2.1.3 The concept of water potential provides a thermodynamic basis for the study of water movement Equation 2. 1.3 ●V=Vb+。+vg+V ● w water potentia ppressure potential o Vs: solute(osmotic) potential Vg: gravitational potential Vm: matrix potential2.1.3 The concept of water potential provides a thermodynamic basis for the study of water movement. ⚫ Equation 2.1.3 ⚫ ψw=ψp+ψs+ψg+ψm ⚫ ψw :water potential ⚫ Ψp : pressure potential ⚫ ψs : solute (osmotic) potential ⚫ ψg : gravitational potential ⚫ ψm: matrix potential