Question

What is the function of a germ pore in a pollen grain?

Answer 1

Pollen grain:

1. Pollen grains are small structures that contain androecium, a flower's male reproductive organ.
2. The pollen grain's inner region comprises cytoplasm, as well as the tube cell, which transforms into a pollen tube, and the generative cell, which releases the sperm nuclei.

Germ pore:

1. A germ pore is a hole on the outer wall of a spore or pollen grain through which the germ tube or pollen tube emerges during germination.
2. The germ pore is the area of the pollen grain's exine layer where sporopollenin is not present.
3. In dicotyledons, there are three germ holes called the tricolpate, whereas monocotyledons only have one germ pore called the monocolpate.
4. The germ pore is primarily responsible for the formation of pollen tubes.
5. It also plays a part in the release of male gametes during fertilisation.