增加的营养供应可以对挪威杉树产生比干旱更严重的影响,通过化学防御对针生的影响来看
Andrea Ganthaler1, Andreas Guggenberger1, Wolfgang Stöggl1
1Department of Botany, Universität Innsbruck, Sternwartestrasse 15, Innsbruck A-6020, Austria.
Tree physiology
|July 5, 2023
概括
施肥通过改变化合物,增加易感性,损害了挪威杉木对针生的防御能力. 干旱的影响很小,这表明施肥可能对森林健康不利.
科学领域:
- 植物病理学 植物病理学
- 森林生态 森林生态
- 植物生物化学 植物生物化学
背景情况:
- 像水和营养素这样的非生物因素会影响植物对病原体的易感性.
- 化合物对植物防御至关重要,特别是在针叶树中.
- 挪威杉 (Picea abies) 容易受到由Chrysomyxa rhododendri引起的针生.
研究的目的:
- 为了研究水的限制和营养供应如何影响挪威杉的化合物.
- 为了确定这些非生物因素对 Chrysomyxa rhododendri 针生易感性的影响.
- 阐明植物防御机制中烯样的作用.
主要方法:
- 挪威杉树苗在两年内受到水的限制和营养供应的增加.
- 进行了用Chrysomyxa rhododendri进行的受控注射.
- 分析了针头中的构成性和诱导性化合物度.
- 量化了针生感染的程度.
主要成果:
- 干旱和受精都显著改变了构成和诱导的形状,但不是总含量.
- 受精主要影响了可诱导的反应,导致C. rhododendri感染率增加.
- 干旱压力主要影响健康组织中的样,但对整体敏感性没有显著影响.
- 由于营养补充而引起的性反应受损对于感染成功至关重要.
结论:
- 单个化合物中的特定变化,而不是总含量,是C. rhododendri感染成功的关键.
- 在高病原体压力地区,受精可能会产生反作用,因为它会损害挪威杉的诱导防御.
- 未来的长期干旱可能不会显著地改变挪威杉叶的防御,防止这种针生,但施肥对森林生产力构成风险.
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