Photoperiodism
Photoperiodism: Overview
This topic covers concepts such as Florigen Hypothesis, Photoperiodism, Long Day Plants, Short Day Plants, Day Neutral Plants, Critical Day Length, Critical Dark Period, and Photoperiodic Induction.
Important Questions on Photoperiodism
Florigen results in conversion of:
The site of perception of light in plants during photoperiodism is:
Assertion : Dark period play more important part in flowering than light period.
Reason : Flowering occurs in short-day plant if the dark period is interrupted by light break.
Assertion : Photomodulation of flowering is phytochrome-regulated process.
Reason : Active form of phytochrome (Pfr) directly induces floral induction in shoot buds.
Which one of the following statements is true for the phytochrome
What will be the effect on phytochrome in a plant subjected to continuous red light
The photoperiod in plants is perceived at
Chrysanthemum flowers either in winter season or in evening because it is a
The wavelength of light absorbed by Pr form of phytochrome is _____
Proteinaceous pigment which is the centre of activities concerned with light is
Which of the following is a long day plant
With respect to photoperiodism, these are long day plant
In short day plants (SDP), flowering is induced by
A hypothetical chemical involved in the flowering of plants is or Chemical agent which has important role in flowering is
The term "photoperiodism" was proposed by or The phenomenon of photoperiodism in plants was discovered by
In SDP flowering does not occur
One set of a plant was grown at 12 hours day and 12 hours night period cycles, and it flowered while in the other set night phase was interrupted by flash of light, and it did not produce flower. Under which one of the following categories will you place this plant
