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首页> 外文会议>International Wood Biotechnology Symposium (IWBS) Mar 14-17, 2001, Narita, Chiba, Japan >THE ROLE OF CORTICAL MICROTUBULES IN WOOD FORMATION
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THE ROLE OF CORTICAL MICROTUBULES IN WOOD FORMATION

机译：皮质微管在木材形成中的作用

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摘要

During differentiation of cambial cells into secondary xylem cells in trees (wood formation), newly deposited cellulose microfibrils on the innermost surface of cell walls change their orientation progressively. The orientation of cellulose microfibrils in the secondary wall, referred to as the microfibril angle, is one of the most important characteristics that determine the properties of wood. In particular, the angle in the thickest middle layer (S_2 layer) of secondary wall is closely related to mechanical properties. Therefore, the control of orientation of cellulose microfibrils allows us to change the quality of wood and its products. Recent observations in a wide variety of trees have revealed that there is a close relationship between the orientation of cortical microtubules, which are one component of cytoskeleton, and the orientation of newly deposited cellulose microfibrils in differentiating secondary xylem cells. Such a close relationship has been found in both normal, compression wood and tension wood. These evidences indicate that cortical microtubules play an important role in the control of the orientation of cellulose microfibrils in secondary xylem cells. Therefore, biotechnological control of the orientation of cellulose microfibrils in the cell walls by manipulation of cortical microtubules provides new tools to improve the quality of wood and its products.
机译：在树木中将冈比亚细胞分化为次生木质部细胞期间（木材形成），细胞壁最内表面上新沉积的纤维素微纤维逐渐改变其方向。纤维素微纤维在次生壁中的取向（称为微纤维角）是决定木材性能的最重要特征之一。特别地，次壁的最厚中间层（S_2层）中的角度与机械性能密切相关。因此，对纤维素微纤维取向的控制使我们能够改变木材及其产品的质量。最近在各种各样的树木中观察到的结果表明，作为细胞骨架的一个组成部分的皮质微管的方向与分化中的次生木质部细胞中新沉积的纤维素微纤维的方向之间存在密切的关系。在普通的压缩木和拉伸木中都发现了这种紧密的关系。这些证据表明皮质微管在控制次生木质部细胞中纤维素微纤维的取向中起重要作用。因此，通过操纵皮质微管对细胞壁中纤维素微纤维取向的生物技术控制提供了改善木材及其产品质量的新工具。

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