Question

What is the role of the Casparian strip?

Answer 1

Definition:

1. The Casparian strip is a band-like thickening in the center of the root endodermis of vascular plants.

2. The Casparian strip is a water-impermeable sealing that fills the space between cells of the root endodermis.

Role of the Casparian strip:

1. It stops materials that have been moving through the apoplast and forces them to move into the cytosol of the endodermis.

2. It regulates the flow of water between outer tissues and the vascular cylinder at the center of the root.

3. It prevents the backflow of water and nutrients into the soil.