Figure 4.

A_n rate of wild-type N. tabacum and three transgenic lines with altered AOX amount, in both well-watered plants (A) and moderate drought-stressed plants (B). A_n rate was measured at saturating irradiance (1,600 PPFD) in an atmosphere containing 400 µmol CO₂ mol⁻¹ and either 21% or 2% O₂. Data are the mean ± se of three independent experiments. Within each treatment, plant lines not sharing a common letter above the data bar are significantly different from one another (P < 0.05). WT, Wild type.