Question

What is the function of pollen grains?

Answer 1

Pollen:

1. It is a powdery substance consisting of pollen grains, a male gamete, or a male microgamete of a seed plant that produces sperm cells.
2. Pollen grains have a hard shell of sporopollenin that protects the gametophyte during the transfer from the stamen to the pistil of the flowering plant or from the male cone of the conifer to the female cone.
3. Pollen itself is not a male gamete.
4. Each pollen grain contains vegetative germ cells, that is, non-germ cells and one germ cell or germ cell. In flowering plants, vegetative cells produce pollen tubes, which divide to form two sperm nuclei.
5. When pollen lands on a compatible pistil or female cone, pollen germinates, forming pollen tubes and transferring sperm to the ovule, which contains the female gametophyte.
6. Plant pollen is a cess of cross-pollination to transfer the monopoly male genetic material from a single flower anther to another flower stigma.
7. On the other hand, in self-pollination, this process takes place from the anther of the flower to the stigma of the same flower.
8. Pollen is rarely used as a food and as a dietary supplement.
9. It is contaminated with pesticides due to agricultural practices.
10. Their main function is to transfer male gametes to female gametes, the eggs of the embryo sac, thereby promoting the sexual reproduction of the plant.