处于危险中的松树:不同病原菌感染如何影响松树的化学防御 Lodgepole Pine
Rashaduz Zaman1, Federico Antonioli2, Ateeq Shah2
1Department of Renewable Resources, University of Alberta, Edmonton, AB, T6G 2E3, Canada. rashaduz@ualberta.ca.
Microbial ecology
|July 24, 2023
概括
不同的真菌感染会以独特的方式影响木松防御化学. 了解这些特定的生物应激效应对于预测树木对山松甲虫等昆虫食草动物的耐药性至关重要.
科学领域:
- 森林病理学 森林病理学
- 树木化学生态学 化学生态学
- 昆虫-微生物-植物相互作用
背景情况:
- 北美的松 (Pinus contorta) 面临着许多生物威胁.
- 菌感染可能会损害树木对随后的昆虫食草动物攻击的防御能力.
- 树木化学中的特定病原体诱导的变化尚未完全理解.
研究的目的:
- 为了研究不同的致病性真菌物种如何影响木松防御化学.
- 为了比较松对不同真菌病原体和共生体的化学反应.
主要方法:
- 研究了Atropellis canker (Atropellis piniphila) 和西部胆汁生 (Endocronartium harknessii) 在成熟的树木松树中的自然感染.
- 接种了三种与山松甲虫相关的三种ophiostomatoid真菌 (Grosmannia clavigera,Ophiostoma montium,Leptographium longiclavatum) 的成年松树.
- 收集并分析体样本,以确定感染/注射后的体化学变化.
主要成果:
- 不同的真菌物种诱导了木松化学物质的明显变化.
- 内分冠状动脉 (endocronartium harknessii) 和状菌类 (ophiostomatoid fungi) 引起了类似的化学防御模式.
- 与其他真菌相比,Atropellis piniphila感染导致了独特的化学防御反应.
结论:
- 菌类病原体的身份显著影响宿主树的化学防御策略.
- 主体树的反应因遇到的特定生物应激剂而异.
- 考虑特定的真菌病原体对于了解松对昆虫食草动物的敏感性至关重要,包括山松甲虫.
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