Photoperiodism
Photoperiodism: Overview
This Topic covers sub-topics such as Photoperiodism, Short Day Plants, Long Day Plants, Day Neutral Plants, Critical Day Length, Photoperiodic Induction, Critical Dark Period and, Florigen Hypothesis
Important Questions on Photoperiodism
Florigen results in conversion of:
The site of perception of light in plants during photoperiodism is:
In photoperiodism, the site of perception of light/dark duration is -
Identify the wrong statements in the following?
(A) Winter varieties when planted in spring normally comes to flower before growing season
(B) In short day plants above critical photoperiod flowering will be initiated
(C) Kinetin has specific effect on cytokinesis which is a modified purine
(D) Auxins are used as herbicides
The correct answer is:
A plant has first given far-red light and after some time red light is also given to it at night and flowering occurs in it then that plant is:-
If the dark phase of a short day plant is intrupted by a flash of light then
The inhibitory effect of red light on flowering during critical dark period in short day plants can be overcome by
Photoperiodism affects which of the following processes?
If the exposure of red light is immediately followed by far-red light, the flowering is
Which of the following is day neutral plant?
Pigment taking part in photo-perception of flowering is
Photoperiodic stimulus is perceived by
A chemical believed to be involved in flowering is
In many plants, the change from vegetative to reproductive phase takes place in response to
When the dark period of short day plants is interrupted by a brief exposure of light, the plant
Photoperiod affects reproduction in seasonal breeders of:
