Open arrows point to vesicles between plasmalemma and secondary wall. In the older cell, the secondary wall is marked swl, in the younger sw22. Stars indicate membrane-bound vesicles one of which appears as a bleb from the plasmalemma. Body with small vesicles at bv. In the older cell, the primary wall is partly hydrolyzed and some protoplast residue coats the secondary wall.
Open arrows indicate extent of connection between primary and secondary walls.
Vessel member above, parenchyma cell below. The primary wall is partly hydrolyzed in the vessel member. Protoplasmic residue covers the secondary and hydrolyzed primary wall. The wide spaces between the sections of the cells indicate that the cell had undergone considerable stretching. In the vessel member to the right the degradation of the primary wall is almost complete and cytoplasmic residue is left in the cell.