Cytokinesis in plant male meiosis.
Cytokinesis in plant male meiosis.
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DOI：
10.4161/psb.23394
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发表时间：
2013-03
影响因子：
2.9
通讯作者：
Geelen D
中科院分区：
文献类型：
--
作者：
De Storme N;Geelen D
在体细胞分裂中，胞质分裂是细胞周期的最后一步，并将母细胞质物理地分成两个子细胞。然而，在减数分裂细胞分裂中，花粉母细胞（PMC）经历两次连续的核分裂而没有居间的S期，从而从一个亲本细胞中产生四个单倍体子核。与此一致，减数分裂核的物理分离不遵循常规的胞质分裂途径，而是由替代过程介导，包括基于极性的成膜体生长和RMA介导的细胞壁定位。在这篇综述中，我们概述了不同类型的PMC中细胞板形成的不同细胞学机制，并重点介绍了与雄性减数分裂胞质分裂相关的一些重要特征，包括细胞骨架动力学和胼胝质沉积。我们还提供了一个最新的概述参与PMC壁形成的主要分子演员，并强调了一些最近的进展，冷胁迫对植物减数分裂胞质分裂的影响。
In somatic cell division, cytokinesis is the final step of the cell cycle and physically divides the mother cytoplasm into two daughter cells. In the meiotic cell division, however, pollen mother cells (PMCs) undergo two successive nuclear divisions without an intervening S-phase and consequently generate four haploid daughter nuclei out of one parental cell. In line with this, the physical separation of meiotic nuclei does not follow the conventional cytokinesis pathway, but instead is mediated by alternative processes, including polar-based phragmoplast outgrowth and RMA-mediated cell wall positioning. In this review, we outline the different cytological mechanisms of cell plate formation operating in different types of PMCs and additionally focus on some important features associated with male meiotic cytokinesis, including cytoskeletal dynamics and callose deposition. We also provide an up-to-date overview of the main molecular actors involved in PMC wall formation and additionally highlight some recent advances on the effect of cold stress on meiotic cytokinesis in plants.