Factors affecting pathogenicity of Japanese oak wilt pathogens

本研究的目的是阐明日本栎枯萎病的发生机制，探讨影响病原菌Raffaelea quercivora致病性的因素和病原菌的起源。由于该疾病可在国外暴发，我们在亚洲国家清点了Raffaelea属成员。结果发现了以下问题：1. 病原菌的酶活性与致病性有关。寄主树种通过静态和动态响应的复杂防御机制可能影响壳斗科树种间的敏感性差异。部分外来壳斗科植物对该病害的易感性可能较高；鸭嘴兽属、嘴兽属和鸭嘴兽科昆虫分布于亚洲各国。

The aim of this study was to clarify occurrence mechanisms of Japanese oak wilt disease exploring both factors affecting the pathogenicity of a pathogen, Raffaelea quercivora and the origin of the pathogen. Since the disease can be outbreak in abroad, we inventoried members of the genus Raffaelea in Asian countries. As the results, following issues were found ; 1. Enzymatic activity of the pathogen was associated with pathogenicity, 2. Complex defense mechanisms of host trees species via both static and dynamic responses might be affecting differences of susceptibility among the fagaceae species, 3. Some foreign fagaceae species might be higher in their susceptibility against this disease, and 4. Members of Raffaelea species, Platypus quercivorous, and Platypodidae insects were distributed in Asian countries.