Formation of male gametes from a pollen spore:
Formation of male gametes: Plants utilize meiosis to create spores. In the anthers of a flower, definite diploid cells undergo meiosis, forming haploid spores (called microspores—”little spores”). These microspores separate by mitosis to form two-celled pollen, consisting of a tube cell and a generative cell.
Gametes can be explains as sex cells of plants. Like humans, plants have sperm and egg cells that need to combine in order to generate a zygote, or fertilized egg. Unlike humans, however, plants produce both types of these cells.
- The nucleus of a pollen spore produces two nuclei by mitosis.
- The bigger nucleus is called tube nucleus and the smaller nucleus known as reproductive nucleus.
- If the pollen reaches a receptive stigma (female plant part), the pollen germinates. The generative cell divides by mitosis to form two sperm; the tube cell elongates to form the pollen tube.
