Gibberellin application to a plant brings about

Options

A. Leaf fall
B. Diversification of root system
C. Elongation of shoot system
D. Delay in senescence.

Answer

**Step-by-Step Solution:**

1. **Understanding Gibberellins**: Gibberellins are a class of plant hormones that play a crucial role in regulating various aspects of plant growth and development.

2. **Effects of Gibberellins**: One of the primary effects of gibberellins is promoting the elongation of the shoot system. This means that when gibberellins are applied to a plant, they stimulate the growth of the stem and leaves, leading to increased height and size.

3. **Bolting**: In certain plants, particularly rosette plants, gibberellins induce a process known as "bolting." This is characterized by rapid stem elongation, which typically occurs in response to environmental cues such as longer day lengths or cold temperatures.

4. **Comparison with Other Hormones**: It is important to differentiate gibberellins from other plant hormones:
- **Abscisic Acid**: This hormone is primarily involved in processes such as leaf fall (abscission).
- **Auxins**: These hormones are responsible for the elongation of roots and shoots but do not specifically promote shoot elongation as gibberellins do.
- **Cytokinins**: These hormones are associated with delaying senescence (aging) in plants.

5. **Conclusion**: Based on the functions of gibberellins and their role in promoting shoot elongation, the correct answer to the question is that gibberellin application to a plant brings about the elongation of the shoot system.

**Final Answer**: Gibberellin application to a plant brings about elongation of the shoot system.

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