Vacuoles are the membrane bound structure found in the plant including algae and in some fungi that function to provide structural support and also serve as a site for storage, and waste disposal for the plant.
They do not have a fixed size or shape, plant cell can changed them according to their need.
It tend to be the largest organelle of the plant cell. It also function to maintain the internal pressure required withing the plant cell to provide structure and support to the growing part of the plant.
