Fig. 1From: Calreticulin expression and localization in relation to exchangeable Ca2+ during pollen development in PetuniaScheme of microsporo/gametogenesis in angiosperms. Cartoons represent cross sections of the tetrasporangiate Petunia anther (a), microsporocyte (Msc) stage (b), callose (Msc/Ca) stage (c), dyad/tetrad (Dy/Te) stage (d), early microspore (MspE) stage (e), late microspore (MspL) stage (f), and pollen grain (Pg) stage (g). Aw anther wall, Ta tapetumBack to article page