Figure 11.

Effect of growth light intensity on the P700⁺ kinetics of wheat cultivars during the one-pulse illumination in rSP illumination. Black lines and gray shadows show the results of wheat cultivars grown under LL conditions, and red lines and pink shadows show the results of wheat cultivars grown under HL conditions. Experiments were performed three times independently, and the data were expressed as mean (solid line) ± SD (shade area). Before measurement, the leaves were kept in the dark for at least 1 h. Pulse illumination (20,000 μmol photons m⁻² s⁻¹, 300 ms) was applied to the leaves every 10 s in the dark at 25°C. Pulse was illuminated from the time “0” in this figure. Dark gray bars indicate the dark conditions and yellow bars indicate the pulse illumination. The difference in the extent of P700⁺ between LL- and HL-grown wheat plants was statistically analyzed at the times 100, 200, and 300 ms during pulse illumination, and peak value (Student’s t-test). Asterisks indicate the significant difference in the P700⁺ induction between LL- and HL-grown wheat plants (p < 0.05). The cultivar difference in P700⁺ kinetics was also analyzed among LL- and HL-grown wheat cultivars by Tukey-Kramer HSD test; however, no significant difference was detected.