Question

Archesporium of ovule is

• A. Single celled derived from nucellar epidermis
• B. Single celled derived from nucellar hypodermis
• C. Multicellular derived from nucellar epidermis
• D. Multicellular derived from nucellar hypodermis

Answer 1

Answer: (B)

Single celled derived from nucellar hypodermis

In the ovule or megasporangium, during the process of megasporogenesis, a hypodermal cell functions as a archesporium cell and becomes more prominent because of large size, denser cytoplasm and large nucleus. In tenuinucellate ovules, archesporial cell directly functions as megaspore mother cell while in crassinucellate ovules, archesporial cell divides periclinally to form an outer parietal cell and inner primary sporogenous cell that functions as megaspore mother cell.

Hence, a single hypodermal cell in the Nucellus functions as the archesporium.

So, the correct answer is B.