ETRII (A and D), PSII excitation pressure (B and E), and NPQ (C and F) of wild-type N. tabacum (black circles) and three transgenic lines (B7, white circle; RI9, white triangle; and RI29, white square) with altered AOX amount, in both well-watered plants (A–C) and moderate drought-stressed plants (D–F). Data are the mean ± se of three independent experiments.