Plant Growth Regulators · NCERT Biology

Which of the following plant growth regulators is responsible for the 'bakanae' (foolish seedling) disease in rice?

  1. Indole-3-acetic acid
  2. Abscisic acid
  3. Gibberellic acid
  4. Zeatin
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Correct answer: Gibberellic acid

The bakanae disease in rice seedlings was caused by the fungal pathogen Fusarium moniliforme. E. Kurosawa identified that the symptoms were induced by a substance later named Gibberellic acid.

Difficulty: Medium Question 2 of 20

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