Sympodial and monopodial branching in Acer: implications for tree architecture and adaptive significance
Sympodial and monopodial branching in Acer: implications for tree architecture and adaptive significance
复制标题
宏碁的丛轴和单轴分支：对树结构的影响和适应性意义
作者：
S. Sakai
为了了解合轴分枝和单轴分枝的适应性意义，对6个合轴分枝树种和14个单轴分枝树种的幼树顶梢生长模式及其对树木结构的影响进行了研究。所有合生种均表现为主侧枝优势弱，与其发育的主枝成较大的分枝角度(简称SS型)。单足种分为两种类型。一种是ME型，显性强，分枝角小；另一种是MS型，显性中等，分枝角小。计算机模拟结果表明，SS型幼树生长旺盛，水平扩展枝条多，ME型幼树垂直生长量大，MS型幼树生长结构居中。
To understand the adaptive significance of sympodial and monopodial branching in Japanese Acer, growth patterns of leader shoots of vigorous saplings and their consequences for tree architecture were examined in 6 sympodial species (exhibiting sympodial branching) and 14 monopodial species (exhibiting monopodial branching). All sympodial species were characterized by weak dominance of a main lateral branch and its large branching angle with the leader branch it developed (referred to as the SS type). The monopodial species were divided into two types. One, the ME type, was characterized by strong dominance and a small branching angle of a terminal branch, and the other, the MS type, by intermediate dominance and a small branching angle. The computer simulations showed that the growth pattern of the SS type would result in a vigorous sapling with many horizontally spread branches, that of the ME type with a large amount of vertical growth, and that of the MS type with an intermediate architecture between t...