Question

what is the function of endodermis in the root

Answer 1

The endodermis is a plant tissue that surrounds the root's vascular tissue (the xylem and phloem). Its function is to regulate the movement of water, ions, and other substances from the soil into the plant's root and up to the rest of the plant. The endodermis achieves this by containing a waxy substance called suberin in its cell walls, which forms an impermeable barrier around each cell. This barrier forces all water and substances to be filtered through the selectively permeable plasma membranes of the endodermal cells to reach the rest of the plant, allowing the endodermis to act as a gatekeeper for the plant's nutrient uptake.