Question

Give the location of the casparian strip and explain its role in the water movement.

Answer 1

Location of casparian strip:

The endodermal cells that form the inner boundary of the cortex contain suberin in their cell walls. The suberin forms a continuous layer called Casparian strips.





Role of casparian strip:


The casparian strip does not allow the water to penetrate it as the suberin is impermeable to water. As a result the water moves through the symplastic pathway that is through the plasmodesmata of the cells to reach the cells of the xylem.