First slide

Plant-Water Relations

Question

Choose the correct statement with respect to flaccid cell.

Moderate

A

The water potential of the cell is zero.
B

The osmotic potential of cell is zero.
C

The osmotic potential of the cell is equal to its pressure potential.
D

The osmotic potential of the cell is equal to its water potential.

Solution

A cell is said to flaccid when no pressure is exerted by protoplast on the cell wall. i.e. the pressure potential or turgor pressure is zero and there is no contribution of pressure potential to water potential. Since the cell has certain amount of solute there is negative solute potential which alone contributes to water potential of cell. Hence the water potential of cell is equal to its osmotic potential.

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