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MHT CET Medical202622 April 2026Morning ShiftBiologyPlant - Growth and DevelopmentActual

Which one of the following is the most striking effect of gibberellins?

Options

  1. AOvercomes the requirement of vernalization.
  2. BBreaks dormancy of seeds.
  3. CConversion of genotypic dwarf plants into phenotypic tall plants.
  4. DDelays senescence and prevents abscission.

Correct answer

C. Conversion of genotypic dwarf plants into phenotypic tall plants.

Step-by-step solution

Gibberellins are plant growth regulators that promote internodal elongation. Their most striking and characteristic effect is the reversal of dwarfism in many genetically dwarf plants, such as dwarf pea and maize. When gibberellins are applied to these genotypically dwarf plants, they undergo rapid stem elongation and become phenotypically tall, indistinguishable from normal tall varieties. Answer: Conversion of genotypic dwarf plants into phenotypic tall plants.

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