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What is phototropism?

April 26, 2017phototropism

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What is phototropism?

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Phototropism describes the process by which plants respond to the light in their environment. The light-sensing hormone responsible for the curvature of plant shoots towards light is auxin. Upon release from the cells in the apical meristem, auxin collects primarily on the darker side of the stem and stimulates cell elongation. Thus, the cells on the side not directly exposed to light will grow much faster than the opposing side, and the stem will curve towards the light source.