Q. Identify the correct relationship with reference to water potential of a plant cell.
A) $\Psi_{w} = \Psi_{m} + \Psi_{s} + \Psi_{p}$
B) $\Psi_{w} = \Psi_{m} + \Psi_{s} - \Psi_{p}$
C) $\Psi_{w} = \Psi_{m} - \Psi_{s} + \Psi_{p}$
D) $\Psi_{w} = \Psi_{m} - \Psi_{s} - \Psi_{p}$
Explanation
The difference between the free energy of water molecule in pure water and the energy of water in any other system (solution or plant tissue) is termed as water potential. Movement of water occurs from region of higher water potential to lower water potential. $\Psi_{w} = \Psi_{s} + \Psi_{m} + \Psi_{p}$ Where, $\Psi_{w} = water\ potential,\ \Psi_{m} = metric\ potential\$ $\Psi_{s} = solute\ potential\ and\ \Psi_{p} = pressure\ potential$.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.