Importance of day length in flowering of plants was first shown in
None of the above
Correct answer: (b)
Solution: 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.