Random dispersal of Bursaphelenchus xylophilus (Nematoda: Aphelenchoididae) in Pinus densiflora branches,Plant Pathology

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Random dispersal of Bursaphelenchus xylophilus (Nematoda: Aphelenchoididae) in Pinus densiflora branches
Plant Pathology ( IF 2.3 ) Pub Date : 2020-06-29 , DOI: 10.1111/ppa.13223
Katsumi Togashi ₁ , Koji Matsunaga ₁ , Yoh Arakawa ₁ , Naoto Miyamoto ₁

Affiliation

Bursaphelenchus xylophilus is the causative agent of pine wilt disease. These nematodes disperse in the cortical and wood resin canals of host tree branches in the early stage of infection. To determine whether the dispersal can be regarded as diffusion, we inoculated B. xylophilus into living or boiled Pinus densiflora branch sections and investigated the spatial distribution 24 hr later. Assuming that some nematodes disperse randomly in the axial direction of branch sections and the rest remain at the inoculation site, the coefficient of diffusion (D) by dispersers was estimated to be 23.7–40.7 and 109.4 cm²/day for the living and boiled branches, respectively. The proportion of nondispersers was estimated to be 0.46–0.79 and 0.52 for the living and boiled branches, respectively. When the nematodes were inoculated at the centre of upright living branch sections, they dispersed up and down at similar D values of 7.4 and 7.9 cm²/day, respectively.

中文翻译：

松树伯氏松线虫（线虫：Aphelenchoididae）在松果树枝中的随机散布

松材线虫（Bursaphelenchus xylophilus）是松萎病的病原体。在感染的早期，这些线虫散布在宿主树枝的皮质和木质树脂管中。为了确定是否可以将扩散视为扩散，我们将枯草芽孢杆菌接种到了活的或煮沸的松果枝分支部分中，并在24小时后调查了空间分布。假设某些线虫沿分支部分的轴向随机散布，其余的则留在接种部位，则估计散布器的扩散系数（D）为23.7–40.7和109.4 cm ²/天分别是活树枝和水煮树枝。活分支和煮沸分支的非分散剂的比例分别估计为0.46-0.79和0.52。当将线虫接种在直立的生活分支部分的中心时，它们分别以相似的D值7.4和7.9 cm ² / day向上和向下分散。

更新日期：2020-06-29

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