Fig. 10
The heatmap for the investigated parameters. “*” show p < 0.05, and “**” show p < 0.01. The number represents the r value. Chl a, Chlorophyll a; Chl b, Chlorophyll b; Car, Carotenoids; Net, Net photosynthetic rate; Gs, Stomatal conductance; Ci, Intercellular CO2 concentration; Tr, Transpiration rate; SS, Soluble sugars; SP, Soluble protein; Glu, glutamic acid contents; Pro, Proline; 1-P, Δ1-pyrroline contents