Question

development of megasporangium

Answer 1

The ovule or the megasporangium develops as a small protuberance of the placental tissue. In the very young ovule a single hypodermal cell is differentiated as the archesporium.This archesporium cell may or may not cut off some parietal cells and then becomes the megaspore mother cell . The megaspore mother cell now undergoes meiosis or reduction division, and, usually, a linear row of four haploid megaspore cells (‘linear tetrad’) is formed.Thus megasporangium is developed from placenta.