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首页> 外文期刊>Trends in Plant Science >Cracking the elusive alignment hypothesis: the microtubule-cellulose synthase nexus unraveled
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Cracking the elusive alignment hypothesis: the microtubule-cellulose synthase nexus unraveled

机译:打破难以捉摸的对齐假说:微管纤维素合酶联系被揭开

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摘要

Directed plant cell growth is governed by deposition and alterations of cell wall components under turgor pressure. A key regulatory element of anisotropic growth, and hence cell shape, is the directional deposition of cellulose microfibrils. The microfibrils are synthesized by plasma membrane-located cellulose synthase complexes that co-align with and move along cortical microtubules. That the parallel relation between cortical microtubules and extracellular microfibrils is causal has been named the alignment hypothesis. Three recent studies revealed that the previously identified pom2 mutant codes for a large cellulose synthases interacting (CSI1) protein which also binds cortical microtubules. This review summarizes these findings, provides structure–function models and discusses the inferred mechanisms in the context of plant growth.
机译:定向植物细胞的生长受到在压力下细胞壁成分的沉积和改变的控制。各向异性生长以及因此细胞形状的关键调控因素是纤维素微纤维的定向沉积。微纤维是由与皮质微管共排列并沿着皮质微管移动的质膜定位的纤维素合酶复合物合成的。皮层微管和细胞外微纤维之间的平行关系是因果关系,因此被称为比对假说。最近的三项研究表明,先前鉴定的pom2突变体编码大纤维素合成酶相互作用(CSI1)蛋白,该蛋白也结合皮层微管。这篇综述总结了这些发现,提供了结构-功能模型并讨论了植物生长过程中的推断机制。

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