Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; PRESTO, Japan Science and Technology Agency (JST), 4-1-8, Honcho, Kawaguchi, Saitama 332-0012, Japan.
Curr Opin Plant Biol. 2013 Dec;16(6):743-8. doi: 10.1016/j.pbi.2013.10.010. Epub 2013 Nov 7.
Proper patterning of cellulosic cell walls is critical for cell shaping and differentiation of plant cells. Cortical microtubule arrays regulate the deposition patterns of cellulose microfibrils by controlling the targeting and trajectory of cellulose synthase complexes. Although some microtubule-associated proteins (MAPs) regulate the arrangement of cortical microtubules, knowledge about the overall mechanism governing the spacing of cortical microtubules is still limited. Recent studies reveal that ROP GTPases and MAPs spatially regulate the assembly and disassembly of cortical microtubules in developing xylem cells, in which localized secondary cell walls are deposited. Here, we review recent insights into the regulation of xylem cell wall patterning by cortical microtubules, ROP GTPases, and MAPs.
细胞纤维素壁的正确模式对于植物细胞的形状和分化至关重要。皮层微管阵列通过控制纤维素合酶复合物的靶向和轨迹来调节纤维素微纤维的沉积模式。尽管一些微管相关蛋白 (MAPs) 调节皮层微管的排列，但关于控制皮层微管间距的整体机制的知识仍然有限。最近的研究表明，ROP GTPases 和 MAPs 在木质部细胞的发育过程中空间调节皮层微管的组装和拆卸，其中局部沉积次生细胞壁。在这里，我们回顾了皮层微管、ROP GTPases 和 MAPs 对木质部细胞壁模式形成的调控的最新见解。
