Question:
A plant hormone produced during abiotic and biotic stress conditions, and also known as a stress indicator, is
A plant hormone produced during abiotic and biotic stress conditions, and also known as a stress indicator, is
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Abscisic Acid (ABA) = Stress hormone (regulates stomatal closure during drought and enforces seed dormancy).
Updated On: Sep 15, 2026
- auxin
- cytokinin
- ABA
- GA
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
Plants synthesize specific phytohormones to coordinate developmental arrest and physiological survival under environmental stress.
Step 2: Detailed Explanation:
Abscisic Acid (ABA) is universally recognized as the 'stress hormone' in plants.
Under drought, salinity, osmotic, or cold stress, endogenous ABA concentrations increase dramatically in roots and shoots, inducing rapid stomatal closure via potassium efflux in guard cells, promoting seed dormancy, and triggering stress-protective LEA protein synthesis.
Step 3: Final Answer:
Hence, ABA is the stress hormone and stress indicator.
Plants synthesize specific phytohormones to coordinate developmental arrest and physiological survival under environmental stress.
Step 2: Detailed Explanation:
Abscisic Acid (ABA) is universally recognized as the 'stress hormone' in plants.
Under drought, salinity, osmotic, or cold stress, endogenous ABA concentrations increase dramatically in roots and shoots, inducing rapid stomatal closure via potassium efflux in guard cells, promoting seed dormancy, and triggering stress-protective LEA protein synthesis.
Step 3: Final Answer:
Hence, ABA is the stress hormone and stress indicator.
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