Studies of spermatogenesis in the Hepaticae. 3. Continuity between plasma membrane and nuclear envelope in androgonial cells of Blasia.


An ultrastructural study of late-stage androgonial cells of Blasia pusilla, a thallose liverwort, showed the nearly spherical nuclei often lying close or appressed to the cell walls. In some cells the two membranes comprising the nuclear envelope separated, the inner membrane continuing intact as a limiting boundary of the nucleus and the membrane on the… (More)