Cracking the elusive alignment hypothesis: the microtubule-cellulose synthase nexus unraveled.

Cracking the elusive alignment hypothesis: the microtubule-cellulose synthase nexus unraveled.
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DOI:
10.1016/j.tplants.2012.06.003
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发表时间:
2012-11
影响因子:
20.5
通讯作者:
Persson, Staffan
Persson, Staffan
中科院分区:
生物学1区
文献类型:
--
作者:
Bringmann, Martin;Landrein, Benoit;Schudoma, Christian;Hamant, Olivier;Hauser, Marie-Theres;Persson, Staffan

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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.
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