Describe plasmogamy before karyogamy as observed in many fun

Describe \"plasmogamy before karyogamy\" as observed in many fungi.

Solution

The fusion of two or more cell or its protoplasts is called Plasmogamy. It occurs as the fusion of two cells protoplast but not eh nuclei. The cells retain the two nuclei intact. It occurs in the sexual reproductive cycle of Fungi wherein the two cells in a mycelium fuse to form a single cell with two nuclei (Dikaryotic Stage or n+n Dikaryon). Plasmogamy is normally followed by karyogamy. But the dikaryotic stage sometimes persists for many generations in Fungi before karyogamy.

The fusion of nuclei is called Karyogamy. It occurs during the fusion of two haploid eukaryotic cells. Karyogamy occurs in a cell with one complete copy of the original DNA after the fusion of the cell membrane and protoplast. After karyogamy, the cells often become diploid (2n diploid cell). This diploid cell is cell called a zygote which undergoes meiosis.