Question

Which of the following test is performed to demonstrate the presence of gibberellin?

• A. Bolting of cabbage
• B. Differentiation of shoots in tobacco callus culture
• C. Rapid division in carrot cells
• D. Elongation of Avena coleoptile

Answer 1

The correct option is A Bolting of cabbage

Gibberellin induces stem elongation in rosette plants. Cabbage is a rosette plant with profuse leaf growth and retarded internodal length. Just prior to flowering, internodes elongate enormously. This is called as bolting. Bolting needs either long days or cold nights. When a cabbage head is kept under warm nights, it retains its rosette habit. Bolting can be induced artificially by the application of gibberellins under normal conditions.

Therefore, the correct answer is option A.