Pollen grain develop in the anthers of the staminae. They are formed from the anther of a stamen of a flowering plant. There are pollen sacs inside the anther. At the adult stage, pollen mother cells (2n) inside the pollen sacs produce four pollen spores (n) through meiosis from each.
Pollen grains signify the male segment of the reproductive procedure in plants and trees. Pollen grains are microscopic structures that differ in size and shape. Some are tiny orbs, while others are egg-shaped.
Pollen grains are microscopic structures that carry the male reproductive cell of plants. The inside of the grain contains cytoplasm along with the tube cell and the generative cell. The outer shell is made of two layers.
Characteristics of a pollen spore (n):
(i) Pollen spores are haploid and round in shapes
(ii) It is surrounded by two coverings of which the outer thick covering is called Exine and the inner layer is called Intine.
(iii) There is a round pore inside the germ pore of exine.
