Patterns of vegetative growth and reproduction in relation to branch orders: the plant as a spatially structured population
Patterns of vegetative growth and reproduction in relation to branch orders: the plant as a spatially structured population
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与分枝目相关的营养生长和繁殖模式：植物作为空间结构的种群
DOI：
10.1007/s004680050226
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
A. Suzuki
中科院分区：
文献类型：
--
作者：
A. Suzuki
摘要研究了万年青木本植物日本木（Eurya japonica）营养生长和生殖方式与顶生枝序的关系。 离心法测定分支级数。树干为第1级;直接从树干发出的分支为第2级;按第2级生长的分支为第3级，以此类推。本研究结果显示了与分支级相关的营养生长和繁殖的差异模式。顶生枝的低位芽生长较多，但开花较少。另一方面，对于高阶顶生枝，新梢生长非常有限，但开花更强烈。结果表明，一棵树可以被解释为不仅仅是一个人口的等效模块，但作为一个空间结构的人口。因此，在研究营养生长和繁殖模式时，必须考虑构件在分支系统中的位置。本文认为，不同分支序的机会成本差异是造成植物生长和繁殖空间结构的主要原因。此外，对于同阶顶生枝，当年枝伸长与开花强度无关。这些结果表明，该物种只投资资源在繁殖是盈余的需求与生存相关的功能，如增长和/或存储。
Abstract The patterns of vegetative growth and reproduction in relation to orders of terminal branches were examined in the evergreen woody plant, Eurya japonica. The branch order number was determined centrifugally. The trunk was given order number 1; branches issuing directly from the trunk were order 2; branches growing on order 2 branches were order 3, and so on. The results of this study show the differential patterns of vegetative growth and reproduction in relation to the branch orders. Lower-order shoots of terminal branches grew more, but produced few flowers. On the other hand, for the higher-order terminal branches, shoot growth was very limited but flowering was more intense. The results show that a tree can be interpreted not as a mere population of equivalent modules but as a spatially structured population. Thus, it is essential to consider the position of modules within the branch system when patterns of vegetative growth and reproduction are examined. It is hypothesized that the difference in the opportunity cost in relation to the branch orders is the main cause of the spatial structure for patterns of vegetative growth and reproduction. Furthermore, for same-order terminal branches, current-year shoot elongation was independent of flowering intensity. These results suggest that this species only invests resources in reproduction that are surplus to its requirements for the functions associated with survival, such as growth and/or storage.