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Figure 1: Mycorrhizal colonisation at harvest of barley (a), tomato (b), and Medicago (c) inoculated with the AMF R. irregularis and grown at four (a, b) or six (c) different soil Zn concentrations ranging from no addition of Zn (Zn 0) to high soil Zn addition. See Supplementary Table 1 for details of ANOVA results. Intervals on each box represent the minimum, Q1, median, Q3, and maximum values and any outlier values (dots), n=4 (a, b); n=6 (c).