A quantification of shoot shedding in pedunculate oak (Quercus robur L.)
A quantification of shoot shedding in pedunculate oak (Quercus robur L.)
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有花梗橡树 (Quercus robur L.) 枝条脱落的量化
DOI：
10.1006/bojl.1997.0166
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发表时间：
1998
影响因子：
2.4
通讯作者：
A. Bell
中科院分区：
文献类型：
--
作者：
G. Buck;A. Bell
近37000碎片（树枝，花序梗，花序）脱落从一个单一的成熟橡树超过一年。脱落表现出较强的季节性，在6月和10月突然达到峰值，但只有弱相关性的天气参数。大部分的棚枝短枝，由一个或几个扩展单元，这是不超过两年。在许多嫩枝中，脱落之前是顶芽向外生长成雄花序或有缺陷的延伸单位。绝大多数棚枝属于夏季一年生和二年生落叶短枝的开发性质，只有少数是探索长枝。树冠结构的含义是，树枝的较高的分支顺序主要受脱落，因为它们由短模块，表现出高比例的花蕾。
Almost 37 000 fragments (twigs, peduncles, inflorescences) were shed from a single mature oak tree over one year. Shedding showed strong seasonality with abrupt peaks in June and October, yet only weak correlations to weather parameters. The majority of shed twigs were short shoots, consisting of one or few extension units, which were not older than two years. In many twigs, shedding was preceded by the outgrowth of the terminal bud into either a male inflorescence or a defective extension unit. The large majority of shed twigs belong to a category of summer annual and biannual deciduous short shoots of an exploitative nature, only a minority are explorative long shoots. Implications for the architecture of the tree crown are that twigs of higher branching order are mostly affected by shedding, as they consist of short modules which exhibit a high proportion of flower buds.