University of Osnabrück, Botany Institute, Germany.
Center for Plant Molecular Biology, University of Tübingen, Germany.
Curr Opin Plant Biol. 2019 Dec;52:97-105. doi: 10.1016/j.pbi.2019.07.003. Epub 2019 Sep 19.
Many decisions made during plant development depend on the placement of the cytokinetic wall. Cytokinesis involves the biogenesis of the cell plate that progresses centrifugally and until the fusion of the cell plate with the parental cell wall. The phragmoplast facilitates the growth of the cell plate and directs it's insertion at the cell cortex by a mechanism known as phragmoplast guidance. Communication between the phragmoplast and its destination, the cortical division zone, however, is not well understood. The preprophase band predicts the site of cell plate fusion, seemingly controlling the site of the cortical division zone establishment, but recent results suggest the role of this cytoskeletal array to be rather subtle. This is indirectly supported by certain types of phragmoplast-driven cell division in mosses and algae, which lack preprophase bands. In this review article, we summarize recent insight concerning phragmoplast expansion and guidance.
许多植物发育过程中的决策取决于细胞分裂壁的位置。细胞分裂涉及细胞板的生物发生，其向心推进，直到细胞板与亲代细胞壁融合。有丝分裂纺锤体通过一种称为有丝分裂纺锤体导向的机制促进细胞板的生长，并指导其在细胞皮层处插入。然而，有丝分裂纺锤体与其目标——皮层分裂区之间的通讯尚不清楚。前期带预测细胞板融合的位点，似乎控制着皮层分裂区建立的位点，但最近的结果表明，这种细胞骨架阵列的作用相当微妙。这一点间接得到了某些类型的苔藓和藻类中无前期带的有丝分裂纺锤体驱动的细胞分裂的支持。在这篇综述文章中，我们总结了最近关于有丝分裂纺锤体扩展和导向的研究进展。
