How does phototropism occur in plants?
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Phototropism is the growth of an organism in response to a light stimulus. ... The cells on the plant that are farthest from the light have a chemical called auxin that reacts when phototropism occurs. This causes the plant to have elongated cells on the furthest side from the light.
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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.
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