Question

Differentiate between perisperm and endosperm giving one example each.

Answer 1

Hint: In some seeds, such as black pepper and beet remnants of nucellus are also persistent. This residual persistent nucellus is perisperm while the part of a seed that acts as a food store for the developing plant embryo, containing starch with protein and other nutrients are endosperm.

Complete answer:

Perisperm	Endosperm
It represents persistent remains of nucellus (of ovule) to the seed.	It develops from the primary endosperm nucleus.
It is a part that belongs to seed.	It contains reserve food materials.
It is usually dry.	It is usually in fluid form.
It is the diploid food storage tissue originating from nucellus.	It is the triploid food storage tissue originating from triple fusion.
It is diploid in nature.	It is triploid in nature.
Example: Black pepper	Example: Wheat.

Perisperm is the nutritive tissue derived from the nucellus that surrounds the embryo of seed in some angiosperm. Seeds in which both endosperm, as well as perisperm, are present are commonly called as albuminous or in which neither endosperm nor perisperm exists are termed as exalbuminous or ex endospermic. The solitary seed has no perisperm or albumen but has two large cotyledons concealing the plumule. Germination is slow when there is a storage of food available in the perisperm or in the endosperm or in the embryo itself.

Note: The endosperm is a tissue which is present inside the seeds of flowering plants following fertilization. In seeds of flowering plants, the embryo is surrounded by a nutritive tissue called endosperm.