Which of the following plant hormone substtutes for long photoperiods in flowering plants

Options

A. Auxins
B. Gibberellins
C. Cytokinins
D. Ethylene

Answer

B

Explanation

Gibberellin induces stem elongation. In rosette plants, internodes growth is retarded and leaves are developed profusely. The internodes elongate enormously caused a marked increase in stem height. This is known as bolting.