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NEET 2012
Exam
NEET
Year
2012
Subject
Botany
Chapter
Plant - Growth and Development

NEET 2012 · Botany · Plant - Growth and Development

Which one of the following generally acts as an antagonist to...

Which one of the following generally acts as an antagonist to gibberellins?

Options

  1. AZeatin
  2. BEthylene
  3. CABA
  4. DIAA

Correct answer

C. ABA

Step-by-step solution

Abscisic acid (ABA) is also called stress hormone. It is a mildly acidic growth hormone which functions as a general growth inhibitor by counteractig other hormones (auxin, gibberelliun, cytokinin) or reactions mediated by them. It causes stomatal closure, abscission of flower and fruits while gibberellin helps in opening of stomata and promote development of fruits.
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