在皮质阵列组织中,细胞几何,微管曲和取决于方向的动态不稳定性在细胞几何,微管曲和方向依赖的动态不稳定性的相互冲突
Tim Y Y Tian1, Geoffrey O Wasteneys2, Colin B Macdonald1
1Department of Mathematics, The University of British Columbia, Vancouver V6T 1Z2, BC, Canada.
概括
植物细胞微管组织受到细胞几何学的影响. 模型显示细胞曲率可以破坏微管 (MT) 阵列,但定和阻抗可以恢复横向组织.
科学领域:
- 植物细胞生物学 植物细胞生物学
- 生物物理学的生物物理.
- 数学建模的数学建模
背景情况:
- 皮层微管 (MT) 阵列对于植物细胞壁合成,细胞形状和整体植物结构至关重要.
- MT阵列的自我组织是植物细胞中一个关键的新兴现象.
- 几何线索,如细胞形状和膜张力,影响MT阵列的方向.
研究的目的:
- 为了研究膜曲率对皮质MTs的机械影响.
- 模拟MTs在曲细胞环境中的相互作用.
- 为了确定单独的细胞几何学是否会阻碍强大的MT组织.
主要方法:
- 将以前的MT定和偏移模型纳入了交互MT的模型.
- 在不同曲率的圆柱形细胞内模拟MT组织.
- 引入了取决于方向的灾难率,以模拟纤维素微纤维素阻抗.
主要成果:
- 细胞曲率显著影响MT阵列的方向,有利于平行对齐而不是预期的横向方向.
- 大细胞的几何结构本身就阻碍了强大的MT组织.
- MT定和阻抗的组合足以产生横向阵列,克服几何约束.
结论:
- 膜曲率是MT组织的一个重要因素,可能会超越预期的模式.
- 额外的机制,如取决于方向的灾难率,是必要的,以确保在更大或更曲的细胞中强大的MT组织.
- 细胞几何,MT定和聚合动态之间的相互作用对于建立植物细胞结构至关重要.
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