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AIIMS2012BotanyPlant - Growth and Development

Abscisic acid is known as the stress hormone because it

Options

  1. Abreaks seed dormancy
  2. Binduces flowering
  3. Cpromotes leaf fall
  4. Dpromotes closure of stomata

Correct answer

D. promotes closure of stomata

Step-by-step solution

Abscisic acid acts as a general plant growth inhibitor and an inhibitor of plant metabolism. ABA inhibits seed germination. ABA stimulates the closure of stomata in the epidermis and increases the tolerance of plants to various kinds of stresses. Therefore, it is also called the stress hormone.

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