Name: Germination of Seeds
Uploaded: 2019-07-19
Duration: 2 min 33 s
Description: Germination is the process by which an organism grows from a seed or similar structure. In this video, learn about germination and the factors affecting it.

Question

Outline the stages in the germination of maize grain seed with the help of a labelled diagram.

Accepted Answer

The stages of germination of maize grain seed involve various stages:
1. Water absorption: A dry maize seed starts the process by soaking in water from the surrounding soil. This water absorption causes the seed to enlarge, which in turn activates enzymes inside the seed.
2. Enzyme activation: Enzymes become active as the seed absorbs water. These enzymes convert the starch that has been stored in the seed into simpler sugars, which the growing seedling uses as energy.

3. Radicle emergence: The first root to sprout from a seed is called a radicle. It grows downward into the ground, anchoring the seedling and using the soil's water and minerals.
4. Plumule emergence: The plumule arises from the seed after the radicle. The coleoptiles, or initial leaves, and the embryonic shoot make up the plumule.

5. Emergence from soil: The sprout keeps getting longer until it finally breaks through the soil's surface. It can access light once it is above ground, which is necessary for photosynthesis.

Outline the stages in the germination of maize grain seed with the help of a labelled diagram.

Important Questions on Seed : Structure, Types and Germination

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