Which of the following plant hormones inhibits growth?

This question was previously asked in
RRC Group D Previous Paper 41 (Held On: 16 Oct 2018 Shift 2)
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  1. Cytokinins
  2. Abscisic acid
  3. Gibberellins
  4. auxins 

Answer (Detailed Solution Below)

Option 2 : Abscisic acid
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RRB Group D Full Test 1
100 Qs. 100 Marks 90 Mins

Detailed Solution

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The correct answer is Abscisic acid.

Key Points

  • The plant hormone, Abscisic acid inhibits the growth of the plant.
  • Auxin, Gibberellins, and cytokinins promote the growth of the plant.
  • Abscisic Acid (ABA) is involved in the closure of stomata, seeds dormancy, and inhibit other hormonal actions.
    • It plays an important role in seed maturation.
    • It also has an important role in the synthesis of proteins and compatible osmolytes, which enable plants to tolerate stresses due to environmental or biotic factors.

Additional Information

  • Cytokinins, Gibberellins, Auxins are responsible for plant growth.
    • They are produced within the plant and occur in very low concentrations.
    • They control all aspects of plant growth and development, regulation of organ size, embryogenesis, stress tolerance, etc.

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