Specific property attributed to gibberellins is

Options

A. Shortening of genetically tall plants
B. Elongation of genetically dwarf plants
C. Rooting of stem cutting
D. Promotion of leaf and fruit fall

Answer

To answer the question regarding the specific property attributed to gibberellins, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Gibberellins**: Gibberellins are a group of plant hormones that play a crucial role in various aspects of plant growth and development, including stem elongation, seed germination, and flowering.

2. **Analyzing the Options**:
- **Option A: Shortening of genetically tall plants**: This is incorrect because gibberellins promote growth rather than shortening. Cytokinins are more associated with overcoming apical dominance, which allows lateral growth.
- **Option B: Elongation of genetically dark plants**: This is correct. Gibberellins promote elongation, particularly in plants that are genetically predisposed to be tall, such as the elongation seen in grape stalks and sugarcane.
- **Option C: Rooting of stem cutting**: This is primarily influenced by auxins, not gibberellins.
- **Option D: Promotion of leaf and fruit fall**: This is associated with abscisic acid, which helps in the process of leaf and fruit abscission, not gibberellins.

3. **Conclusion**: Based on the analysis of the options, the specific property attributed to gibberellins is the elongation of genetically dark plants.

### Final Answer:
The specific property attributed to gibberellins is **elongation of genetically dark plants**.

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