Figure 4

Impact of A. fabrum (RB) and GABA on fenugreek photosynthetic rate (A), stomatal CO2 concentration (B), stomatal conductance (C) and transpiration rate (D) under 0Ni and 80 mg Ni/kg soil. The bars (n = 4) ± SE showed different letters for treatments significance at p ≤ 0.05; Tukey test.