| 1. | Here the hypocotyl is a rudimentary axis between radicle and plumule.
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| 2. | Growth of the plumule does not occur until the cotyledons have grown above ground.
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| 3. | A . Seed Coat B . Cotyledon C . Hilum D . Plumule E . Radicle F . Endosperm
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| 4. | These seeds develop by the plumule growing up through the soil with the cotyledons remaining below the surface.
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| 5. | Fledglings are born with cryptic plumules that help them blend in with the surrounding ground material to avoid predation.
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| 6. | In most seeds, for example the sunflower, the plumule is a small conical structure without any leaf structure.
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| 7. | However, in seeds such as the broad bean, a leaf structure is visible on the plumule in the seed.
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| 8. | The plumule is the part of a seed embryo that develops into the shoot bearing the first true leaves of a plant.
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| 9. | It involves the reactivation of the metabolic pathways that lead to growth and the emergence of the radicle or seed root and plumule or shoot.
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| 10. | The coleoptile is a protective cap that covers the " plumule " ( precursor to the stem and leaves of the plant ).
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