Additional file 3.

Figure S2. Lateral root density (# of lateral roots/cm) of Medicago truncatula. Wild-type (grey columns) and raz (open columns) observed at 10 dpi using WinRhizo Pro. Letter rankings indicate differences as determined by Tukey’s HSD at 95% confidence. Bars are standard error. Ideal Zn = 0.35 μM (pZn activity ~9.85 with N and ~9.84 without N) and High Zn = 18 μM (pZn activity ~7.55 with and without N as calculated by GeoChem-EZ).

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Lewis et al. BMC Research Notes 2012 5:657   doi:10.1186/1756-0500-5-657