A Study of Vegetative Reproduction in Endomycopsis platypodis by Electron Microscopy

The hyphal cross-walls in Endomycopsis platypodis had dolipores and, depending on the conditions of growth, dolipores were sometimes present in the walls between budding cells also. The formation of walls, both in hyphae and between budding cells, was initiated by an electron-light primary wall. This was later thickened at both sides with electron-dense material, and the dolipore exhibited an extra swelling around the pore channel. Buds separated from their parents at the primary wall, which remained attached to the mother cell

A Comparative Study of the Cell Wall Structure of Basidiomycetous and Related Yeasts

The wall of basidiomycetous and related yeasts showed a lamellar structure in sections of both budding cells and hyphae fixed with potassium permanganate. The yeasts also had a typical way of bud formation and septation. These features differ from those recorded for ascomycetous yeasts. In the hyphae of some species septal pores were observed which were either dolipores or simple pores

Septal Pores in Endomycopsis platypodis and Endomycopsis monospora

In ultra thin sections of hyphae of the yeast species Endomycopsis platypodis and E. monospora septal pores were observed with the electron microscope. The pores are enclosed by a swelling of the cross-wall. Electron-dense bodies plug the pores; these bodies are surrounded by a membrane which is connected with the endoplasmic reticulum and which also connects the plugs at both sides of the cross-wall via the pore

An Electron Microscope Study of the Yeast Pityrosporum ovale

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.

A Comparative Study of the Cell Wall Structure of Basidiomycetous and Related Yeasts

The wall of basidiomycetous and related yeasts showed a lamellar structure in sections of both budding cells and hyphae fixed with potassium permanganate. The yeasts also had a typical way of bud formation and septation. These features differ from those recorded for ascomycetous yeasts. In the hyphae of some species septal pores were observed which were either dolipores or simple pores.

Conjugation in the Yeast Saccharomycopsis capsularis Schiönning

Cells of the yeast Saccharomycopsis capsularis fused in pairs after dissolving of part of the cross wall between them near the lateral wall. After nuclear migrations through the opening, the cross wall was closed again and the cells at both sides became asci. The wall of the ascospores developed from a prospore wall. Between the two unit membranes a very thin dark layer broadened to the dark layer of the wall and after that, the light inner layer developed. Immature spores in the strain studied had a ledge which disappeared during maturation.