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Figure 2: Shoot phosphorus concentrations (mg kg−1) at harvest of barley (a), tomato (b), and Medicago (c) and shoot zinc concentrations (mg kg−1) at harvest of barley (d), tomato (e), and Medicago (f) inoculated with the AMF R. irregularis (grey) or mock-inoculated (white) and grown at four (a, b, d, e) or six (c,f) different soil Zn concentrations ranging from no addition of Zn (Zn 0) to high soil Zn addition. Means followed by the same letter were not significantly different at the P<0.05 level (Tukey’s HSD); see Supplementary Table 1 for details of ANOVA results. n=4 (a, b, d, e), n=6 (c, f). Note: y-axis does not begin at zero for (a), (b), and (c).