Fig. 1
Changes in chlorophyll content and gas change of two maize varieties under moderate drought. A Total chlorophyll content (SPAD), B Net photosynthetic rate (PN), C Stomatal conductance (gs), D Substomatal CO2 concentration (Ci). All data represent means ± standard errors of three replicates. Values with different letters indicate significant difference at P < 0.05 level between treatments based on one-way ANOVA