Given diagram illustrates the changes that occur when a plant cell takes up water Identify `L,M`and `N` and select the incorrect statement the given diagram

Options

A. `N` is the diffusion pressure deficit which becomes zero when `L`and`M` re equal in magnitude.
B. In a flaccid cell value of `N` becomes equal to that of `L`
C. `M`represents osmotic pressure which increases when a flaccid cell takes up water.
D. `L` represents solute potential which decreases with the increase in turgidity of the cell .

Answer

C

Explanation

Given diagram illustrates the changes that occur when a flaccid plant cell takes up water. `L`represnets osmotic pressure `(OP)` or solute potential `(Psi_(s))`, M represents turgor pressure `(TP)` or pressure potential `(Psi_(rho))` and `N` represents diffusion pressure deficit `(DPD)` or water potential `(Psi_(w))`.
In a flaccid cell, `TP` is zero, therefore, `DPD = OP-0=OP.` When a flaccid cell is placed in water it takes up water due to endosmosis `OP` of the cell starts decreasing while `TP` starts increasing. In fully turgid condition `OP` and `TP` become equal so that `DPD` becomes zero.