Van Damme Daniel, Vanstraelen Marleen, Geelen Danny
Department of Plant Systems Biology, Flanders Institute for Biotechnology, Technologiepark 927, B-9052 Ghent, Belgium.
Trends Plant Sci. 2007 Oct;12(10):458-64. doi: 10.1016/j.tplants.2007.08.011. Epub 2007 Aug 31.
Plant cell division is spatially organized to maintain a critical cell volume and to control growth directionality. The correct orientation of the separating cell wall is secured by means of specialized cytoskeletal structures that guide the newly formed cell plate toward a predefined cortical position. A ring of microtubules called preprophase band defines a cortical zone that corresponds to the future division plane. Coincident with the disappearance of the preprophase band microtubules, cortical actin is removed at the corresponding position, leaving an actin-depleted zone that persists throughout mitosis. Here, we review the spatial and structural organization of the cortical division zone and discuss evidence that implicate the plasma membrane in division plane establishment.
植物细胞分裂在空间上是有组织的，以维持关键的细胞体积并控制生长方向性。通过专门的细胞骨架结构确保分离细胞壁的正确定向，这些结构将新形成的细胞板导向预定的皮质位置。一个称为前期带的微管环定义了一个与未来分裂平面相对应的皮质区域。与前期带微管消失同时，皮质肌动蛋白在相应位置被去除，留下一个在整个有丝分裂过程中持续存在的肌动蛋白耗尽区。在这里，我们综述了皮质分裂区的空间和结构组织，并讨论了涉及质膜在分裂平面建立中的作用的证据。
