Fig. 3.
Kinetics of P700 oxidation measured at 705 nm as a function of the time of dark-adaptation after illumination. Ki PSI ≈8.4 × 10 s-1. (A) The leaf was submitted to dark and light periods as follows: dark-adaptation (≈3 h), 20 s of far-red light (curve 1), 1 min of dark, and 20 s of far-red light (curve 2), 20 min of dark, 20 s of far-red light, 3 min of dark, and 20 s of far-red light (curve 3), 20 min of dark, 20 s of far-red light, 6 min of dark, and 20 s of far-red light (curve 4). (B) Curve 1, dark-adapted leaf. Curves 2, 3, and 4, >10-min strong green light plus 15, 25, and 43 min of dark, respectively.