In root, the tangential as well as radial walls of the barrel-shaped endodermal cells have a deposition of water impermeable, waxy material-suberin in the form of -

Options

A. Cuticle strips
B. Protein strips
C. Casparian strips
D. Silicious strips

Answer

To answer the question regarding the deposition of water-impermeable, waxy material (soberin) in the endodermal cells of the root, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure**: The question refers to the endodermis of the root, which is a layer of cells that surrounds the vascular tissue.

2. **Understand the Cell Type**: The endodermal cells are barrel-shaped and play a crucial role in regulating the movement of water and nutrients into the vascular system of the plant.

3. **Recognize the Material**: The waxy material mentioned in the question is called "soberin". It is a type of suberin, which is a hydrophobic substance that makes the cell walls impermeable to water.

4. **Location of Deposition**: The deposition of suberin occurs specifically in the tangential and radial walls of the endodermal cells. This means that the sides of the cells facing each other (tangential) and the sides facing the interior of the root (radial) are coated with this material.

5. **Function of Suberin**: The presence of suberin in the endodermis serves to prevent the loss of water from the plant and ensures that water and dissolved nutrients must pass through the cell membranes of the endodermal cells, allowing for selective absorption.

6. **Conclusion**: Therefore, the deposition of water-impermeable waxy material, suberin, in the form of bands or strips on the tangential and radial walls of the barrel-shaped endodermal cells is a crucial adaptation for water regulation in plants.