Question

Pollen grains in wheat are shed at "3-celled stage while in peas they are shed at 2-celled stage." Explain. Where are germ pores in a pollen grain?

Answer 1

In plants like peas, the microspores have two cells vegetative and generative. The vegetative cell has abundant reserve food material and a large nucleus which is irregular in shape while the generative stage is a spindle-shaped and are shed at the two-celled stage while in plants like wheat the generative cell divides mitotically and give rise to two male gametes before pollen grains are shed at the three-celled stage.