The process of formation of micro spores from pollen mother cell (2n) through meiosis.
Microsporangium is 4 layered:
Epidermis: single outer layer
Endothecium : dehiscence of anther
Middle layer : 2-4 layered,crushes when sporogenous tissue mature.
Tapetum : dense cytoplasm & multinucleate, Nourishes the developing pollen grain & formation of pollen wall,
Microspore mother cell (2n)
↓
Meiosis
↓
Microspore (n)
↓
Mitosis
↓
Pollen grains (n)
