Pathogenesis in Pine Wilt Caused by Pinewood Nematode, Bursaphelenchus xylophilus.
Pathogenesis in Pine Wilt Caused by Pinewood Nematode, Bursaphelenchus xylophilus.
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发表时间：
1988-04
影响因子：
1.3
通讯作者：
R. F. Myers
中科院分区：
文献类型：
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作者：
R. F. Myers
事件的进展，在发展中的松树枯萎病后，由松材线虫入侵的审查，从早期迁移通过松树组织，直到症状发展的树叶。探讨了松树的抗病性，特别是在控制许多潜在害虫和病原体方面取得成功的过敏反应。由松材线虫活动引起的病理包括皮层的痕迹和空洞;形成层间隙和创伤性树脂囊的形成;皮层、韧皮部、形成层和射线组织的布朗宁和死亡;射线中细胞质的颗粒化和收缩;以及树脂道上皮和射线薄壁组织细胞的破坏。薄壁组织死亡、毒素产生以及油树脂和其他物质泄漏到管胞中是少数松林线虫迁移后松树发生的典型过敏反应。提出的假设是，一个蔓延的过敏反应的结果在一些观察到的病理和症状，并最终导致松树死亡。生长分化平衡假说被用来帮助解释易感性，松脂生产和毒性，易感性和抗性，以及气候变化对宿主松树的影响与松材线虫病有关。
The progression of events in the development of pine wilt disease following the invasion by Bursaphelenchus xylophilus is reviewed from early migration through pine tissues until symptom development on foliage. Disease resistance in pines, especially the hypersensitive reaction that is successful in controlling many potential pests and pathogens, is explored. Pathologies resulting from the activities of pinewood nematode include cortical trails and cavities; formation of cambial gaps and traumatic resin cysts; browning and death of cortex, phloem, cambium, and ray tissues; granulation and shrinkage of cell cytoplasm in rays; and destruction of resin canal epithelial and ray parenchyma cells. Death of parenchyma, production of toxins, and leakage of oleoresins and other material into tracheids are typical of the hypersensitive reaction occurring in pines following migration of small numbers of pinewood nematodes. The hypothesis presented is that a spreading hypersensitive reaction results in some of the observed pathologies and symptoms and eventually causes pine death. The growth-differentiation balance hypothesis is used to help explain predisposition, oleoresin production and toxicity, susceptibility and resistance, and the effects of variation in climate on host pines as related to pinewilt disease.