Answer in Brief
Long Answer Question:
Explain the stages involved in the maturation of microspore into a male gametophyte.
Development of male gametophyte
- Pollen grain/microspore marks the beginning of male gametophyte, thus it is the first cell of the male gametophyte.
- It undergoes the first mitotic division to produce bigger, naked vegetative cells and small, thin-walled generative cells.
- The vegetative cell is rich in food and having an irregularly shaped nucleus.
- The generative cell floats in the cytoplasm of the vegetative cells.
- The second mitotic division is concerned with generative cells only and gives rise to two non-motile male gametes.
- The mitotic division of the generative cells takes place either in the pollen grain or in the pollen tube.
- The pollen grains are shed from the anther, at this two-celled stage in most of the angiosperms.
Concept: Pre-fertilization in Plant: Microsporangium
Is there an error in this question or solution?