Pine Wood Nematode
Pine Wood Nematode - Related Videos
11:08
Tests on Wood
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2023
Source: Roberto Leon, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA Wood is a ubiquitous material that has been used in construction from the earliest times. Wood is a renewable, sustainable material with great aesthetic value. Today, there are probably more buildings constructed with wood than any other structural material. Many of these buildings are singlefamily residences, but many larger apartment buildings, as well as commercial and industrial buildings,...
08:25
An Improved Method of RNA Isolation from Loblolly Pine (P. taeda L.) and Other Conifer Species
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Cited by 14 •
2010
Many plant tissues, including phloem and xylem from loblolly pine (Pinus taeda L.), contain high levels of phenolics and polysaccharides that interfere with RNA purification. This presentation discusses techniques for the harvest of field-grown tissues and isolation of RNA of sufficient quality for microarrays and other genomic analyses.
07:01
Processing the Loblolly Pine PtGen2 cDNA Microarray
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Cited by 6 •
2009
The cDNA microarray PtGen2 was developed for gene expression studies in loblolly pine, P. taeda, and other conifer species. Here, we show pre- and post-hybridization handling and washing techniques that can be used with this array to yield better consistency, reduced artifacts, and lower backgrounds.
08:42
Infection of In Vivo and In Vitro Pines with the Pinewood Nematode Bursaphelenchus xylophilus and Isolation of Induced Volatiles
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Cited by 1 •
2024
The protocol describes the in vivo and in vitro pinewood nematode infection of Pinus pinaster and their volatilome analysis through Gas Chromatography (GC) and GC coupled to Mass Spectrometry (GC-MS).
09:02
Visualizing Bacteria in Nematodes using Fluorescent Microscopy
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Cited by 20 •
2012
To study the mutualism between Xenorhabdus bacteria and Steinernema nematodes, methods were developed to monitor bacterial presence and location within nematodes. The experimental approach, which can be applied to other systems, entails engineering bacteria to express the green fluorescent protein and visualizing, using fluorescence microscopy bacteria within the transparent nematode.
FAQs
Monochamus beetles act as carriers that transfer nematodes to fresh feeding wounds on susceptible trees. This insect-mediated route is important because it connects beetle feeding activity with the point where nematodes enter a host. Studying that interaction helps explain how the disease moves among trees and why monitoring both beetles and wounded conifers can support outbreak control.
Fresh feeding wounds provide an entry point for nematodes carried by beetles. After entering, the nematodes reproduce and move through the tree’s resin canals. The wound therefore functions as more than surface damage: it links insect behavior to internal colonization and allows the biological process associated with pine wilt disease to begin.
Movement through resin canals allows pine wood nematodes to spread within the tree after entry. Their activity disrupts water transport, which helps explain the progression from internal infection to visible needle discoloration and wilting. This connection between nematode movement and impaired water delivery provides a biological basis for understanding rapid decline in susceptible conifers.
Rapid progression reflects the combined effects of nematode reproduction, movement through resin canals, and disruption of water transport. As water delivery is impaired, affected trees develop needle discoloration and wilting, followed by possible death. Susceptibility also matters, because the disorder does not affect all conifer hosts in the same way.
A practical investigation can combine forest health monitoring, laboratory diagnosis, and attention to insect-mediated transmission. Monitoring identifies concerning tree symptoms and distribution patterns, while laboratory diagnosis supports determining whether the nematode is involved. Examining beetle activity and fresh feeding wounds adds context about how the organism may have moved between trees.
Laboratory diagnosis helps distinguish suspected cases by providing evidence about the biological cause of tree decline. That information strengthens forest health assessments and supports decisions within quarantine programs. In combination with field monitoring, diagnosis can help researchers and land managers identify affected areas, evaluate disease spread, and focus efforts on limiting further outbreaks.
Quarantine programs are important because transmission involves both nematodes and beetle carriers moving between susceptible trees. Restricting or managing movement associated with affected areas can support efforts to limit outbreaks. These programs are especially relevant where pine and other conifer forests have economic or ecological importance and require coordinated protection.