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The barrier inside the root that prevent...

The barrier inside the root that prevents water from leaking out of the vascular tissue is the

A

Epidermis

B

Casparian strip

C

Apoplast

D

Root hairs

Text Solution

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The correct Answer is:
To answer the question regarding the barrier inside the root that prevents water from leaking out of the vascular tissue, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding Root Structure**: - Roots have various layers and structures that facilitate the movement of water and nutrients. The main components include the epidermis, cortex, endodermis, pericycle, and vascular tissue (xylem and phloem). 2. **Identifying the Vascular Tissue**: - The vascular tissue in roots primarily consists of xylem, which is responsible for the transport of water and minerals from the roots to other parts of the plant. 3. **Role of the Endodermis**: - The endodermis is the innermost layer of the cortex in the root. It acts as a selective barrier that regulates the flow of water and solutes into the vascular tissue. 4. **Casparian Strip**: - Within the endodermis, there is a structure known as the Casparian strip, which is made of suberin (a waxy substance). This strip is crucial because it forces water to pass through the cell membranes of the endodermal cells rather than between them. 5. **Conclusion**: - The barrier that prevents water from leaking out of the vascular tissue is primarily due to the **Casparian strip** located in the endodermis. It ensures that water and nutrients are selectively absorbed into the vascular system rather than being lost. ### Final Answer: The barrier inside the root that prevents water from leaking out of the vascular tissue is the **Casparian strip**. ---
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