Study Material Page 3 of 24 | Reproductive Biology of Angiosperms | CUET (Common University Entrance Test) PG Botany (SCQP07) | Covers Complete Syllabus

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Mega-gametogenesis, another name for the process by which the female gametophyte (embryo sac) grows inside the ovule of flowering plants, is referred to as embryo sac development.
One megaspore mother cell (MMC) is initiated at the apex of each nucellus in flowering plants like Arabidopsis. The MMC creates four haploid megaspores during meiosis, but only one of these matures into a functioning megaspore; the other three degenerate.
A syncytial femal…

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The central cell is distinct from other gametophytic cells due to its central location, enormous volume, two polar nuclei, cytoplasm, and organelles that are inherited from the growing syncytial gametophyte.
It also has a big central vacuole at the chalazal end. In Arabidopsis, the polar nuclei fuse prior to fertilization, but not in cereals.
As a result, the central cell in most angiosperms is homodiploid $(2 n)$ an…

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