An electron microscope study of the yeast Pityrosporum ovale

Summary Cells of Pityrosporum ovale were prepared for electron microscopy by different methods of fixation and embedding, all of them causing some degree of damage to the cells. Apart from the usual organelles seen in other yeast cells, a body was found which showed an electron-dense outer layer and an electron-light centre when stained with permanganate. The cell wall showed layers of different electron-density. Buds were formed at one pole only, leaving a collar on the mother cell.