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Heliotropism vs. Phototropism

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Heliotropismnoun

The property of some plants of turning under the influence of light; either positively (towards the light) or negatively (away from the light)

Phototropismnoun

(biology) the movement of a plant towards or away from light

Heliotropismnoun

The phenomenon of turning toward the light, seen in many leaves and flowers.

Phototropismnoun

The tendency of growing plant organs to move or curve under the influence of light. In ordinary use the term is practically synonymous with heliotropism.

Heliotropismnoun

an orienting response to the sun

Phototropismnoun

exhibiting movement in a direction toward (positive phototropism) or away from (negative phototropism) a source of light.

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Heliotropism

Heliotropism, a form of tropism, is the diurnal or seasonal motion of plant parts (flowers or leaves) in response to the direction of the Sun. The habit of some plants to move in the direction of the Sun, a form of tropism, was already known by the Ancient Greeks.

Phototropismnoun

an orienting response to light

Phototropism

Phototropism is the growth of an organism in response to a light stimulus. Phototropism is most often observed in plants, but can also occur in other organisms such as fungi.

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