The perisperm is derived from the nucellus of the ovule; this portion of the nucellar tissue is not consumed by the development of the embryo sac and persists after fertilization, becoming the main nutritive tissue of the seed (Figure 5A).

How is perisperm formed?

Perisperm develops from remnant of nucellus of the seed and the endosperm develops when the sperm cell fuses with two haploid polar nuclei (contained in the central cell) in the centre of the embryo sac (or ovule), resulting cell is triploid (3n) and triploid cell divides through mitosis and forms the endosperm, a ...

Where is perisperm found?

Perisperm appears to be reddish and has a paper-like composition. It is found in some seeds like that of beet and black pepper, coffee, etc. This perisperm remains persistent after the egg fertilization, surrounding the sac on the outer side of the embryo of a seed of some flowering plants.