Which plant hormone is released from an injured or over tip fruit which brings ripening of other fruits ?

Answer

To solve the question regarding which plant hormone is released from an injured or overripe fruit that induces ripening in other fruits, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Context**: The question is about a specific plant hormone that plays a role in fruit ripening, particularly when a fruit is injured or overripe.

2. **Recall Plant Hormones**: There are several plant hormones, but we need to focus on those known for their role in fruit ripening.

3. **Focus on Ethylene**: Ethylene is a well-known plant hormone that is unique because it is a gaseous hormone. It is known to be released in response to stress in plants, including when fruits are injured or overripe.

4. **Understand the Function of Ethylene**: Ethylene promotes the ripening of fruits. When one fruit releases ethylene, it can trigger the ripening process in nearby fruits, even if they are not yet ripe.

5. **Conclude the Answer**: Based on the information gathered, the plant hormone that is released from an injured or overripe fruit and promotes the ripening of other fruits is **ethylene**.

### Final Answer:
The plant hormone released from an injured or overripe fruit that brings about the ripening of other fruits is **ethylene**.

---