Fig. 1.

The response of flag leaves from six rice accessions during photosynthetic induction. (A) Net leaf CO₂ assimilation (A), (B) stomatal conductance (g_s), (C) intercellular CO₂ concentration (C_i), and (D) intrinsic water use efficiency (iWUE=A/g_s) with time (t) of induction upon change at 0 s from low light to high light (50 µmol m^–2 s^–1 to 1700 µmol m^–2 s^–1). The measurement was taken at an ambient [CO₂] of 400 µmol mol^–1. Two accessions, AUS 278 (red) and IR64-21 (black), were selected for further study at varied [CO₂]. The other four accessions are Dechangbyeo, Fei Zhao 12, M 102, and Malogbana. Each point is the mean ±SE) of eight plants (n=8).