Interfascicular cambium develops from the cells of

Options

A. Endodermis
B. Pericycle
C. Medullary rays
D. Xylem parenchyma

Answer

To solve the question "Interfascicular cambium develops from the cells of," we will analyze the options provided and identify the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Interfascicular Cambium**:
- Interfascicular cambium is a type of cambium that forms between the vascular bundles (fascicles) in dicotyledonous plants. It plays a crucial role in secondary growth by producing secondary xylem and phloem.

2. **Analyzing the Options**:
- **Option A: Endodermis**: The endodermis is the innermost layer of the cortex, primarily involved in regulating the flow of water and nutrients into the vascular system. It does not contribute to the formation of cambium.
- **Option B: Pericycle**: The pericycle is a layer of cells just inside the endodermis and is involved in the formation of lateral roots. While it has meristematic capabilities, it does not directly give rise to the interfascicular cambium.
- **Option C: Medullary Rays**: Medullary rays are radial files of parenchyma cells that extend between the vascular bundles in the stem. These cells can become meristematic and contribute to the formation of interfascicular cambium.
- **Option D: Xylem Parenchyma**: Xylem parenchyma consists of living cells that store food and assist in the transport of water and nutrients. However, they do not develop into interfascicular cambium.

3. **Identifying the Correct Answer**:
- Based on the analysis, the interfascicular cambium develops from the cells of the **medullary rays**. These cells can become meristematic and contribute to the cambial layer.

### Conclusion:
The correct answer to the question is **medullary rays**.

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