Vegetative architecture of Elaeocarpus hookerianus. Transition from juvenile to adult
Vegetative architecture of Elaeocarpus hookerianus. Transition from juvenile to adult
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DOI：
10.1006/anbo.1996.0369
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发表时间：
1997-06-01
期刊：
影响因子：
4.2
通讯作者：
Jameson, PE
中科院分区：
文献类型：
--
作者：
Day, JS;Gould, KS;Jameson, PE
Elaeocarpus hookerianus Raoul是一种原产于新西兰的异母树。我们描述和量化的变化在叶片形态和解剖结构和分支模式在不同的插入水平。离散的青少年，青少年和成年阶段被确定。分化的幼体叶片小，叶面薄，解剖结构为典型的遮荫植物。幼枝冠层浓密，横轴和纵轴细，枝角宽，枝型多变。青少年有较大的叶片，较少的水平轴在一个单一的，领先的垂直轴，和更一致的分支模式。成虫为乔木，在最粗、最长的水平枝上产生最大、分化最多的叶片。数据表明有三个阶段的战略：(a)在弱光条件下提供反应灵敏、节能的射击系统；(b)迅速生长到森林冠层；(c)森林冠层环境的开发利用。(C) 1997年植物学年鉴。
Elaeocarpus hookerianus Raoul is a profoundly heteroblastic tree native to New Zealand. We describe and quantify changes in leaf morphology and anatomy and in branching pattern at different levels of insertion. Discrete juvenile, adolescent and adult phases were identified. The divaricating juvenile bore small leaves with thin laminae and an anatomy typical of shade-plants. Juveniles had dense canopies, many thin horizontal and vertical axes, wide branch angles and highly variable branching patterns. Adolescents had larger leaves, fewer horizontal axes on a single, leading vertical axis, and a more consistent branching pattern. Adults were arborescent, producing the largest, most differentiated leaves on the stoutest and longest horizontal branches. Data indicate a three-phased strategy for: (a) providing responsive, energy-efficient shoot systems under low-light regimes; (b) growing rapidly to the forest canopy; and (c) exploiting for the forest canopy environment. (C) 1997 Annals of Botany Company.