Question

Primary and secondary growth are inhibited by

• A. auxin
• B. gibberellins
• C. abscisic actid
• D. cytokinins

Answer 1

The correct option is C

Explanation of correct answer:

1. Abscisic acid (ABA) is a plant growth inhibitor.
2. It is the stress hormone that induces the expression of defence genes in many organs.
3. It modulates ion homeostasis and metabolism in guard cells.
4. It plays a central role in the induction and maintenance of seed dormancy.
5. It also inhibits the transition from embryonic to germination growth.