Figure 3.

Effect of DTT and nigericin on the time course of qN in wheat leaf tissue. Detached leaves were supplied with 3 mm DTT (○, •) (A) or 100 μm nigericin (○, •) (B) via the transpiration stream. Detached control leaves (□, ▪) were allowed to transpire in water. Subsequently, leaf tissue was incubated in the dark for 15 min at 25°C (○, □) or for 10 min at 25°C followed by 5 min at 37.5°C (•, ▪). After incubation, the time course of Chl fluorescence was measured at 25°C. Data points represent the mean ± se of two replications.