PLANT PHYSIOLOGY
PLANT GROWTH
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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put two plants in the freezer
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put two plants in a warm spot
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put one plant in a cold spot and one under a lamp
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put one plant near a window and one plant in a dark corner
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Detailed explanation-1: -One important light response in plants is phototropism, which involves growth toward-or away from-a light source. Positive phototropism is growth towards a light source; negative phototropism is growth away from light.
Detailed explanation-2: -A plants response to light has been well documented and studied. It is known to be due to differential elongation of the cells in the plant stem. Stem cells away from the light elongate in response to special auxins (growth hormones) causing the plant stem to bend towards the light.
Detailed explanation-3: -The potted plant which is kept near the window in the room, grows towards light. Auxins act on bending of stem to show a response towards the sunlight.
Detailed explanation-4: -Plant Physiology and Development Photoperiodism is the response to changes in daylength that enables plants to adapt to seasonal changes in their environment. The best studied example of photoperiodism in plants is flowering, but other responses to daylength include bud dormancy and bulb or tuber initiation.