Cell wall anisotropy plays a key role in Zea mays stomatal complex movement: the possible role of the cell wall matrix.

ABSTRACT: The opening of the stomatal pore in Zea mays is accomplished by the lateral displacement of the central canals of the dumbbell-shaped guard cells (GCs) towards their adjacent deflating subsidiary cells that retreat locally. During this process, the central canals swell, and their cell wall thickenings become thinner. The mechanical forces driving the outward displacement of the central canal are applied by the asymmetrically swollen bulbous ends of the GCs via the rigid terminal cell wall thickenings of the central canal and the polar ventral cell wall (VW) ends. During stomatal pore closure, the shrinking bulbous GC ends no longer exert the mechanical forces on the central canals, allowing them to be pushed back inwards, towards their initial position, by the now swelling subsidiary cells

SUBMITTER: Gkolemis K 

PROVIDER: S-EPMC10730690 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature