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Phototropism

Phototropism

C028/7032

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Credit

MARTIN SHIELDS / SCIENCE PHOTO LIBRARY MARTIN SHIELDS / SCIENCE PHOTO LIBRARY

Caption

Phototropism is a directional plant response to light. Plant shoots (stems) exhibit positive phototropism by growing towards a light source. This sunflower seedling, Helianthus annuus, is bending towards the sun because auxin hormones released into the far (dark) side of the stem cause elongation on that side.

Release details

Model release not required. Property release not required.

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