Credit: DENNIS KUNKEL MICROSCOPY/SCIENCE PHOTO LIBRARY

Caption: Radish seed germination (Raphanus sativus), animated coloured scanning electron micrograph (SEM). Root with close-up of root hairs. Seed germination is the growth of a plant contained within a seed. Seed germination depends on both internal and external conditions. The most important external factors include: right temperature, water, oxygen and sometimes light or darkness. The part of the plant that first emerges from the seed is called the embryonic root (also called the radicle or primary root). Root hairs are produced on the primary root in order to start water absorption. After the root absorbs water an embryonic shoot emerges from the seed. This shoot comprises three main parts: the cotyledons (seed leaves), the section of shoot below the cotyledons (hypocotyl), and the section of shoot above the cotyledons (epicotyl). The way the shoot emerges differs among plant groups.

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Keywords: 98344a, animated, animation, brassicaceae, brassicales, cabbage family, colored, coloured, crucifers, digital, embryonic root, embryonic roots, false-colored, false-coloured, ken burns effect, mustard, mustards, plumule, primary root, primary roots, radicle, raphanus, root, root bacteria, root bacterium, rosid, rosids, rostrum, scanning electron micrograph, seed coat, seed germination, seed germinations, seed plumule, seed radicle, seed root, seed root hair, seed root hairs, seed roots, seeds, sem, soil bacteria, soil bacterium

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Radish seed root hairs Raphanus sativus, SEM

K006/9304 Rights Managed

Downloadable master

Duration: 00:00:10

Frame size: 1920x1080

Frame rate: 25

Audio: No

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

File size: 330.0M

Original

Capture format: Digital Rostrum

Frame size: 2646x3302

Codec: JPEG

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