The cut flowers and vegetables are kept fresh for a long period by which of the following plant hormone ?

Options

A. Auxin
B. Gibberellin
C. Cytokinin
D. Ethylene

Answer

To solve the question regarding which plant hormone keeps cut flowers and vegetables fresh for a long period, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Plant Hormones**: The options provided are auxin, gibberellin, cytokinin, and ethylene. We need to analyze each hormone's function.

2. **Understand the Function of Cytokinins**: Cytokinins are known for their role in promoting cell division and delaying senescence (aging) in plants. They help in maintaining the freshness of cut flowers and vegetables by delaying the aging process.

3. **Examine Other Hormones**:
- **Auxins**: These hormones are primarily involved in cell elongation and growth processes, such as stem elongation and root formation. They do not significantly contribute to the preservation of cut flowers.
- **Gibberellins**: These hormones are involved in various growth processes, including seed germination and stem elongation. They do not play a major role in delaying aging of cut flowers or vegetables.
- **Ethylene**: This is a gaseous hormone that promotes ripening in fruits. While it is important for fruit ripening, it does not help in preserving freshness.

4. **Conclusion**: Based on the functions of these hormones, cytokinin is the hormone that effectively delays aging and increases the shelf life of cut flowers and vegetables.

5. **Final Answer**: The correct answer is **cytokinin**.