Figure 4.

Responses of P700⁺, PC⁺, and Fd⁻ during the induction of photosynthesis in wheat leaves. Wheat leaves were illuminated using AL, which was turned on at 0 s. Levels of P700⁺ (A), PC⁺ (B), and Fd⁻ (C) were measured simultaneously at 25 °C leaf temperature, 40 Pa pCO₂, 21 kPa pO₂, and 1000 mol photons m⁻² s⁻¹ light intensity. Data represent mean ± standard deviation (SD; n = 5). I, phase I; II, phase II; III, phase III.