Class 11 Biology Plant Physiology Plant Growth and Development



In short day plant, flowering does not occur 
(a)
When intermediate light is given red far red red
(b)
When light period is interrupted by a flash of far light
(c)
When light period is interrupted by a flash red far light
(d)
All of the above
Correct answer: (a) 
Solution: Short day plants flower, when the length of daylight falls below a certain critical level. A short day plant requires a minimal length of uninterrupted darkness in each 24 hour period before floral development can begin. It has been determined experimentally that a short day plant does not flower if a dark period is interrupted by a brief exposure to a red light (660-665 nm wavelength. The inhibitory effect of the red light can be overcome by the subsequent exposure to the far red light (730-735 nm wavelength. However, if the light period is interrupted with red light, the flowering is not inhibited.

widgit image
Connecting you to a tutor in 60 seconds.
Get answers to your doubts.
play store logo
apple store logo
Similar topics
plant growth and development
respiration in plants
transport in plants
anatomy of flowering plants
photosynthesis in higher plants
widgit image
Connecting you to a tutor in 60 seconds.
Get answers to your doubts.
play store logo
apple store logo
plant growth and development
respiration in plants
transport in plants
anatomy of flowering plants
photosynthesis in higher plants