Boarding abilities of Bursaphelenchus mucronatus and B. xylophilus (Nematoda: Aphelenchoididae) on Monochamus alternatus (Coleoptera: Cerambycidae)
Boarding abilities of Bursaphelenchus mucronatus and B. xylophilus (Nematoda: Aphelenchoididae) on Monochamus alternatus (Coleoptera: Cerambycidae)
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DOI：
10.1163/156854103773040745
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发表时间：
2003
期刊：
影响因子：
1.2
通讯作者：
S. Jikumaru;K. Togashi
中科院分区：
文献类型：
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作者：
S. Jikumaru;K. Togashi
拟松材线虫（Bursaphelenchus mucronatus）与松材线虫（Bursaphelenchus xylophilus）关系密切，是松树萎蔫病的病原。这两种线虫在宿主松树之间传播的第四阶段的传播幼虫（JIV）的昆虫载体。在B入侵日本之后。xylophilus，B. B.在疾病传播过程中，松树林中原产于日本的mucronatus似乎已被取代。为了帮助理解这一物种的替代，在实验室中使用松墨天牛甲虫比较了两种线虫物种之间昆虫载体携带的JIV数量（初始线虫负载）。B的初始载荷。mucronatus显著小于B。xylophilus，虽然第三阶段的传播少年（JIII）集中在蛹室的数量没有差异。统计分析表明，在解释B初始负荷差异的三个分量中，JIII换羽与JIV换羽的比例最重要。而对B来说，JIII的数量主要集中在蛹室。木生植物线虫和它的载体之间的电泳亲和力进行了讨论，其在物种更替中的作用。
Bursaphelenchus mucronatus is closely related to Bursaphelenchus xylophilus, the causative agent of pine wilt disease. Both nematodes are transmitted between host pine trees as the fourth-stage dispersal juveniles (JIV) by insect vectors. After the invasion of Japan by B. xylophilus, B. mucronatus, native to Japan, appears to have been replaced in the pine forests during the spread of the disease. To help understand this species replacement, the number of JIV carried by an insect vector (the initial nematode load) was compared between the two nematode species by using the beetle, Monochamus alternatus, in the laboratory. The initial load of B. mucronatus was significantly smaller than that of B. xylophilus although the number of third-stage dispersal juveniles (JIII) concentrated at the pupal chambers did not differ. Statistical analysis showed that the proportion of JIII moulting to JIV was the most important among three components explaining the difference in the initial load of B. mucronatus while the number of JIII concentrated at the pupal chamber was the most important for B. xylophilus. The phoretic affinity between the nematode and its vector is discussed in relation to its role in the species replacement.