PLANT PHYSIOLOGY
PLANT GROWTH
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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gravity
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light
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changes in temperature
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water
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Detailed explanation-1: -Phototropism: Phototropism is the property of the plant to react to light stimulus.
Detailed explanation-2: -The flowers of Oxalis open during the day and close at night, such type of movement is. No worries!
Detailed explanation-3: -Note: In succulent plants stomata close at night and open in day time because there is no sunlight at night for photosynthesis.
Detailed explanation-4: -Example 2: When light hits outer flower petals it triggers a chemical called auxin that causes cells to grow and expand. This causes to flower opens. But because its inner petals are less exposed to light, those cells remain the same and cause the flower to close once light is gone.
Detailed explanation-5: -The movement of flower during opening and closing is a type of nastic movement. Tactic movements are locomotive movements that are triggered by other unidirectional external stimuli.