VESSEL OCCLUSIONS IN PLANTS - MORPHOLOGICAL, FUNCTIONAL AND EVOLUTIONARY ASPECTS
VESSEL OCCLUSIONS IN PLANTS - MORPHOLOGICAL, FUNCTIONAL AND EVOLUTIONARY ASPECTS
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DOI：
10.1163/22941932-90000528
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发表时间：
1990-01-01
期刊：
影响因子：
--
通讯作者：
KUCERA, LJ
中科院分区：
文献类型：
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作者：
BONSEN, KJM;KUCERA, LJ
导管薄壁组织纹孔对的最小纹孔孔径直径被发现是决定性的木材解剖特征，用于导管被木质素或树胶堵塞。 基于这一观察，以及考虑和建立知识的功能意义的血管闭塞，一个进化的假说。 为了抵抗微生物和栓塞，植物能够用纤维素或树胶堵塞它们的血管。 最原始的被子植物有侵殖体形成。 在植物进化过程中，随着导管壁中孔的减小，树胶的形成得以发展，而导管尺寸的增大则导致某些植物更新的侵填体的形成。
The minimum pit aperture diameter of a vessel-parenchyma pit pair was found as the decisive wood anatomical feature for vessel occlusion by either tyloses or gums. Based on this observation, as well as on considerations and established knowledge about the functional significance of vessel occlusions, an evolutionary hypothesis is presented. In order to withstand microorganisms and embolisms, plants are able to occlude their vessels with tyloses or gums. The most primitive Angiosperms show tylosis formation. With the decreasing pit sizes in the vessel wall during plant evolution, gum formation was developed, whereas the increasing vessel sizes led in some plants to renewed tylosis formation.