megasporangium

megasporangium

1. The megasporangium cells before fertilization.

受精前的大孢子囊细胞。

2. The central portion of an ovule in which the embryo sac develops;the megasporangium.

珠心胚珠的中心，胚芽囊在此发育;大孢子囊

3. The central portion of an ovule in which the embryo sac develops; the megasporangium.

珠心胚珠的中心，胚芽囊在此发育；大孢子囊

4. the megasporangium and surrounding integuments of a seed plant.

种子植物的大孢子囊及其周围的被层。

5. c. In this time period, the indehiscent integumented megasporangium (ovules/seeds) originated. It is represented in the sample by modern plants producing naked seeds on a scale.

胚珠或种子起始于此期间,开始出现在鳞片状叶上产生裸露种子的现代植物.