Vesicles in guard-cell walls and their possible roles in the stomatal mechanism.
A variety of vesicular inclusions have been observed in guard-cell walls. They have been seen in a number of species and are mostly membrane-bound. They appear confined to the upper and ventral walls of the guard cell. A number of possible origins and functions are discussed. They may be involved in wall deposition or cuticle formation possibly in a role similar to ectodesmata. They also may serve to increase the wall-plasmalemma interface to enhance the movement of ions during the stomatal mechanism.
D002473:Cell Wall / Q000648:ultrastructure; D003593:Cytoplasm / Q000648:ultrastructure; D008854:Microscopy, Electron; D010944:Plants / Q000648:ultrastructure*; D014617:Vacuoles / Q000648:ultrastructure