epigeous germination
Quick Summary
Epigeal germination is a type of seed germination where the cotyledons (seed leaves) emerge from the seed and are raised above the ground by the elongation of the hypocotyl (the embryonic stem). This process typically involves the radicle (embryonic root) emerging first, followed by the hypocotyl. The cotyledons may then become photosynthetic, acting as the first leaves, or they may transfer stored nutrients to the developing seedling before degenerating. This contrasts with hypogeal germination, where the cotyledons remain below ground. Epigeal germination is common in plants like castor beans and garden beans.123
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