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 answer the question "Which of the following phytophormones are used to hasten the process of maturation in conifers?", we will analyze each of the given options: ABA, auxin, gibberellin, and cytokinins.

### Step-by-Step Solution:

1. **Understanding Phytohormones**:
- Phytohormones, or plant hormones, are chemical substances that regulate various physiological processes in plants, including growth, development, and maturation.

2. **Analyzing ABA (Abscisic Acid)**:
- ABA is known as the stress hormone. It primarily functions to close stomata and inhibit germination. It does not promote maturation; instead, it acts as an inhibitor.
- **Conclusion**: ABA is not responsible for hastening maturation.

3. **Analyzing Auxin**:
- Auxin is involved in various growth processes such as apical dominance and promoting flowering in certain plants. However, it is not specifically known for hastening maturation in conifers.
- **Conclusion**: Auxin does not significantly contribute to hastening maturation.

4. **Analyzing Gibberellin**:
- Gibberellins are known to promote growth and development processes, including seed germination and stem elongation. They play a crucial role in breaking dormancy and hastening maturation in various plants, including conifers.
- **Conclusion**: Gibberellin is responsible for hastening maturation.

5. **Analyzing Cytokinins**:
- Cytokinins primarily promote cell division and delay senescence (aging) in plants. They are not directly involved in hastening maturation.
- **Conclusion**: Cytokinins do not hasten maturation.

### Final Answer:
The phytohormone that hastens the process of maturation in conifers is **Gibberellin**.

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