Fertilisation – Notes
Fertilisation and Post – Fertilisation Events
Syngamy or first fertilisation involves the fusion of one male gamete with the egg cell present in the egg apparatus that result in the formation of a diploid zygote.
Triple fusion involves the fusion of the other male gamete with the polar nuclei in the embryo sac that result in the formation of a triploid primary endosperm nucleus.
Syngamy and triple fusion together comprise double fertilisation, a phenomenon unique to flowering plants.
Double fertilisation is followed by the following post – fertilisation events.
- Degeneration of the antipodals and synergids
- Development of the zygote into an emryo
- Development of the central cell into primary endosperm cell, which eventually develops into endosperm.