Importance of day length in flowering of plants was first shown in a. cotton b. Petunia c. Lemna d. tobacco
OptionnD. The reaction of the length of day and night on the flowering of the plants is known as photoperiodism. Angiosperms make use of a photoreceptor protein such as phytochrome to sense the changes. The first set of experiments were conducted successfully in Maryland on tobacco to show the effect of day length on flowering.
