Which one of the following hormone induces flowering?

Options

(a) auxin
(b) florigen
(c) cytokinins
(d) gibberelin

Correct Answer:

florigen

Explanation:

The chemical which induces flower formation has been named as florigen. By grafting experiments, it has been found that the stimulus of flowering can pass from the induced plant to the non-induced plant even if the latter is growing under unfavourable photoperiods.