Which of the following phytophormones are used to hasten the process of maturation in conifers

Options

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

Answer

To solve the question regarding which phytophormones are used to hasten the process of maturation in conifers, we will analyze each of the provided options step by step.

### Step 1: Understand the options
The options given are:
1. Abscisic Acid (ABA)
2. Auxin
3. Gibberellin
4. Cytokinin

### Step 2: Analyze Abscisic Acid (ABA)
- **Function**: ABA is known as a stress hormone. It plays a crucial role in helping plants cope with stress conditions, such as drought, by closing stomata to reduce water loss.
- **Conclusion**: ABA does not hasten maturation; instead, it helps plants manage stress. Therefore, this option is incorrect.

### Step 3: Analyze Auxin
- **Function**: Auxin is a vital plant hormone involved in various growth processes, including cell elongation, differentiation of xylem, and overall plant growth.
- **Conclusion**: While auxin is important for growth, it does not specifically hasten maturation in conifers. Thus, this option is also incorrect.

### Step 4: Analyze Gibberellin
- **Function**: Gibberellins (GA) are important for several plant processes, including promoting leaf senescence, flowering, and seed germination. They are known to influence the maturation process in certain plants.
- **Conclusion**: Gibberellins are known to hasten the maturation process in conifers, making this option the correct one.

### Step 5: Analyze Cytokinin
- **Function**: Cytokinins are primarily involved in promoting cell division (cytokinesis) and have roles in various growth processes.
- **Conclusion**: Cytokinins do not have a role in hastening maturation in conifers. Therefore, this option is incorrect.

### Final Conclusion
Based on the analysis, the correct answer to the question is **Gibberellin**.

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