Write about microgametogenesis ????
Answers
➡️ 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 .