Gravitropism

Gravitropism

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Credit: MARTIN SHIELDS/SCIENCE PHOTO LIBRARY

Caption: Corn, Zea mays, seedling recently germinated and illustrating gravitropism (geotropism). The seed was germinated in a sideways orientation and in the dark. Nevertheless, the root is curving and growing downwards (positive gravitropism) and the shoot upwards (negative gravitropism). The emerging plant oriented itself correctly without any cue from the sun - it responded to gravity.

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Keywords: angiosperm, auxin, background, biology, botanical, botany, clade monocot, clade monocots, coleoptile, corn, cotyledon, demo, demonstration, development, early, emergence, emerging, experiment, geotropic response, geotropism, germinate, germinating, germination, gravitropic response, gravitropism, gray, grey, growth, hormonal, hormone, maize, monocotyledon, monocotyledones, plant, response, response to gravity, root, seed, seed coat, seedling, shoot, sprout, sprouting, three, tropism, tropisms, zea, zea mays

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