Fig. 4

Average root diameter (mm) of N. reynaudiana grown in high and low P patches under heterogeneous and homogenous P distribution for 30 (top panel) and 90 days (bottom panel). Treatments, T1 – T12, are as described in Fig. 1 and values are mean ± SE (n = 3), * indicates significant difference at p < 0.05 and lowercase letters indicate significant difference between treatments