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).
suberized band in the cell wall of endodermis is
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