Question

Importance of day length (photoperiodism) in flowering of plants was first

shown in ..................

• A. Cotton
• B. Petunia
• C. Lemna (Photoperiodism)
• D. Tobacco

Answer 1

The correct option is D Tobacco

Experiments related to photoperiodism was first tried in tobacco plants. Experiments with artificial lighting have found many plants are not only sensitive to the length of day light, but are dependent on it for reproduction and survival. It is called photoperiodism and it will need to be taken into account when transplanting species to a newly terraformed planet.