Structural changes in the cell wall of meiocytes

10 p.-14 fig.This is a study, by electron microscopy, of the structure and possible function of a “dense wall” in the pollen mother-cells (PMC) after the last mitosis, carried out on Allium cepa anthers. On the formation of the “special callose wall”, the paper also describes the contribution of the membranes from vesicular elements to the formation of a new plasmalemma closely related to the “special callose wall”, and the formation of this layer from the inner contents of vesides which are of nuclear origin and other vesicular elements