Sucrose biosynthesis in Dunaliella : III. Regulation by a membrane change.

The temperature dependence of membrane fluidity has been studied by means of spin labeling of intact Dunaliella cells, in the presence of different NaCl concentrations. The obtained data support the proposed hypothesis that the permeability of the chloroplast envelope to fructose-6-phosphate at higher temperatures in the basic regulatory mechanism for sucrose synthesis in Dunaliella.