Phototropism definition

fō-tŏtrə-pĭzəm, fōtō-trō-
Growth or movement of a sessile organism toward or away from a source of light.
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The growth or movement of a fixed organism toward or away from light. In plants, phototropism is a response to blue wavelengths of light and is caused by a redistribution of auxin from the illuminated side to the darker side of the shoot, resulting in quicker growth on the darker side and bending of the shoot toward the source of light. Certain sessile invertebrates also exhibit phototropism.
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Growth or movement of a sessile organism toward or away from a source of light.
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Any movement of a part of a plant toward or away from light sources.
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(biology) The movement of a plant towards or away from light.
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