Shoot morphology and fate of buds in relation to crown location in young Fraxinus pennsylvanica var. subintegerrima
Shoot morphology and fate of buds in relation to crown location in young Fraxinus pennsylvanica var. subintegerrima
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年轻的宾夕法尼亚白蜡树芽的形态和芽的命运与树冠位置的关系。
作者：
W. Remphrey;G. A. Bartlett;C. G. Davidson
以 6 年生绿梣 (Fraxinus pennsylvanica var. subintegerrima (Vahl) Fern.) 为对象，研究了枝条大小、形态模式和树冠位置之间的关系。一般来说，与顶部或底部附近的周边相比，树冠内部的芽较短。这些差异与同色异构体数量和长度的减少有关。在某些情况下，下冠位置与上冠位置相似；在其他情况下，它与内部类似。沿着枝条的芽的命运通常取决于枝条在树冠中的位置。与树冠底部相比，顶部的侧芽和花序的比例更大，向内部位置发育的芽最少。随着每个枝条同色异体数量的增加，产生侧枝的比例增加，花序和（或）败育芽的比例减少。对于每个芽具有相同数量的同色异体的芽，那些处于顶级产品中的芽......
The relationships between shoot size and morphological patterns and crown location were investigated in 6-year-old green ash (Fraxinus pennsylvanica var. subintegerrima (Vahl) Fern.). In general, shoots were shorter in the inner part of the crown compared with either the top or bottom near the periphery. The differences were related to a reduction in both metamer number and length. In some cases the lower crown location was similar to the upper; in other cases it was similar to the inside. The fate of buds along a shoot was generally dependent on shoot position in the crown. A greater proportion of buds became lateral shoots and inflorescences in the top compared with the bottom of the crown, and the fewest developed towards the inside location. As the number of metamers per shoot increased, there was an increase in the proportion of lateral shoots produced and a decrease in the proportion of inflorescences and (or) aborted buds. For shoots with the same number of metamers per shoot, those in the top prod...