What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion
Explanation The endosperm is responsible for providing nutrition to the developing embryo. Two sperm nuclei proceed into the female gametophyte. The zygote is formed by the fusion of the egg cell with one of the sperm nucleus. The other sperm nucleus, on fusing with the central cell, forms the primary endosperm nucleus. This process is called triple fusion because it involves the fusion of three nuclei; one of the sperm nuclei and the other two of the central cell. The nucleus thus formed is called a triple fusion nucleus. Triple fusion occurs within the embryo sac. One sperm nuclei and two polar nuclei are involved in triple fusion. Final answer When the pollen grains reach the stigma, they germinate to form a pollen tube. This pollen tube enters into the style and the nucleus, on division, forms two nuclei: the generative nucleus and the tube nucleus. The generative nucleus further divides forming two sperm nuclei. The two sperm nuclei fuse with egg cell and the central cell each, producing a zygote and an endosperm primary cell, respectively.
