria strains from Polish groundwater represent a new species, Pectobacterium polonicum. This discovery expands the understanding of Pectobacterium diversity in agricultural environments.
Area of Science:
- Microbiology
- Bacteriology
- Plant Pathology
Background:
- Pectinolytic bacteria, particularly within the Pectobacterium genus, are significant plant pathogens.
- Understanding bacterial diversity is crucial for developing effective agricultural management strategies.
Purpose of the Study:
- To characterize and classify novel pectinolytic bacteria isolated from Polish groundwater.
- To determine if these isolates represent a new species within the Pectobacterium genus.
Main Methods:
- Polyphasic taxonomic analyses including multilocus sequence analysis (MLSA) of five housekeeping genes.
- In silico DNA-DNA hybridization (DDH) and average nucleotide identity (ANI) calculations.
- Phenotypic characterization, fatty acid methyl ester (FAME) profiling, rep-PCR fingerprinting, and MALDI-TOF mass spectrometry proteomic analysis.
Main Results:
- MLSA revealed distinctness from known Pectobacterium species, with P. punjabense, P. parmentieri, and P. wasabiae as closest relatives.
- Low in silico DDH (<43.1%) and ANI (<92.5%) values supported the delineation of a novel species.
- Phenotypic and genotypic data successfully differentiated the Polish strains from type strains of other Pectobacterium species.
Conclusions:
- The four Polish strains represent a novel species, Pectobacterium polonicum sp. nov.
- DPMP315T is proposed as the type strain for P. polonicum.
- This finding contributes to the taxonomic knowledge of the Pectobacterium genus and highlights bacterial diversity in agricultural soils.
More Related Videos
Related Concept Videos
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
48.4K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
48.4K
01:16Electric Field
12.3K
Consider two point charges, each exerting Coulomb force on the other. It is possible to describe the Coulomb interaction via an intermediate step by defining a new physical quantity called the electric field.
In the new picture, imagine that the first charge sets up an electric field independent of all other charges in the universe. When another charge comes in its vicinity, the second charge experiences an electric force depending on the electric field at that point. The source charge does not...
In the new picture, imagine that the first charge sets up an electric field independent of all other charges in the universe. When another charge comes in its vicinity, the second charge experiences an electric force depending on the electric field at that point. The source charge does not...
12.3K
01:27Magnetic Fields
7.2K
A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
A magnetic field is defined by the force that a charged particle experiences...
7.2K
01:30Electromagnetic Fields
2.7K
Electric fields generated by static charges, often referred to as electrostatic fields, are characteristically different from electric fields created by time-varying magnetic fields. While the former is a conservative field, implying that no net work is done on a test charge if it goes around in a complete loop in the field, the latter is, by definition, not a conservative field; net work is done, and it is proportional to the rate of change of magnetic flux.
However, the observation of...
However, the observation of...
2.7K
01:29Field Effect Transistor
1.2K
Field-effect transistors (FETs) are integral to electronic circuits and distinguished by their three-terminal setup: the gate, drain, and source. These transistors operate as unipolar devices, which utilize either electrons or holes as charge carriers, in contrast to bipolar transistors, which use both types of carriers. The primary function of the FET is to modulate the flow of these carriers from the source to the drain through a channel. The voltage difference between the gate and source...
1.2K
01:25Electric Field Lines
9.4K
The three-dimensional representation of the electric field of a positive point charge requires tracing the electric field vectors, whose lengths decrease as the square of their distance from the charge and which point away from the charge at each point. This vector field is no doubt challenging to visualize. The visualization of electric fields becomes quickly intractable as the number of charges increases.
The solution to this problem is to use electric field lines, which are not vectors but...
The solution to this problem is to use electric field lines, which are not vectors but...
9.4K