The Tangled1 gene is required for spatial control of cytoskeletal arrays associated with cell division during maize leaf development
The Tangled1 gene is required for spatial control of cytoskeletal arrays associated with cell division during maize leaf development
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DOI：
10.1105/tpc.10.11.1875
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发表时间：
1998-11-01
期刊：
影响因子：
11.6
通讯作者：
Smith, LG
中科院分区：
文献类型：
--
作者：
Cleary, AL;Smith, LG
细胞骨架在植物细胞分裂和形态发生的空间调控中起着重要作用。前期细胞皮层中存在的微管和肌动蛋白丝阵列标记了胞质体和相关细胞板在胞质分裂过程中被引导的位点。在间期期间，皮质微管被认为通过引导细胞壁材料的铺设模式来影响细胞扩张的方向。人们对调节这些对植物发育至关重要的细胞骨架依赖性过程的机制知之甚少。先前的研究表明，玉米的 Tangled1 (Tan 1) 基因是玉米叶片发育过程中胞质分裂空间调控所必需的，但对于叶片形态发生却不是必需的。在这里，我们检查了 tan1 和野生型叶子发育过程中与细胞分裂和形态发生相关的细胞骨架阵列。我们的分析得出这样的结论：Tan1 对于在前期建立细胞分裂平面的细胞骨架阵列的定位以及在胞质分裂过程中向预先建立的皮质分裂位点扩展成膜体的空间引导都需要 Tan1。对间期皮层微管组织的观察表明，区域影响可能在叶形态发生过程中协调细胞群之间的细胞扩张模式中发挥作用。
The cytoskeleton plays a major role in the spatial regulation of plant cell division and morphogenesis. Arrays of microtubules and actin filaments present in the cell cortex during prophase mark sites to which phragmoplasts and associated cell plates are guided during cytokinesis. During interphase, cortical microtubules are believed to influence the orientation of cell expansion by guiding the pattern in which cell wall material is laid down. Little is known about the mechanisms that regulate these cytoskeleton-dependent processes critical for plant development. Previous work showed that the Tangled1 (Tan 1) gene of maize is required for spatial regulation of cytokinesis during maize leaf development but not for leaf morphogenesis. Here, we examine the cytoskeletal arrays associated with cell division and morphogenesis during the development of tan1 and wild-type leaves. Our analysis leads to the conclusion that Tan1 is required both for the positioning of cytoskeletal arrays that establish planes of cell division during prophase and for spatial guidance of expanding phragmoplasts toward preestablished cortical division sites during cytokinesis. Observations on the organization of interphase cortical microtubules suggest that regional influences may play a role in coordinating cell expansion patterns among groups of cells during leaf morphogenesis.