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Drivers of xylem cell wall patterns. (a) ROP domains formation in the presence of a primary wall-like microtubule cytoskeleton. Microtubule ends are targeted in the active ROP domains, while microtubules remain unperturbed outside the ROP domains. (b) Active ROP domains are shaped in a microtubule-dependent manner. (c) SCW synthesis machinery (CESA complexes) is recruited. (d) Patterned deposition of SCW material.
