Inactive Tutor answered • 02/28/23
After the zygote is formed, it undergoes a process called embryogenesis, during which it develops into an embryo within the ovule of the flower. The embryo consists of three main parts: the radicle, the plumule, and the hypocotyl.
The radicle is the embryonic root, which emerges from the seed first and anchors the plant in the soil. The plumule is the embryonic shoot, which emerges after the radicle and gives rise to the stem and leaves. The hypocotyl is the embryonic stem, which connects the radicle and the plumule.
As the embryo develops, it is surrounded by the endosperm, which provides nutrients for the growing embryo. The endosperm is the result of the fusion of the sperm cell with the two polar nuclei of the central cell in the ovule.
Eventually, the embryo and endosperm are enclosed by a protective layer called the seed coat. The seed coat develops from the outer layer of the ovule, and it helps to protect the embryo and endosperm from damage and desiccation.
In dicotyledonous plants, the embryo has two cotyledons, which are structures that serve as the first leaves of the plant. The cotyledons are usually the largest structures in the mature seed, and they contain stored food that provides energy for the developing seedling until it can produce its own food through photosynthesis.
Overall, the formation of the seed is a complex process that involves the development of the embryo, endosperm, cotyledons, and seed coat. These structures work together to protect and nourish the developing plant until it can grow and produce its own food.
