Question

Define triple fusion. What is the product of this process? What does the product develop into?

Answer 1

Triple fusion:-

1. Triple fusion is a fusion that involves a sperm nucleus and two polar nuclei which occurs in the double fertilization in a seed-bearing plant that results in the endosperm formation.
2. The fusion process occurs in the embryo sac of the angiosperms.
3. In the event of fertilization, when the stigma comes in contact with the pollen grains, it germinates, giving rise to the pollen tube which enters the ovule through the style.
4. This pollen tube then enters into one of the synergids, post which two male gametes are released.
5. One of the two male gametes fuses with the nucleus of the egg cell to produce the zygote, this process is referred to as syngamy.
6. A primary endosperm nucleus, triploid in nature is formed when the other male gamete combines with the two polar nuclei that are located in the central cell.
7. Since the process involves the combining or fusing of three haploid nuclei, it is referred to as triple fusion.
8. The end result, outcome of the process of triple fusion is the formation of the endosperm.
9. Endosperm tissue is present inside the seeds of the flowering plants which is then used in the fertilization. It provides essential nutrients the in form of starch.