Fig. 6.

NPP1 exerts a negative effect on shoot and root growth, especially under conditions of high temperature and CO₂ concentrations. At 7 d after imbibition, WT and npp1 seedlings were incubated for an additional 7 d under different CO₂ concentration (40–280 Pa) and temperature (12 h light/12 h dark: 28°C/23°C or 33°C/28°C) conditions. (A, B) Images of WT and npp1 seedlings grown under 160 Pa CO₂ at 28°C/23°C (A), and at 33°C/28°C (B). Graphics show the FW of dissected shoots (C) and roots (D) of WT (filled squares) and npp1 (open squares) seedlings. Values show the means ± SD (n = 10). Asterisks indicate significant differences by Student’s t-test (P > 0.05).