Question

The aleurone layer occurs in the peripheral region of
(A) Endosperm
(B) Coleoptile
(C) Cotyledon
(D) Coleorhiza

Answer 1

Hint: The aleurone is a translucent single-cell layer with subcellular elements that are identical to those found in cotyledonary tissue.

Complete answer:
Let us look into the given options:
Option (A) Endosperm: The aleurone layer, one of the two main cell types of the endosperm, is often referred to by this name. The outermost layer of the endosperm is the aleurone layer, which is succeeded by the inner starchy endosperm. The peripheral endosperm is the name given to this layer of cells. It is located between the pericarp and the endosperm's hyaline layer. Hence, option (A) is correct.

Option (B) Coleoptile: A conical defensive sheath called the coleoptile surrounds the plumule. It has the ability to expand and protect the growing shoot top.
Hence, option (B) is incorrect.

Option (C) Cotyledon: An upper shield-shaped scutellum, which is essentially a shortened cotyledon, makes up the embryo. Hence, option (C) is incorrect.

Option (D) Coleorhiza: A defensive sheath called coleorhiza surrounds the radicle.
Hence, option (D) is incorrect.

Therefore, the correct answer is option (A) Endosperm.

Note: Both the growing seed and the mature plant depend on the aleurone layer. Significant amounts of oils and lipids collect in the aleurone tissue, which are useful during seed growth. It also serves as a mineral storage site and, in some plants, as a seed dormancy site. PR-4 is one of several pathogen-protective proteins that the aleurone can express. In several brans, aleurone is the most nutritionally useful fraction. The aleurone tissue also includes a large number of protein-storage vacuoles known as protein bodies.