Plasmogamy is a stage in the sexual reproduction of fungi. In this stage, the cytoplasm of two parent mycelia fuse together without the fusion of nuclei, as occurs in higher terrestrial fungi. After plasmogamy occurs, the secondary mycelium forms. The secondary mycelium consists of dikaryotic cells, one nucleus from each of the parent mycelia. It is the fusion of protoplasm between two motile or non-motile gametes. It involves the union of two protoplast bringing two haploid nuclei close together in the same cell.