Limp condition after
lying in salt
solution.
Fig. 22.
Rigid again after
lying again in water.
Figs. 20-22.—Turgor and osmosis in slices of beet.
33. Let us now remove some of the slices of the beet from the sugar and salt solutions, wash them with water and then immerse them in fresh water. In the course of thirty minutes to one hour, if we examine them again, we find that they have regained, partly or completely, their rigidity. Here again we infer from the former experiment with spirogyra that the substances in the cell-sap now draw water inward; that is, the diffusion current is inward through the cell walls and the protoplasmic membrane, and the tissue becomes turgid again.
Fig. 23.
Before treatment with
salt solution.
