What are microsporogenesis and megasporogenesis?
Microsporogenesis
It is the process of formation of microspore from PMC (Pollen Mother Cells).
- As development occurs in the anther, the sporogenous tissue undergoes meiosis to form microspore tetrad.
Each cell of sporogenous tissue has capacity to give rise to a tetrad. Hence, each cell is a potential pollen or PMC.
As the anther matures, the microspores get detached from each other and develop into pollen grains.
Megasporogenesis
- Megasporogenesis is the process of formation of megaspores in the angiosperms.
The megaspore mother cell (MMC) gets converted into megaspores by the process of megasporogenesis.
The MMC is large and contains a dense cytoplasm and a prominent nucleus. It undergoes meiosis to produce four megaspores.
In most flowering plants, only one megaspore is functional while the other three degenerate.
The single functional megaspore develops into the female gametophyte.