Through their effect on plant growth regiulators, what do the temperature and light control in the plants

Options

A. Stomatal closure
B. Apical dominance
C. Flowering
D. Fruit development.

Answer

**Step-by-Step Solution:**

1. **Understanding Plant Growth Regulators**:
- Plant growth regulators, also known as phytohormones, are natural substances that regulate various aspects of plant growth and development.

2. **Role of Temperature**:
- Temperature influences plant growth and development significantly. One specific effect of temperature is seen in the process of vernalization, which is the requirement of a period of cold temperature to induce flowering in certain plants.

3. **Role of Light**:
- Light affects plant growth through a phenomenon known as photoperiodism. Photoperiodism is the response of plants to the relative lengths of day and night, which can trigger flowering in some species.

4. **Hormonal Involvement**:
- Both vernalization and photoperiodism involve specific hormones. Vernalin is associated with the vernalization process, while another hormone, Fluorine, is linked to the flowering response triggered by photoperiodism.

5. **Conclusion**:
- Therefore, through their effects on plant growth regulators, temperature and light primarily control the process of flowering in plants.

**Final Answer**: Temperature and light control flowering in plants through their effects on plant growth regulators.

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