Question

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

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

Answer 1

The correct option is C

Gibberellic acid.

The correct option is C.

Explanation for Correct option:

1. Gibberellic acid is a plant hormone that breaks seed dormancy by activating enzyme α - amylase.
2. The hormone abscisic acid and phenolic acid are responsible to induce seed dormancy.

Explanation of the incorrect option:

Option A:

Phenolic acids, also known as phenol carboxylic acids, are aromatic acids that contain a phenolic ring and a carboxyl functional group.

Option B:

A natural water-soluble vitamin which is also called vitamin C.

Option D:

Abscisic acid stimulates the closure of stomata in the epidermis and increases the tolerance of a plant to various kinds of stresses.

Final answer:

Gibberellic acid is not an inhibitory substance governing seed dormancy.