Abscisic Acid: Stress Hormone Role — NEET Biology
🔥 Predicted for NEET 2027As mentioned earlier, abscisic acid (ABA) was discovered for its role in regulating abscission and dormancy. But like other PGRs, it also has other wide ranging effects on plant growth and development. It acts as a general plant growth inhibitor and an inhibitor of plant metabolism. ABA increases the tolerance of drought and cold in plants and increases the tolerance of plants to various kinds of stresses. Therefore, it is also called the stress hormone. ABA plays an important
Adjacent to a frequently-asked paragraph in the same chapter.
Assertion (A): ABA acts as a stress hormone during drought by closing stomata. Reason (R): This is an example of extrinsic factor regulation of development
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