Vernalisation is perceived by `"____________"` part of the mature plant.

Answer

**Step-by-Step Solution:**

1. **Understanding Vernalization**: Vernalization is the process by which plants are induced to flower after being exposed to prolonged cold temperatures, typically during winter. This process is crucial for certain plants to transition from the vegetative phase to the reproductive phase.

2. **Role of Temperature**: The process of vernalization highlights the dependency of flowering on temperature, which is one of the environmental factors that influence plant development.

3. **Effects of Low Temperature**: Exposure to low temperatures during vernalization shortens the vegetative phase of the plant. As a result, the plant can transition to the reproductive phase more quickly, leading to earlier flowering.

4. **Perception of Vernalization**: The question specifically asks which part of the mature plant perceives vernalization. According to the information provided, the shoot tip, embryo tip, and meristematic region are involved in this perception.

5. **Final Answer**: Therefore, the correct answer to the question is that vernalization is perceived by the **"shoot tip"** of the mature plant.

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