To evaluate the mechanisms of pathogenicity and non-pathogenicity of Bursaphelenchus xylophilus and B. mucronatus isolated in South Korea, we used 4-year-old P. thunbergii seedlings and 20-cm long one-year-old stem cuttings of 5-year-old Pinus thunbergii, and studied distributions and multiplications of pine wood nematodes after inoculation. The distributions of B. xylophilus in the 20-cm pine stem cuttings were not significantly different from that of B. mucronatus. Conversely, the proliferation rate of B. xylophilus on mycelial mats of Botrytis cinerea was significantly different from that of B. mucronatus. The study using 4-year-old P. thunbergii seedlings also showed that B. mucronatus can migrate to distal portions of the pine seedlings the same as B. xylophilus, but the populations of B. xylophilus remaining in the pine seedlings were relatively larger than those of B. mucronatus. Therefore, we concluded that the pathogenicity of B. xylophilus could be strongly influenced by its ability to multiply.
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http://dx.doi.org/10.5423/PPJ.OA.06.2012.0091 | DOI Listing |
Pest Manag Sci
January 2025
College of Forestry and Biotechnology, Zhejiang A & F University, Hangzhou, 311300, China.
Background: Bursaphelenchus xylophilus is considered a quarantine plant nematode species, that causes major damage to pine ecosystems globally. However, there are few reports on the identification and function of the sex pheromone receptors involved in mating. The function of Bxy-npr-21 as a potential sex pheromone receptor gene was verified from molecules to behaviors in this study.
View Article and Find Full Text PDFJ Vis Exp
December 2024
1State Key Laboratory of Tree Genetics and Breeding, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry; Comprehensive Experimental Center in Yellow River Delta of Chinese Academy of Forestry; Tianjin Institute of Forestry Science, Chinese Academy of Forestry;
Cryptobiosis is a state where organisms lose nearly all their internal water and enter anhydrobiosis under extreme environmental stress. The dispersal third-stage juveniles (pre-dauer juveniles, ) of Bursaphelenchus xylophilus can enter cryptobiosis through dehydration and revive upon rehydration when environmental conditions improve. Osmotic regulation is crucial for their survival in this process.
View Article and Find Full Text PDFMicroorganisms
December 2024
Key Laboratory of Forest Protection of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, No. 2 Dongxiaofu, Haidian, Beijing 100091, China.
Wood-decay fungi, including white- and brown-decay fungi, are well known for their ability to degrade lignin and cellulose, respectively. The combined use of these fungi can increase the decomposition of woody substrates. Research has indicated that these fungi also exhibit inhibitory effects against , the causative agent of pine wilt disease (PWD).
View Article and Find Full Text PDFInt J Mol Sci
December 2024
Co-Innovation Centre for Sustainable Forestry in Southern China, Forestry and Grassland, College of Soil and Water Conservation, Nanjing Forestry University, Nanjing 210037, China.
is one of the most destructive quarantine pests, causing irreversible damage to pine trees. However, the unexpected identification of pine wilt disease in Northern China indicates that can survive under low temperatures. In this study, we analyzed the reproductivity variations among 18 different isolates, and SC13 was identified to have excellent low temperature resistance.
View Article and Find Full Text PDFThe pine wood nematode (PWN), , is one of the most serious invasive forest pests, responsible for pine wilt disease (PWD). Currently, there are no effective, environmentally friendly control methods available. RNA interference (RNAi) technology has been extensively utilized to screen functional genes in eukaryotes and to explore sustainable pest management approaches through genetic engineering.
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