Question:
Which one of the following is the best-known growth promoter in vegetative propagation of tree species?
Which one of the following is the best-known growth promoter in vegetative propagation of tree species?
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Plant growth regulators:
- IBA: Root induction in cuttings.
- GA3: Stem elongation.
- NAA: Rooting and fruit set.
- IBA: Root induction in cuttings.
- GA3: Stem elongation.
- NAA: Rooting and fruit set.
Updated On: Sep 1, 2026
- GA3
- IBA
- Ethylene
- ABA
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of plant growth regulators in vegetative propagation.
Step 2: Detailed Explanation:
IBA (Indole-3-butyric acid) is the best-known growth promoter for root induction in vegetative propagation.
It is widely used for rooting cuttings.
GA3 (A): Promotes stem elongation.
Ethylene (C): Promotes fruit ripening.
ABA (D): Stress hormone.
Thus, the correct answer is IBA.
Step 3: Final Answer:
Thus, IBA is the best-known growth promoter in vegetative propagation, which corresponds to option (B).
[0.5cm]
This question tests knowledge of plant growth regulators in vegetative propagation.
Step 2: Detailed Explanation:
IBA (Indole-3-butyric acid) is the best-known growth promoter for root induction in vegetative propagation.
It is widely used for rooting cuttings.
GA3 (A): Promotes stem elongation.
Ethylene (C): Promotes fruit ripening.
ABA (D): Stress hormone.
Thus, the correct answer is IBA.
Step 3: Final Answer:
Thus, IBA is the best-known growth promoter in vegetative propagation, which corresponds to option (B).
[0.5cm]
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