Before revision: The microtubule cortical array is a structure consisting of highly aligned microtubules , observed in all growing plant cells, which plays a crucial role in the characteristic plant cell growth by uniaxial expansion along the axis perpendicular to the microtubules.
After revision: The microtubule cortical array is a structure consisting of highly aligned microtubules which plays a crucial role in the characteristic plant cell growth by uniaxial expansion along the axis perpendicular to the microtubules.