Question
Answer the following:
  1. Name the stress hormone found in plants.
  2. What causes 'bakane' disease of rice?
  3. Why do lateral buds start developing into branches, when apical buds are removed?

Answer

  1. Abscisic acid is the stress hormone.
  2. The 'bakane' disease is caused by Gibberella fujikuroi.
  3.  
  • When the apical buds are removed, the synthesis of auxin decreases.
  • Auxins are responsible for apical dominance, a phenomenon in which the lateral buds are suppressed to grow into branches.
  • In the absence of auxins (apical buds), there is no apical dominance and hence, the lateral buds develop into branches.

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