<P> In plant anatomy, the Casparian strip is a band of cell wall material deposited in the radial and transverse walls of the endodermis, and is chemically different from the rest of the cell wall - the cell wall being made of lignin and without suberin - whereas the Casparian strip is made of suberin and sometimes lignin . The Casparian strip might be viewed rather like mortar in a wall that blocks the passive flow of materials such as water and solutes . Water and solutes are pumped into the stele through special endodermal cells called passage cells . The Casparian strip prevents those from leaking back out to the cortex . The band was first recognized as a wall structure by Robert Caspary (1818--1887). </P> <P> The strip forms during the early development of the cell and is a part of the primary wall of the cell of the endodermis . It varies in thickness and is often much thinner than the wall in which it occurs . It is typically located closer to the inner tangential wall than to the outer wall . </P>

Suberized band in the cell wall of endodermis is