How are Seeds and Fruits Formed in a Plant
Seeds and Fruits Formation in a Plant
Ripened ovule after fertilization is called seed. The seeds are the embryos of flowering plants in dormant stage. Seeds provide protection and nourishment to the embryo. A seed has three parts:
- i) Seed Coat: – Outmost covering is called testa and inner layer is called tegmen. Testa and tegmen form seed coat.
- ii) The Embryo: – Embryo is developed from zygote through mitosis It has three parts:
- A radicle is an embryonic bud which grows to form the stem.
- A plumule is an embryonic bud which grows to form the root.
- One or two Cotyledons store the food of endosperm in some seeds and become thick.
iii) Endosperm: – It is a food storing tissue when food is not stored in the cotyledons.
After fertilization ovary wall becomes fleshy or scaly and forms fruit. Fruit protect seed and help in dispersal of the plant.
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