Nutritive tissue of a seed derived from the nucellus and deposited external to the embryo sac —distinguished from endosperm. 2 : nutritive tissue of a seed that includes both endosperm and perisperm —not used technically.

Perisperm is present in Mango, Black pepper, and Guava.

What is Perisperm?
Perisperm is a type of nutritive tissue that is found in some seeds. It is derived from the nucellus, which is a part of the ovule. Perisperm serves as a source of nourishment for the developing embryo within the seed.

Perisperm in Mango:
Mango seeds possess a thick layer of perisperm surrounding the embryo. This perisperm is rich in starch and acts as a food reserve for the developing embryo during germination. As the embryo develops and grows, it utilizes the stored nutrients from the perisperm to fuel its growth.

Perisperm in Black Pepper:
Black pepper seeds also contain perisperm, which is commonly referred to as the "pepper pericarp." The perisperm in black pepper contains starch and oil, providing energy and nourishment to the developing embryo. It plays a crucial role in supporting the germination and growth of the seedling.

Perisperm in Guava:
Guava seeds have a fleshy perisperm surrounding the embryo. This perisperm is rich in carbohydrates and acts as a food source for the developing seedlings. It provides essential nutrients for the initial growth stages until the seedling can establish its own photosynthetic capabilities.

Conclusion:
In conclusion, perisperm is present in Mango, Black pepper, and Guava. It serves as a nutritive tissue that stores nutrients, primarily starch and carbohydrates, to support the growth and development of the embryo within the seed. The presence of perisperm ensures that the seedling has a reliable source of nourishment until it can sustain itself through photosynthesis.

Black pepper...