Tension wood in aerial roots of ficus benjamina L.
Tension wood in aerial roots of ficus benjamina L.
复制标题
Ficus benjamina L 气生根中的张力木。
DOI：
10.1007/bf00394958
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发表时间：
1968
影响因子：
3.4
通讯作者：
P. Tomlinson
中科院分区：
文献类型：
--
作者：
M. Zimmermann;A. Wardrop;P. Tomlinson
Ficus benjaminaL. produces aerial roots from branches. Once anchored in the ground the roots begin secondary growth. They produce tension wood until they have reached a diameter of 4 ... 10 sometimes up to 15 millimeters. From then on normal wood is formed. Roots contract considerably while they are producing tension wood. This can be shown by planting roots in a pot during the free hanging stage. During subsequent contraction they can lift the pot from the ground. Polarizing microscopy, electron microscopy, andx-ray diffraction analysis all indicate that the tension wood of aerial roots is identical in fine structure with tension wood in the upper side of the branches. The fibres of the tension wood possess a very thick unlignified S 2 (G) layer in which the cellulose molecules are arranged almost axially and show a high degree of crystallinity. Preliminary experiments in which auxin paste was applied to taut roots had but a local effect and did not suggest that there was a simple relation between auxin concentration and tension-wood formation.
