Stimulation plasmolysis on marine algae

Abstract

         1. The bibliography of stimulation plasmolysis (»Reizplasmolyse«) is summarised.

         2. Stimulation plasmolysis in the cells of Striatella unipunctata, Rhipidiophora, Bryopsis, Pseudobryopsis is described.

         3. The best method of inducing chemical stimulation of Striatella for this type of »plasmolysis« is vital stainig. The proto­plasm reacts although the vacuole alone appears to take up the dye.

         4. Wound plasmolysis and some similar phenomena of coa­gulation of the protoplast in the trichomes of marine algae are described.

         5. Stimulation plasmolysis of intact cells must be distin­guished from wound plasmolysis of cut cells.

         6. As a possible explanation of the contraction of the proto­plast in stimulation plasmolysis a sudden increase in permeability is suggested.