Cycas। Development of female gametophyte। B.Sc.bio.। by Surabhi ma'am

Welcome to the Biology Concept channel. The development of the female gametophyte in Cycas occurs within the ovule and begins from the functional megaspore formed after meiosis in the megaspore mother cell. Out of four megaspores, only one remains functional while the others degenerate. The functional megaspore enlarges and undergoes repeated free-nuclear divisions, producing a multinucleate structure. Later, cell wall formation occurs, converting the multinucleate mass into a cellular female gametophyte known as the endosperm. This gametophyte serves as a nutritive tissue for the developing embryo. At the micropylar end, a few cells differentiate to form archegonia, each containing a large egg cell. Thus, the female gametophyte of Cycas is haploid, multicellular, and endospermic, supporting fertilization and embryonic development. This process represents a key evolutionary feature of gymnosperms. #FemaleGametophyte #Cycas #Gymnosperms #PlantReproduction #MegasporeDevelopment #OvuleStructure #Archegonia #EndospermFormation #BScBiology #PlantEmbryology #BotanyNotes #SeedPlants #LifeCycleOfCycas #PlantDevelopment #ExamReadyNotes