Fig. 4.

Leaf gas exchange variables and two piecewise linear function fitting the relative responses to salinity, a) Net photosynthesis, b) Transpiration and c) Conductance. Each point represents the mean value of the 3 experiments and the two dates of measurement for Experiments 1, 2 and 3 and field experiment (Experiment 4). Error bars represent variability across replicates (4–6 plants), experiments (Experiment 1 and 2, Experiment 3 and Experiment 4) and time of measurements (7, 14, 21 d after start of salinity treatment), together with ± standard error. The lines were fitted using linear regressions of the response patterns for each genotype.