florigen is synthesised in

Options

A. leaves
B. fruit
C. stem
D. root

Answer

**Step-by-Step Text Solution:**

1. **Understanding Florigen**: Florigen is a hypothetical hormone that plays a crucial role in the flowering process of plants. It is believed to be synthesized in response to certain environmental cues, particularly light.

2. **Location of Synthesis**: According to the information provided, Florigen is synthesized in the leaves of the plant. More specifically, it is produced in the mature broad leaves.

3. **Role of Light**: The synthesis of Florigen is influenced by light conditions. In long-day plants, a light duration exceeding a critical threshold (e.g., more than 8 hours) is necessary to trigger the conversion of the shoot apical meristem into a floral meristem.

4. **Impact of Leaf Removal**: The importance of leaves in the synthesis of Florigen can be demonstrated through defoliation experiments. If the leaves (especially mature broad leaves) are removed, the plant will not flower even if it is exposed to adequate light conditions.

5. **Conclusion**: Based on the above points, we conclude that Florigen is synthesized in the leaves, specifically in the mature broad leaves of the plant.

**Final Answer**: Florigen is synthesized in the leaves.

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