How seeds germinate and grow

Article Catalog

2. Hydration and enzyme activation

3. The seed embryo breaks through the seed coat

4. Grow into seedlings

---

After the seeds encounter water, the hydrophilic substances inside will attract water molecules, causing the seed coat to soften or crack, and the permeability will increase. The cell wall of the seed will hydrate with the protoplasm, enzymes will also be activated, respiration and metabolism will increase, the size of the seed will increase, and the embryo and radicle will grow, and then roots, stems, and leaves will gradually grow to form seedlings.

2. Hydration and enzyme activation

1. Swelling

When seeds are germinating and growing, when the seeds are soaked in water or dropped into moist soil, the hydrophilic substances in the seeds will attract water molecules. The size of the seeds will increase rapidly. At the beginning of imbibition, water absorption will be relatively fast, and then it will gradually slow down. As a result of imbibition, the seed coat will become soft or ruptured, and the permeability of the seed coat to gases, etc. will increase, which will promote germination.

2. Hydration and enzyme activation

< p>When the water absorption stage of the seed is over, the cell wall of the seed will hydrate with the protoplasm, various enzymes in the seed will also begin to activate, and respiration and metabolism will increase sharply.

3. The seed embryo breaks through the seed coat

< p>The seed embryo will break through the seed coat and then increase in size. Most of the seeds will grow out of the radicle first and then the embryo.

4. Grow into seedlings

After the seeds grow into radicles and embryos, they will gradually grow roots, stems, leaves, and then form seedlings.

3. The seed embryo breaks through the seed coat

4. Grow into seedlings

- END -