1. Imbibition: The seed absorbs water, which causes it to swell and soften.
2. Radicle Emergence: The radicle, or embryonic root, emerges from the seed. It grows downwards, anchoring the plant and absorbing water and nutrients.
3. Hypocotyl Elongation: The hypocotyl, or stem below the cotyledons, elongates and pushes the cotyledons (seed leaves) upwards through the soil.
4. Cotyledon Expansion: The cotyledons unfold and become photosynthetic, providing energy for the seedling.
5. Epicotyl Elongation: The epicotyl, or stem above the cotyledons, elongates, developing true leaves and eventually producing flowers and fruits.
Here's a simplified breakdown:
* Root first: The root establishes itself before anything else.
* Stem follows: The stem pushes the seed leaves up.
* Seed leaves provide energy: The seed leaves, initially providing food, eventually give way to true leaves.
Important Notes:
* Not all plants follow this exactly: Some plants have different germination strategies. For example, some plants have hypogeal germination, where the cotyledons remain underground.
* Environmental factors matter: Temperature, moisture, and light can influence the speed and order of germination.
Let me know if you'd like to know more about specific plant species or the factors affecting germination!
