Megasporogenesis

Definition

Megasporogenesis is the process of formation and development of megaspores from megaspore mother cells through meiosis in ovules. It is a critical step in the female reproductive cycle of seed plants, leading to the formation of the embryo sac.

5 Must Know Facts For Your Next Test

1. Megasporogenesis occurs within the ovule of flowering plants.
2. It involves a meiotic division resulting in four haploid megaspores, but only one typically survives.
3. The surviving megaspore undergoes mitotic divisions to form the embryo sac.
4. Failure in megasporogenesis can result in female sterility and affect plant reproduction.
5. Megasporogenesis precedes megagametogenesis, where functional gametes develop.

Review Questions

Related terms

Megaspore Mother Cell: A diploid cell that undergoes meiosis to produce four haploid megaspores.

Embryo Sac: The female gametophyte formed from a surviving haploid megaspore during plant reproduction.

Megagametogenesis: The subsequent process where the functional haploid megaspore develops into the mature female gametophyte or embryo sac.