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The presence of visible multilamellar bodies in the cytoplasm of pollen grains of at least seven species of the family Papaveraceae has led us to study the behaviour of these bodies during pollen-grain ontogeny and in growing pollen tubes of Sarcocapnos pulcherrima C. Morales & R. Garcia germinated in vitro. Our transmission-electron-microscope (TEM) studies in pollen grains show that the multilamellar...