After fertilization, a series of changes takes place in the flower. The diploid zygote divides and redivides by mitosis to form a multicellular embryo.
The endosperm develops from the Primary Endospermic Nucleus (PEN). The ovules mature to form seeds and ovary develops into fruit.
The post-fertilization changes include:
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Formation of embryo.
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Formation of endosperm.
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Disorganization of nucellus.
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Formation of seed.
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Formation of fruit.
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Calyx, Corolla, Androecium and Style get dried and fall off.
Fate of different parts of a flower post-fertilization
|
No.
|
Before fertilization
|
After fertilization
|
|
1.
|
Ovary
|
Fruit
|
|
2.
|
Ovary wall
|
Pericarp (wall of fruit)
|
|
3.
|
Ovule
|
Seed
|
|
4.
|
Inner integument
|
Tegmen (Inner seed coat)
|
|
5.
|
Outer integument
|
Testa (Outer seed coat)
|
|
6.
|
Funicle
|
Stalk of seed
|
|
7.
|
Egg
|
Embryo
|
|
8.
|
Secondary nucleus (2n)
|
Primary Endospermic nucleus / Endosperm (3n)
|
|
9.
|
Antipodal cells
|
Degenerate
|
|
10.
|
Synergids
|
Degenerate
|
|
11.
|
Nucellus
|
Perisperm
|
|
12.
|
Hilum
|
Scar
|
