Figure 3.

Temperature responses of photosynthetic parameters measured in greenhouse‐grown AP3 and WT lines. (a) Net CO₂ assimilation at 400 ppm CO₂. (b) Maximum rate of Rubisco carboxylation V _cmax. (c) Maximum electron transport rate (J _max). (d) Apparent CO₂ compensation point ($C_{\mathrm{i}}^{\ast }$) calculated using the common intercept method and slope regression (Walker et al., 2016a). Dotted (AP3) and dashed (WT) lines represent the modelled temperature response of each parameter based on either the calculated activation energy for each parameter (b–d) or by modelling the temperature response of photosynthesis according to the Farquhar‐von Caemmerer‐Berry model using parameters derived here (a). Data are the mean and standard error for n = 4–6 replicates. *Statistical differences at P < 0.05 between all AP3 lines and WT based on repeated measures ANOVA and Dunnett’s post‐hoc comparison.