PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a change in the growth of a plant in response to water
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a change in the growth of a plant in response to touch
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a change in the growth of a plant in response to light
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a change in the growth of a plant in response to gravity
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Detailed explanation-1: -In phototropism a plant bends or grows directionally in response to light. Shoots usually move towards the light; roots usually move away from it. In photoperiodism flowering and other developmental processes are regulated in response to the photoperiod, or day length.
Detailed explanation-2: -Phototropism, or the differential cell elongation exhibited by a plant organ in response to directional blue light, provides the plant with a means to optimize photosynthetic light capture in the aerial portion and water and nutrient acquisition in the roots.
Detailed explanation-3: -Phototropism is the phenomenon by which the plant bends in the direction of light. Light is required by the plants to stimulate energy production by the process of photosynthesis.
Detailed explanation-4: -(a) The growth of plant parts in response to light is known as phototropism. An example of phototropism is the growth of plant stem in the upward direction in response to sunlight. (b) The stems of plants grow towards sunlight showing positive phototropism.
Detailed explanation-5: -Phototropism is the directional response of a plant that allows the plant to grow towards or in some cases away from the light. Process of phototropism: Leaf tips and stem tips have a hormone called auxin which is sensitive to light. It allows the plant to positively grow towards the light source.