The tissues involved in secondary growth of dicot plants are vascular cambium and ................... .

Answer

To answer the question about the tissues involved in the secondary growth of dicot plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Secondary Growth**:
- Secondary growth refers to the increase in the girth or diameter of the plant. This is primarily observed in dicotyledons (dicots) and gymnosperms.

2. **Identifying the Tissues Involved**:
- The two main tissues involved in secondary growth are the vascular cambium and the cork cambium.

3. **Role of Vascular Cambium**:
- The vascular cambium is a type of lateral meristem that produces secondary xylem (wood) and secondary phloem (bark). It is located between the primary xylem and primary phloem.

4. **Role of Cork Cambium**:
- The cork cambium, also known as phellogen, is another lateral meristem that produces cork cells. These cells are important for protecting the plant and preventing water loss.

5. **Conclusion**:
- Therefore, the complete answer to the question is that the tissues involved in the secondary growth of dicot plants are vascular cambium and cork cambium.

### Final Answer:
The tissues involved in the secondary growth of dicot plants are vascular cambium and **cork cambium**.

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