In breathing roots( pneumatophores) of man grove plants, the xylem is

Options

A. exarch protoxylem
B. measarch
C. endarch protoxylem
D. none of these

Answer

To answer the question regarding the xylem in the breathing roots (pneumatophores) of mangrove plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Xylem**:
- Xylem is a type of vascular tissue responsible for the transport of water and nutrients in plants. It consists of different components, including tracheids and vessel elements.

2. **Identify the Types of Xylem**:
- There are two main arrangements of xylem:
- **Endarch**: In this arrangement, the protoxylem (the first xylem to develop) is located towards the inside, and the metaxylem (the later-formed xylem) is on the outside. This is typically found in monocots.
- **Exarch**: In this arrangement, the protoxylem is located towards the outside, and the metaxylem is towards the inside. This is commonly found in dicots.

3. **Relate to Mangrove Plants**:
- Mangrove plants often have specialized roots known as pneumatophores that help them breathe in waterlogged environments.

4. **Determine the Type of Xylem in Pneumatophores**:
- Since pneumatophores are primarily found in monocots, they exhibit the endarch arrangement of xylem.

5. **Conclusion**:
- Therefore, in the breathing roots (pneumatophores) of mangrove plants, the xylem is **endarch**.

### Final Answer:
In breathing roots (pneumatophores) of mangrove plants, the xylem is **endarch**.

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