A portion of transverse section of root is shown in the diagram

cbse
transport-in-plants

#1

A portion of transverse section of root is shown in the diagram. Label 1 to 5 and also write the function of parts 2 and 3. Briefly explain the symplast pathway.


#2

Labelling of the parts/ pathways
Parts : 1 Root hair, 2 Endodermis 3 Casparian strip, 4 Apoplastic path and 5 Vacuole
Functions of parts 2 and 3
2. Endodermis It is a special layer of living cells that enclose the vascular cylinder of the root. The major function of endodermis in roots is to prevent the loss of water and minerals.
3. Casparian strip The casparian strip present in the wall of endodermal cells is made up of lignosuberin, a waxy-substance that prevents movement of water and minerals via cell wall route.
Symplast pathway Water moves from cell to cell through living cytoplasm and plasmodesmata.