Dwarfness can be controlled by treating plants with:

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RRB ALP CBT I 17 Aug 2018 Shift 3 Official Paper
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  1. Cytokinin
  2. Gibberellic acid
  3. Ethylene
  4. Auxin

Answer (Detailed Solution Below)

Option 2 : Gibberellic acid
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The correct answer is Gibberellic acid.

Key Points

  • Gibberellic acid
    • Gibberellic acid is a plant hormone that helps plant stems grow.
    • It also causes rapid flowering of plants. It replaces the long time required for screwing in factories.
    • It also helps to lengthen internodes in a way that helps dwarf plants overcome genetic dwarfism.
    • Therefore, to overcome genetic dwarfism, plants are treated with gibberellic acid.

Additional Information

  • Cytokinin:
    • The cytokinin hormone is a plant growth regulator whose primary function is to control cell division and growth in the meristem regions of the plant.
    • It is produced in shoots and roots, where active growth in leaves, buds, branches, flowers, and fruits takes place.
  • Ethylene:
    • Ethylene is an unsaturated organic compound with the chemical formula C2H4.
    • It has a double bond and is the simplest member of the class of alkene hydrocarbons.
  • Auxin:
    • Auxins are a group of naturally and artificially synthesized plant hormones.
    • They play an important role in regulating plant growth. Auxins were originally isolated from human urine.
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