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

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(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 is a short day plant?

$A$ long-day plant will show flowering when the critical photoperiod duration is as follows:
Duration of light period $= A$
Duration of dark period $= B$

Assertion: Photomodulation of flowering is a phytochrome regulated process.
Reason: Active form of phytochrome $(P_{FR})$ directly induces floral induction in shoot buds.

What is the function of light in plants?

Phytochrome is:

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