Question

During the development of anther wall layers, if inner secondary parietal layer differentiates into tapetum and the outer secondary parietal layer divides producing endothecium and middle layer, the development of anther wall layers would confirm to .................

• A. Basic type
• B. Monocot and gymnosperm type
• C. Dicot type
• D. None of the above

Answer 1

The correct option is A Basic type

In the basic type of wall formation, all the cells in the secondary parietal layers divide once periclinally, forming four new layers. These layers differentiate, from outside to inside, into the endothecium, the two middle layers and the tapetum. The dicotyledonous type differs from the basic type in that only the outer secondary parietal cell layer divides periclinally. As a consequence only three layers are formed; the endothecium, one middlelayer and the tapetum. The endothecium and the middle layer are formed from the outer secondary parietal later and the tapetum is formed from the inner secondary parietal layer.