What is the effect on the flowering of a plan | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The flowering response in plants is regulated by the phytochrome pigment system,which exists in two interconvertible forms: $P_r$ (red light-absor

Vedclass · Accepted Answer

Effect of red flash is reversed

Vedclass · Answer

(D) The flowering response in plants is regulated by the phytochrome pigment system,which exists in two interconvertible forms: $P_r$ (red light-absorbing) and $P_{fr}$ (far-red light-absorbing).Red light $(660 \ nm)$ converts $P_r$ to the active form $P_{fr}$,which promotes flowering in long-day plants.Far-red light $(730 \ nm)$ converts $P_{fr}$ back to the inactive form $P_r$.Therefore,if a flash of red light is immediately followed by a flash of far-red light,the $P_{fr}$ formed by the red light is converted back to $P_r$,effectively nullifying the effect of the red light. Thus,the effect of the red flash is reversed.

What is the effect on the flowering of a plant if a flash of red light is followed by a flash of far-red light?

Similar Questions

Which of the following exerts a profound effect on the reproductive growth of a flowering plant?

Write a short note on: $(1)$ Vernalisation.

The site of perception of light for photoperiodism is:

What will happen if several bulbs are lighted in soybean fields at night?

Which of the following is a day-neutral plant?

Vedclass Test Series

Exam Paper Generator

Online Exam Module