Question

Differentiate between the following:

(a) Plasmolysis and deplasmolysis

(b) Turgor pressure and wall pressure

(c) Guttation and bleeding

(d) Turgidity and Flaccidity

Answer 1

(a) Plasmolysis
1. Plasmolysis It refers to the shrinkage of the cytoplasm and withdrawal of the plasma membrane from the cell wall caused due to the withdrawal of water when placed in a hypertonic solution.
2. In Plasmolysis, the cell becomes flaccid.

Deplasmolysis
1. Deplasmolysis is the recovery of a plasmolysed cell when it is placed in water, wherein the cell’s protoplasm again swells up due to the re-entry of water.
2. In deplasmolysis, the cell becomes turgid.

(b) Turgor pressure is the pressure of the cell contents on the cell wall.

Wall pressure is the pressure exerted by the cell wall on the cell content.

(c) Guttation is the process by which drops of water appear along leaf margins due to excessive root pressure.

Bleeding is the loss of cell sap through a cut stem.

(d) Turgidity
1. It is the state of a cell in which the cell cannot accommodate any more water and it is fully distended.

Flaccidity
1. It is the condition in which the cell content is shrunken and the cell is not tight.