Question

Which of the following is not an inhibitory substance governing seed dormancy ?

• A. Gibberellic acid
• B. Abscisic acid
• C. Phenolic acid
• D. Para-ascorbic acid

Answer 1

The Correct Option is A

To determine which of the following substances is not an inhibitory substance governing seed dormancy, we need to understand the role each option plays in plant physiology, particularly in relation to seed dormancy:

1. Gibberellic Acid: It is a plant hormone that promotes growth and development. It plays a key role in breaking seed dormancy and stimulating germination. Therefore, it is not an inhibitory substance for seed dormancy.
2. Abscisic Acid (ABA): This is a well-known inhibitory hormone that regulates seed dormancy and plays a significant role in maintaining dormancy by inhibiting seed germination.
3. Phenolic Acid: It can act as an inhibitory substance by affecting enzyme activities that are crucial for seed germination, thereby contributing to dormancy.
4. Para-ascorbic Acid: Known for its antioxidant properties, para-ascorbic acid can influence plant growth processes. However, in the context of seed dormancy, it can also act as an inhibitor.

Based on the above information, Gibberellic Acid is the substance that does not act as an inhibitor of seed dormancy. Instead, it promotes the breaking of dormancy and enhances germination.

Conclusion: The correct answer is Gibberellic Acid, which is not an inhibitory substance governing seed dormancy.