Answer
Turgor potential also known as pressure potential develop in plant cell when water enter to cell through process of osmosis and vacoul is filled with water which exert pressure on cell wall from inside.
Role of pressure potential
It is one of the most important property of plant cell that help in maintain the proper shape of ell and keep plant straight or rigid. It also help in keeping water body that is required for plant under stress condition. Similarly primary cell wall become enlarge and grow in length due to turgor pressure.
When a cell is plasmolysed mean water move out from cell then it cause welting and bending of plant body. So it is pressure potential that keep away plants from such condition.