Periblem is a part of

Options

A. Cortex
B. Stele
C. Apical meristem
D. Vascular bundle

Answer

To solve the question "Periblem is a part of," we will analyze the options provided and understand the concept of periblem in relation to plant histology.

### Step-by-Step Solution:

1. **Understanding Periblem**:
- Periblem is a layer found in the shoot apical meristem. It is important to know its position and function within the plant structure.

2. **Histogen Theory**:
- According to the histogen theory proposed by Hanstein, the shoot apical meristem is divided into three distinct zones: dermatogen, periblem, and pleurome.

3. **Identifying the Layers**:
- **Dermatogen**: This is the outermost layer that forms the epidermis or outer covering of the plant.
- **Periblem**: This is the middle layer of the shoot apical meristem. It gives rise to the cortex and endodermis.
- **Pleurome**: This is the innermost layer that forms the pith and vascular bundles.

4. **Analyzing the Options**:
- The options given are cortex, stele, apical meristem, and vascular bundle.
- Since periblem is a part of the shoot apical meristem and gives rise to the cortex and endodermis, it is not the cortex itself.

5. **Conclusion**:
- Based on the information, periblem is a part of the **apical meristem**. Therefore, the correct answer is **apical meristem**.

### Final Answer:
Periblem is a part of the **apical meristem**.

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