Dear student,
Microsporogenesis -
Anther contains four microsporangia and each microsporangia has sporogenous tissue in the middle. Cells of sporogenous tissue performs meiotic division to form four microspore tetrad cell. Cells of sporogenous tissue are microspore mother cell. This process of formation of pollen from microspore mother cell is called microsporogenesis. After attaining maturity microspore tetrad dehydrates and separate from each other forming pollen grain.
Regards