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在热带树苗中以为基础的反草食防御

Marius Klotz^1,2, Jörg Schaller¹, Bettina M J Engelbrecht^2,3

¹Leibniz Centre for Agricultural Landscape Research (ZALF), Müncheberg, Germany.

Frontiers in plant science

|October 30, 2023

概括

(Si) 可以保护热带树木免受昆虫食草的侵害,但这种防御是特定于物种的,并不总是可诱导的. 较高的土壤Si改善了一些物种的防御能力,影响了热带森林的再生.

科学领域:

生态生态学生态生态学
植物科学植物科学
化学生态化学生态学

背景情况:

已知 (Si) 能阻止草中的昆虫食草动物,有时由食草动物诱导的防御.
热带树木积累Si,但其在构成性和诱导性反草食防御中的作用是未知的.
草食对热带树苗的死亡率和利基区分产生重大影响.

研究的目的:

调查是否在热带树种中提供构成性和诱导性草食防御.
确定土壤的可用性和模拟的草食对植物防御的物种特异性影响.

主要方法:

八种热带树种的苗木在不同的土壤度 (-Si/+Si) 和模拟的草食 (-H/+H) 下生长.
模拟的草食包括剪切和甲基斯酸盐的应用.
对一般性毛虫 (Spodoptera frugiperda) 进行了多选择养试验,随后进行了叶子损伤评估.

主要成果:

在高Si条件下,三种物种表现出明显减少的叶子损伤,这表明构成性Si基防御.
对草食动物损害的影响在物种之间有很大差异; 一种物种显示Si.高的损害增加.
模拟的草食并没有始终诱导防御,并且在某些情况下,增加了损伤或降低了Si度.

结论:

构成性基防御存在于一些热带树种中,其有效性因物种和土壤Si水平而异.
热带树木的基于的防御系统似乎在很大程度上无法被草食诱导.
特定物种的基于Si的防御和土壤Si的可用性可以显著影响热带树木的再生和性能.

关键词:

草食动物草食动物跨物种变化的跨物种变化.植物的植物石.工厂防御系统的工厂防御系统石是什么意思? 石是什么意思?

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