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NEET2026BotanyPlant - Growth and DevelopmentActual

Which of the following plant growth regulators is used as herbicide ?

Options

  1. AGibberellin
  2. B2,4-D
  3. CKinetin
  4. DAbscisic acid

Correct answer

B. 2,4-D

Step-by-step solution

Plant growth regulators have various physiological functions in plants. 2,4-D (2,4-Dichlorophenoxyacetic acid) is a synthetic auxin. It is widely used as a herbicide to kill broad-leaved dicotyledonous weeds in cereal crops and lawns, as it does not affect mature monocotyledonous plants. Gibberellins are used to promote stem elongation and seed germination. Kinetin is a cytokinin that promotes cell division. Abscisic acid is a stress hormone that inhibits growth and promotes seed dormancy.

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