Fig. 5
Effects of light sources on gas exchange parameters of cotton cotyledons (A ~ D) and true leaves (E ~ H), including net photosynthetic rate (Pn) (A, E), intercellular CO2 concentration (Ci) (B, F), stomatal conductance (Gs) (C, G), and transpiration rate (E) (D, H). Each value is a mean of five replicates ± standard deviation (SD). Different letters indicate significant differences at P < 0.05