Question

Write about microgametogenesis ????

Answer 1

➡️ The process of formation of male gametophyte from a Pollen Grain or a microscope is called microgametogenesis.

➡️ The development of male gametophyte is completed inside the anther and a part of development occurs on the stigma after pollination .

➡️ The nucleus of the Pollen Grain divides mitotically to form a vegetative nucleus and generative nucleus .

➡️ Then the generative nucleus surrounded by cytoplasm and become generative cell .

➡️ At this stage, Pollen Grain is 2 celled, I.e. a large vegetative cell and small generating cell .

➡️ The Pollen Grain may be discharged from the anther at this 2 celled stage.

➡️ In some plants generative cell divides and produce two male gametes before the pollen grains are shed.

➡️ These pollen grains are 3 celled at the time of shedding .