Licht- und elektronenoptische Untersuchungen an Polystictus versicolor

Abstract

In the course of the formation of the clamp connection of Polvstictus versicolor the hyaloplasm of the tube region is subject to regular changes which in the living state are manifested by a change of its refractive index. The form of the substruture, on the basis of the variable external morphology of the clamp-connection outgrowth, is correlated with the successive temporal phases. Hyaloplasm with a high index of refraction is distinguished by an increased content of ribonucleoproteins. In the substructure image granular components prevail in the corresponding cell regions. Intraplasmatic direction of the substructural granula is probable. Intercellular displacement does not occur or only to a slight extent. The membranous elements of the endoplasmatic reticulum are variable in form, size and number. With increasing water content of the hyaloplasm the formation of large-lumened vesicles occurs. As a consequence of the extensive shifting of the nucleus-plasma-relation in favor of the nucleus in the non-fused clamp connection an intensive synthesis of cell proteins may be assumed. Accordingly, whether the clamp connection has the functional significance of a plasma reservoir is discussed.