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Which one of the following growth regulators is known as the 'stress hormone'?

  1. A
    Abscissic acid
  2. B
    Ethylene
  3. C
  4. D
    Indole acetic acid

Solution & Step-by-step Explanation

Abscissic acid (ABA) is called the "stress hormone" because its production is stimulated under environmental stress conditions (like water deficiency), leading to effects such as the closure of stomata to prevent water loss.

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Which one of the following growth regulators is known as the 'stress hormone'?
A
Abscissic acid
B
Ethylene
C
D
Indole acetic acid

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