Question

What are casparian strips?

Answer 1

Casparian strips:

1. The Casparian strip is a band of suberin, an impermeable substance, found in the endodermal cell dividers of plant roots.
2. The development of water through the apoplast pathway is redirected from the cell divider to the cytoplasm.
3. From that point, it follows the symplast pathway. The endodermal cells effectively emit salts into the vascular tissue.
4. This results in low water potential, permitting water to drop down a water expected slope from the endodermis into the vascular tissue.
5. The Casparian strip keeps water from getting back to the cortex; subsequently, a positive hydrostatic strain is laid out in the vascular tissue - the peculiarity of root pressure.