florigen is synthesised in

Options

A. Leaves
B. Fruit
C. Root
D. Trunk.

Answer

**Step-by-Step Solution:**

1. **Understanding Florigen**: Florigen is a hypothetical hormone that plays a crucial role in the flowering process of plants.

2. **Identifying the Site of Synthesis**: The question asks where Florigen is synthesized. It is known that Florigen is synthesized in the leaves of the plant.

3. **Function of Florigen**: Once synthesized in the leaves, Florigen is transported to the shoot apical meristem (SAM). This is where it promotes the transition from vegetative growth to flowering.

4. **Conclusion**: Based on the information, the correct answer to the question "Florigen is synthesized in" is the leaves.

5. **Final Answer**: Therefore, the correct option is **leaves** (Option 1).

---