Which one of the following generally acts as an antagonist to gibberellins?
- Zeatin
- Ethylene
- ABA
- IAA
Answer
(3) ABA
Solution
As per NCERT, ABA acts as a general plant growth inhibitor and an inhibitor of plant metabolism; it acts as an antagonist to GAs.
⇒ Gibberellins break seed dormancy, while ABA induces dormancy.
Answer: (3)