Question:
Identify the derivative of carotenoids
Identify the derivative of carotenoids
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ABA (abscisic acid) = carotenoid-derived stress hormone.
Updated On: Jul 18, 2026
- Gibberellic acid
- Indole butyric acid
- Indole-3-acetic acid
- Abscisic acid
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The Correct Option is D
Solution and Explanation
Step 1: Understanding plant hormones.
Plant hormones are chemical regulators that control growth and development. They are classified based on their chemical origin such as amino acid derivatives, terpene derivatives, and carotenoid derivatives.
Step 2: Origin of abscisic acid (ABA).
Abscisic acid is derived from carotenoids, specifically through oxidative cleavage of carotenoid molecules. This makes it a key stress hormone in plants.
Step 3: Function of ABA.
ABA regulates seed dormancy, stomatal closure, and stress responses like drought tolerance. It acts as a growth inhibitor in many conditions.
Step 4: Evaluation of other options.
IAA and IBA are derived from amino acid tryptophan, while gibberellic acid is a diterpenoid. Only ABA is carotenoid-derived.
Step 5: Biological significance.
Carotenoid breakdown products play a crucial role in plant stress signaling and adaptation mechanisms.
Step 6: Final conclusion.
Thus, abscisic acid is the correct carotenoid derivative.
Plant hormones are chemical regulators that control growth and development. They are classified based on their chemical origin such as amino acid derivatives, terpene derivatives, and carotenoid derivatives.
Step 2: Origin of abscisic acid (ABA).
Abscisic acid is derived from carotenoids, specifically through oxidative cleavage of carotenoid molecules. This makes it a key stress hormone in plants.
Step 3: Function of ABA.
ABA regulates seed dormancy, stomatal closure, and stress responses like drought tolerance. It acts as a growth inhibitor in many conditions.
Step 4: Evaluation of other options.
IAA and IBA are derived from amino acid tryptophan, while gibberellic acid is a diterpenoid. Only ABA is carotenoid-derived.
Step 5: Biological significance.
Carotenoid breakdown products play a crucial role in plant stress signaling and adaptation mechanisms.
Step 6: Final conclusion.
Thus, abscisic acid is the correct carotenoid derivative.
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