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A seedling is a young plant grown from a seed. Its early development begins with the emergence of the primary root from the seed, followed by cell division and organ formation. Initially, the seedling relies on stored reserves within the seed, such as in the endosperm or cotyledons, for nourishment. These reserves are mobilized by enzymes to fuel growth.12

Environmental factors like gravity and light significantly influence a seedling's development and orientation. The root typically grows downward (positively geotropic), while the shoot grows upward (negatively geotropic) and towards light (positively phototropic). Seedlings can undergo either hypogeal (belowground) or epigeal (aboveground) germination, depending on whether the cotyledons emerge from the seed. Eventually, the seedling becomes self-supporting through photosynthesis and develops into a mature plant.23

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