What is double fertilization
In flowering plants, two nuclei from the pollen grain participate in the events of fertilization. With which nuclei from the female gametophyte do these nuclei combine? What tissues are formed from the fertilization events?
Two nuclei from the pollen grain combine with egg and the polar nuclei from the female gametophyte and forms the sporophyte and triploid endosperm respectively.
In flowering plants, fertilization is known as double fertilization because two male nuclei from the pollen grain fuses with the egg and polar nuclei and forms diploid zygote and triploid endosperm respectively.
The pollen nucleus fuses that with egg nucleus forms zygote that develops into an embryo and then to a sporophyte.
The other pollen nucleus combines with two nuclei in the female gametophyte and forms triploid nucleus. It develops into a triploid tissue called as endosperm.
Endosperm nourishes the developing embryo of plant.
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