Figure 5
From: Na+-stimulated phosphate uptake system in Synechocystis sp. PCC 6803 with Pst1 as a main transporter
Effect of salt stress and osmolality stress on the initial rates of phosphate uptake in Synechocystis sp. PCC 6803. The 24 h cells grown in Pi-limiting medium were washed and resuspended in 25 mM HEPES/KOH buffer pH 7.5 containing NaCl (circles), NaCl and sorbitol to keep osmolality equivalent to 100 mOsm • kg-1 (triangles), and sorbitol (squares). After 2 h incubation, aliquots were taken for assays of Pi uptake.