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Ian M Rimer¹, Scott A M McAdam¹

¹Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN, USA.

American journal of botany

|December 17, 2024

概括

水力细分在干旱期间保护植物,但这项研究没有发现草本物种复合叶中存在这种迹象. 脉,一个小册子结构,并没有防止栓塞扩散.

科学领域:

植物生理学植物生理学
干旱压力反应反应干旱压力反应
液压架构的架构液压架构的架构

背景情况:

在一些树木中,已知存在液压细分,其中脆弱的植物器官保护强壮的植物器官免受干旱引起的栓塞.
叶子内部的液压细分,叶片比树叶更脆弱,已在复合叶树中观察到.
草本复合叶类物种带有pulvini (叶片基) 被假设以防止叶片内栓扩散.

研究的目的:

调查六种草本植物和一棵树种复合叶的叶子中的栓塞抵抗变异.
为了确定复合叶中的pulvini是否会作为阻碍栓塞扩散的障碍.

主要方法:

用于测量栓塞抗性的光学脆弱性方法.
这些物种包括有或没有叶子的手臂状和针状复合叶.
在不同的叶子组织中对栓塞抵抗的比较.

主要成果:

在物种之间发现了对栓塞性耐药性的显著差异,但不是在单个叶子内.
栓塞很容易在两个物种的脉中传播,在类似的水潜力下影响,树和层层.
普尔维尼并没有阻止叶子内的栓塞扩散.

结论:

叶子内部的液压细分不是复合叶物种的普遍特征.
脉的存在并不能防止栓塞在复合叶中传播.
与这些物种的其他叶子结构相比,叶片的栓塞抵抗力并不总是较低.

关键词:

血栓塞栓症血栓塞栓症是一种棕的复合物棕的复合物一个尖的化合物.这就是pulvinus的意思.拉希斯拉希斯是什么意思细分化细分化的细分化在Xylem中,Xylem就是Xylem.

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