Germinating seed, SEM
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Germinating seed, SEM
Germinating seed. Coloured scanning electron micrograph (SEM) of the main stages in the germination of a plant seed. The sequence runs from left to right. The first two images show the emergence of the radicle (white), the embryonic root, from the seed coat (testa, brown). In the third image, the root grows downwards in response to gravity (geotropism), while in the fourth image the embryonic shoot (plumule) grows up against gravity. Its seed leaves (cotyledons, green) will photosynthesise using sunlight. The root hairs will help obtain water and nutrients. This is a swede (Brassica napus) seedling. For a sequence of seed germination, see images B787/394-397
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 9194627
© POWER AND SYRED/SCIENCE PHOTO LIBRARY
Brassica Napus Cotyledon Cotyledons Dicot Embryo Embryonic Geotropism Germinating Germination Growing Hair Hairs Late Quartet Radicle Reproduction Reproductive Root Seed Seedling Sequence Shoot Stage Swede Testa
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