About Lesson
Seed Germination
Germination is the process by which the seed develop into seedling.
It starts by imbibition i.e. absorption of water into the seed through the micropyle. This causes the seed to swell. The cells of the cotyledon become turgid and active. They start to make use of the water to dissolve and break down the food substances stored in the cotyledons. The soluble food is transported to the growing plumule and radicle. The plumule grows into a shoot while the radicle grows into a root. The radicle emerges from the seed through micropyle, bursting the seed coat.
The conditions necessary for Germination include:
(a) External Factors include
- Water
- Oxygen
- Optimum temperature
(b) Internal Factors include
- Enzymes
- Hormones
- Viability of the seed
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