Question

Arrangement of four wall layers in microsporangium
from inside to outside is as follows:

• A. Epidermis, middle layers, endothecium and tapetum
• B. Tapetum, middle layers, endothecium and epidermis
• C. Epidermis, endothecium, tapetum and middle layers
• D. Epidermis, endothecium, middle layers and tapetum

Answer 1

The correct option is B Tapetum, middle layers, endothecium and epidermis

Microsporangia are parts of the anther where microspores are produced.

In a transverse section a typical microsporangium ap-
pears near circular in outline.

It is generally surrounded by four wall layers the epi-
dermis, endothecium, middle layers and the tapetum.

Epidermis, endothecium and middle layers have protective functions and help in dehiscence of pollen grains.

Tapetum provides nourishment to the developing pollen grains.