Gibberellin acid induce flower

Options

A. In short day plants under long day conditions
B. In day neutral plants under dark conditions
C. In some gymnospermic plants only
D. In long day plants under short day conditions

Answer

### Step-by-Step Solution:

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

2. **Flowering in Plants**:
- Flowering in plants can be influenced by various environmental factors, including light duration. Plants can be categorized based on their light requirements for flowering: short-day plants, long-day plants, and day-neutral plants.

3. **Short-Day vs. Long-Day Plants**:
- Short-day plants require longer nights (shorter days) to flower, while long-day plants require shorter nights (longer days) to initiate flowering. Day-neutral plants can flower regardless of day length.

4. **Gibberellins and Flowering**:
- Gibberellins can induce flowering in some plants by promoting the transition from vegetative to flowering stages. They can sometimes enable flowering in conditions that are not normally conducive to it.

5. **Analyzing the Options**:
- The question presents several scenarios regarding gibberellin-induced flowering:
- A) Short day plants under long day conditions
- B) Day neutral plants under dark conditions
- C) Some gymnosperms only
- D) Long day plants under short day conditions

6. **Correct Option**:
- Based on the understanding that gibberellins can induce flowering in long-day plants even when they are subjected to short-day conditions, the correct answer is **Option D**: "in long day plants under short day conditions."