中国森林病虫2025，Vol.44Issue(3)：1-8,8.DOI:10.19688/j.cnki.issn1671-0886.20250018
弱毒真菌拟双色长喙壳诱导落叶松对强毒富士长喙壳抗性增强
Fungi with hypovirulence of Ophiostoma pseudobicolor induce resistance enhancement in Larix to hypervirulence of Endoconidiophora fujiensis
摘要
Abstract
Conifers have evolved excellent inducible defense mechanisms to resist various biotic and abiotic stresses in nature.In order to determine the weak toxicity of Ophiostoma pseudobicolor and the strong toxicity of Endoconidiophora fujiensis,the pathogenicity differences between the dominant species O.pseudobicolor and the pioneer species E.fujiensis associated with Ips subelongatus were evaluated by artificial inoculation and gas chromatography using five-year-old Larix kaempferi and Larix olgensis as experimental subjects.The inoculation experiments of two ophiostomatoid fungi were conducted to verify whether the pretreatment of O.pseudobicolor could induce resistance enhancement of the two species of Larix.The results showed that the necrotic lesions areas and total contents of host monoterpenes induced by E.fujiensis on L.kaempferi and L.olgensis were significantly higher than those induced by O.pseudobicolor,and the pathogenicity of E.fujiensis to the two species of larch was stronger.The phloem necrotic lesions areas of the two species of larch decreased by 79.52%and 48.82%,respectively,after inoculating with O.pseudobicolor and then inoculating with E.fujiensis.It was demonstrated that pretreatment with hypovirulent fungus O.pseudobicolor could induce resistance in L.kaempferi and L.olgensis to hypervirulence of E.fujiensis.The experimental results can provide new ideas and methods for the prevention and control of forest diseases.关键词
拟双色长喙壳/富士长喙壳/日本落叶松/长白落叶松/弱毒性/诱导抗性Key words
Ophiostoma pseudobicolor/Endoconidiophora fujiensis/Larix kaempferi/Larix olgensis/weak virulence/induced resistance分类
林学引用本文复制引用
王慧敏,刘端冲,李晓菲,刘彩霞,梁玲瑜,吕全..弱毒真菌拟双色长喙壳诱导落叶松对强毒富士长喙壳抗性增强[J].中国森林病虫,2025,44(3):1-8,8.基金项目
国家自然科学基金重点项目"长喙壳真菌激发针叶树两种诱导抗性的生理和分子机制"(32230071) （32230071）
国家自然科学基金青年项目"共生真菌调节云南切梢小蠹信息素合成的作用机制研究"(32201569) （32201569）
