Write a note on solute potneital.

Explanation

1. Solute Potential `(Psi_(S))`: Solute potential, otherwise known as osmotic potential denotes the effect of dissolved solute on water potential. In pure water, the addition of solute reduces its free energy and lowers the water potential value from zero to negative . Thus the value of solute potential is always negative. In a solution at standard atmospheric pressure, water potential is always equal to solute potential `(Psi_(W)=Psi_(S))`.
2. Pressure Potential `(Psi_(P))`: Pressure potential is a mechanical force work potential and water enters cell and cells become turgid. This positive hydrostatic pressure within the cell is called Turgor pressure. Likewise, withdrawal of water from the the cell decreases the water potential and the cell becomes flaccid.