Figure 5: Changes in nitrogen and mineral composition of shoots of S. portulacastrum and B. juncea grown for 21 days in various split-root configurations. (a) Ca2+ (μmol g-1 DW), (b) K+ (mmol g-1 DW), (c) reduced N (μmol g-1 DW). B: Basal medium; Pb basal medium supplied with 400 μM Pb(NO3)2; B-K; B-Ca and B-N: basal medium deprived of K+; Ca2+ or N, respectively. Means of eight replicates. Bars marked with same letter are not significantly different at p = 0.05.