Fig. 2
Photosynthesis (mM (CO2) M−2S−1), stomatal conductance (mol M−2S−1), carbon dioxide (ppm), and transpiration rate (mol M−2S−1) of tomato plants grown under soil water contents of 75–70% and 55–50% and different soil textures in China. Treatment values presented for comparison are the means of three replications (± SE, standard error). Means followed by different letters are significantly different (p ≤ 0.05) according to Tukey’s test