NEETBotanyPlant - Growth and Development
Which of the following is a naturally occurring auxin?
Options
- ANAA (naphthalene acetic acid)
- BIAA (indole-3-acetic acid)
- C2, 4-D (2, 4-dichlorophenoxyacetic acid)
- DIBA (indole butyric acid)
Correct answer
B. IAA (indole-3-acetic acid)
Step-by-step solution
They are generally produced by the growing apices of the stems and roots, from where they migrate to the regions of their action. Auxins like IAA and indole butyric acid (IBA) have been isolated from plants. NAA (naphthalene acetic acid) and 2, 4-D (2, 4-dichlorophenoxyacetic) are synthetic auxins . All these auxins have been used extensively in agricultural and horticultural practices.