Large centrally located vacuole is the characteristic feature of a plant cell. It is a single membrane bound sac like structure that provide structural support to the cell. It also controls turgor pressure. It stores water inside that keeps the plant to stand still. When the plant is fully hydrated, the central vacuole is filled with water and the membrane of the vacuole pushes against the cell wall. this increases the turgor pressure inside the plant cell and the plant cell stands stiff in an upright position.
