Casparian strip

…and corky band, called the casparian strip, around all the cell walls except those facing toward the axis and the surface of the root or stem. The endodermis with its casparian strips may function in regulating the flow of water between outer tissues and the vascular cylinder at the centre…

…into roots is the so-called Casparian strip, a conspicuously thickened wall area one cell layer deep surrounding primary roots; it prevents excess soil solution from being pulled directly into the central part of the root where the xylem is located. As a result, the soil solution has to pass through…

…that have within their walls Casparian strips, water-impermeable deposits of suberin that regulate water and mineral uptake by the roots. The cortex is surrounded by the dermal system consisting of a single layer of epidermal cells.