Figure 2

Effect of arbuscular mycorrhizal inoculation on gaseous exchange traits of maize under zinc deficient soil conditions. (a) Photosynthetic rate (µmol m^-2 s^-1) (b) stomatal conductance (mol H₂O m^-2 s^-1) (c) transpiration rate (mmol m^-2 s^-1). Zn₀ (control), Zn_1.5 (1.5 mg kg^-1_), Zn₃ (3 mg kg^-1), Zn₆ (6 mg kg^-1), Zn₁₂ (12 mg kg^-1), inoculated with AMF (M + grey), un-inoculated (M- white). Error bars represent standard error and asterisk (*) shows a significant difference (p ≤ 0.05) among treatments (Zn × AMF interaction).