Question

Which hormone inhibits the growth of plants?

• A. Auxin
• B. Cytokinin
• C. Gibberellin
• D. Abscisic acid

Hint:

Abscisic acid is essential for plant survival during adverse conditions, helping plants conserve resources and protect against environmental stresses.

Answer 1

The Correct Option is D

Abscisic acid is a plant hormone that plays a crucial role in inhibiting growth. It is involved in various plant developmental processes and stress responses, including seed dormancy, stomatal closure, and inhibition of bud growth. Unlike hormones like auxin and gibberellin, which promote growth, abscisic acid acts as a growth inhibitor, especially under stress conditions such as drought.

Functions of Abscisic Acid: Induces seed dormancy to prevent germination during unfavorable conditions. Promotes stomatal closure to reduce water loss during drought. Inhibits shoot and root growth under stress conditions. 

Conclusion: Abscisic acid serves as a key hormone in managing plant growth and responses to environmental stresses by acting as a growth inhibitor.