Which pigment is responsible for absorbing light in photoperiodism?
Chlorophyll
Carotenoids
Phytochrome
Xanthophyll
Related Questions
With respect to photoperiodism, these are long day plants.
Plants that flower when the light period exceeds a critical length
Plants that flower when the dark period exceeds a critical length
Plants that flower regardless of the light period
Plants that flower when the temperature exceeds a critical threshold
The site of perception of light is
Root
Shoot
Leaves
Meristem
Short day plant is
Xanthium
Pisum
Cucumis
Avena
Phytochromes, the photoreceptors involved in photoperiodism, are predominantly located in which plant organ?
Roots
Leaves
Stem
Flowers
Coiling of garden pea tendrils around any support is an example of
Thigmotaxis
Thigmonasty
Thigmotropism
Thermotaxis
A long-day plant with a critical dark period of 9 hours is grown under short-day conditions. Which treatment is MOST LIKELY to induce flowering?
Increasing the ambient temperature during the dark period.
Spraying the plant with gibberellins during the light period.
Interrupting the dark period with a brief exposure to red light.
Exposing the plant to far-red light at the end of the dark period.
What helps in flowering?
Cytochrome
ABA
Phytochrome
Ethylene
The critical period in photoperiodism refers to the:
Minimum or maximum length of uninterrupted darkness required for flowering
Duration of light exposure needed for photosynthesis
Total length of the day-night cycle
Specific time of day when light is most effective
No correlation is observed between critical photoperiod and induction of flowering response in
Long day plant
Short day plant
Day neutral plant
Long-short day plant
