Fig. 2
From: Salt adaptability in a halophytic soybean (Glycine soja) involves photosystems coordination
Transients of prompt chlorophyll a fluorescence a, b, modulated 820 nm reflection c, d, and delayed chlorophyll a fluorescence e, f in Glycine max (circles) and Glycine soja (triangles) exposed to 0 (closed symbols) and 300 mM (open symbols) NaCl for 3 (left panels) and 9 (right panels) days. O, K, J, I and P indicate the specific steps in chlorophyll a fluorescence transient. MR0 is the value of modulated 820 nm reflection at the onset of red light illumination (0.7 ms, the first reliable MR measurement). MR0-MRmin and MRmax-MRmin were PSI oxidation and re-reduction amplitude, respectively. The data of MR0-MRmin and MRmax-MRmin indicate mean of five replicates (±SD), and different letters on error bars indicate significant difference at P < 0.05. Do, I1, I2, D2 indicate initial point, the first (7 ms) and second (50 ms) maximal peaks and minimum point in delayed chlorophyll a fluorescence curves. DF0.3ms is the initial microsecond delayed fluorescence signal at 0.3 ms. The signals were plotted on a logarithmic time scale, and each curve is the average of five replicates