Figure 3. Light-induced reduction of Fe(III)CN damages the photosynthetic activity of the thylakoids.

(a) The residual photocurrent and DCPIP reduction obtained from thylakoids after incubation for 10 min in the dark (D) or in light (L), without (null) or with 3 mM Fe(III)CN or Fe(II)CN, normalized to a control experiment using identical thylakoids without incubation. The error bars represent the s.d. over five measurements. (b) Batch mode of operation wherein damaged thylakoids were replaced with fresh ones every 10 min. All the other cell components were reused.