Megasporangium

megasporangium a spore-bearing structure that bears megaspores that develop into megagametophytes Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...

megasporangium Sporangium that contains megaspores. megaspore Haploid cell produced by meiosis in the ovules of angiosperms; a single megasporocyte produces four megaspores, only one of which remains functional.

megasporangium The organ in which megaspores are formed. megaspore The larger of two types of spores produced by many ferns and seed plants.

which develop in the megasporangium and which will develop into the female gametophyte generation. Link to a discussion of the alternation of gametophyte and sporophyte generations Both types of sporangia are formed in flowers.

megasporocyte Special cell of the megasporangium called the megaspore mother cell. Covered in Lab 8 Seed Plant Reproduction ... Full article ...

nucellus (L. nucella, a small nut) Tissue composing the chief part of the young ovule in which the embryo sac develops; megasporangium.

the gnetophytes Gnetum and Welwitschia because the megagametophyte is reduced to just a few cells, one of which differentiates into the egg cell. The function of surrounding the gamete is assumed in large part by diploid cells of the megasporangium ...

See also: Cells, Plant, Ovule, Offspring, Stem