The plant hormone that induces cell proliferation ,plant growth and development , trigger callus differentiation , embryogenesis , maintenance of root and shoot meristems , keep the cut flowers and vegetables fresh is

Options

A. Gibberellins
B. Cytokinins
C. Auxins
D. Ethylene

Answer

To solve the question regarding the plant hormone that induces cell proliferation, promotes plant growth and development, triggers callus differentiation, supports embryogenesis, maintains root and shoot meristems, and keeps cut flowers and vegetables fresh, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Functions Described**:
The question lists several functions of the hormone:
- Induces cell proliferation
- Promotes plant growth and development
- Triggers callus differentiation
- Supports embryogenesis
- Maintains root and shoot meristems
- Keeps cut flowers and vegetables fresh

2. **Evaluate the Options**:
The options provided are:
- A) Zeberlins
- B) Cytokinins
- C) Auxin
- D) Ethylene

3. **Analyze Each Option**:
- **A) Zeberlins**: Primarily involved in stem elongation and seed germination. Not responsible for all the functions mentioned.
- **B) Cytokinins**: Known for promoting cell division and proliferation, aiding in callus differentiation, maintaining meristems, delaying senescence (aging), and keeping cut flowers and vegetables fresh.
- **C) Auxin**: Mainly involved in root formation and parthenocarpy, but does not cover all the functions listed.
- **D) Ethylene**: A gaseous hormone that primarily promotes fruit ripening, not directly related to the other functions.

4. **Select the Correct Answer**:
Based on the analysis, **Cytokinins** (Option B) is the hormone that fulfills all the criteria mentioned in the question.

### Final Answer:
The correct answer is **Cytokinins**.

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