Upon germination in eudicot seeds, the hypocotyl undergoes specific changes that allow for the protection and growth of the plumule and radicle.
Upon germination in eudicot seeds, specifically epigeous eudicots, the hypocotyl is initially shaped like a hook with the plumule pointing downwards. This configuration, known as the plumule hook, protects the plumule during emergence through the soil. With exposure to light, the hypocotyl hook straightens out, and the epicotyl continues to elongate, while the radicle forms the primary root system.
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