Caption: Phototropism, animation. Plant growth towards a light source is known as positive phototropism. At left the light source is directly above the growing shoot. The hormone auxin (red) is equally distributed throughout the shoot and it grows straight. At right the light source is coming from the right. This causes an increase in the concentration of auxin on the side of the shoot that receives less light (the left). The increased concentration of auxin causes the cells on the left to elongate, leading to a bending of the stem towards the light.

Release details: Model release not required. Property release not required.

Keywords: animated, animation, auxin, bending, biological, biology, black background, botanical, botany, coleoptile, darwin's experiment, darwins experiment, experiment, external stimulus, flora, growing, hormonal, light, nature, no-one, nobody, phototropic, phototropism, plant, plant hormone, positive phototropism, response, school science, shoot, stem, tropism

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Phototropism, animation

K004/3661 Rights Managed

Downloadable master

Duration: 00:00:20

Frame size: 1920x1080

Frame rate: 25

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 75.4M


Capture format: QuickTime Animation

Codec: H.264

Please contact Science Photo Library if you require the original, or other formats.


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