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NEET 2013
Exam
NEET
Year
2013
Subject
Botany
Chapter
Plant - Growth and Development

NEET 2013 · Botany · Plant - Growth and Development

The pineapple which under natural condition is difficult to blossom...

The pineapple which under natural condition is difficult to blossom has been made to produce fruits throughout the year by application of:

Options

  1. ANAA, 2, 4-D
  2. BPhenyl acetic acid
  3. CCytokinin
  4. DIAA, IBA

Correct answer

A. NAA, 2, 4-D

Step-by-step solution

NAA (alpha Naphthalene acetic acid) and 2,4 Dichlorophenoxy acetic acid are synthetic auxins. Normally, auxins inhibit flowering. In litchi and pineapple, it promotes flowering. Related Theory Antiauxins are a group of chemicals that can prevent auxin-action in plants. Transcinnamic acid, ascorbic acid, 7-phenyl butyric acid are some of these antiauxins. Probably, an antiauxin competes with an auxin for the same site of reaction and thus inhibits auxin-action.
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