Ref ID : 7562
Jean-Claude Esteve; [Particularite du Revetement Cellulaire chez le Cilie Paramecium caudatum, le Complexe Cytopharynx-sac Vacuolaire]. Protistologica XVI(2):305-314, 1980
Reprint
In File
Notes
At the ultrastructural level, with both conventional and cytochemical methods, it is shown that Paramecium caudatum and to a lesser extent P. aurelia have a local specialization of their cell coat at the plasmalemma of the naked ribbed wall and of the vacuolar sac. The coat is thinner than on the rest of the cell and, in P. caudatum, bears numerous granules. This peculiarity seems to be stable except at fission where, at least in the opisthe, it has to appear. As it is glycoproteic in nature, this coat plays an important part in two processes, flocculation and endocytosis of particles, forming a glue between them; it allows to understand the cohesion of flocculates and fecal balls in these ciliates. In relation to the recycling concept for membranes, the necessary renewal of these glycoproteins is considered.