The Impact of Microfibril Orientations on the Biomechanics of Plant Cell Walls and Tissues.
The Impact of Microfibril Orientations on the Biomechanics of Plant Cell Walls and Tissues.
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DOI：
10.1007/s11538-016-0207-8
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发表时间：
2016-11
影响因子：
3.5
通讯作者：
Seguin, Brian
中科院分区：
文献类型：
--
作者：
Ptashnyk, Mariya;Seguin, Brian
植物细胞壁的微观结构和各向异性极大地影响着植物细胞和组织的力学性能、形态建成和生长。细胞壁的微观结构和性质取决于纤维素微纤丝的取向和力学性质以及细胞壁基质的力学性质。将植物细胞的形状视为具有与扩展和生长的主要方向对齐的轴的正方形棱柱，侧壁内的微纤丝的取向，即细胞壁在细胞侧面上的部分，是已知的。然而，关于它们在细胞上端和下端的方向知之甚少。在这里，我们调查的纤维素微纤丝的取向内的上部和下部的植物细胞壁的线弹性方程数值求解的影响。三种不同的方案被认为是微纤维的取向。我们还区分由垂直于膨胀的主方向的微纤丝给出的侧壁中的微观结构和微纤丝旋转通过壁厚的情况。利用均匀化理论，从细胞壁微纤丝和细胞壁基质的弹性性质的微观描述中获得细胞壁的宏观弹性性质。据发现，在细胞壁的上部和下部中的微纤丝的取向影响细胞在横向方向上的膨胀，并且在力作用于植物细胞壁和组织的情况下特别重要。
The microscopic structure and anisotropy of plant cell walls greatly influence the mechanical properties, morphogenesis, and growth of plant cells and tissues. The microscopic structure and properties of cell walls are determined by the orientation and mechanical properties of the cellulose microfibrils and the mechanical properties of the cell wall matrix. Viewing the shape of a plant cell as a square prism with the axis aligning with the primary direction of expansion and growth, the orientation of the microfibrils within the side walls, i.e. the parts of the cell walls on the sides of the cells, is known. However, not much is known about their orientation at the upper and lower ends of the cell. Here we investigate the impact of the orientation of cellulose microfibrils within the upper and lower parts of the plant cell walls by solving the equations of linear elasticity numerically. Three different scenarios for the orientation of the microfibrils are considered. We also distinguish between the microstructure in the side walls given by microfibrils perpendicular to the main direction of the expansion and the situation where the microfibrils are rotated through the wall thickness. The macroscopic elastic properties of the cell wall are obtained using homogenization theory from the microscopic description of the elastic properties of the cell wall microfibrils and wall matrix. It is found that the orientation of the microfibrils in the upper and lower parts of the cell walls affects the expansion of the cell in the lateral directions and is particularly important in the case of forces acting on plant cell walls and tissues.
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影响因子：
2
作者：
Dyson, R. J.;Band, L. R.;Jensen, O. E.
通讯作者：
Jensen, O. E.
影响因子：
3.7
作者：
Dyson, R. J.;Jensen, O. E.
通讯作者：
Jensen, O. E.
DOI：
10.1083/jcb.17.1.105
发表时间：
1963-04
期刊：
The Journal of cell biology
影响因子：
--
作者：
COLVIN JR
通讯作者：
COLVIN JR
影响因子：
6.9
作者：
HEJNOWICZ, Z;SIEVERS, A
通讯作者：
SIEVERS, A
影响因子：
--
作者：
Nakamura, K;Wada, M;Okano, T
通讯作者：
Okano, T