Water potential is equal to (a) Ys + O.P. (b) Ys = T.P. (c) Yp + Yw (d) Ys + Yp .
Option D Water potential is the difference in the free energy or chemical potential per unit molal volume of water in a system and that of pure water at the same temperature and pressure. Water potential is represented by Greek letter y (psi) or yw . Water potential is the sum total of ys and yp . Therefore, yw s p = y + y .
