Fig. 1

Root and shoot dry matter (a, b), root and shoot phosphorus (P) concentration in dry matter (c, d), P translocation factor (shoot P/root P; e), P efficiency ratio (PER; f), a measure of P use efficiency calculated as Shoot Dry Matter/(Shoot P Concentration × Shoot Dry Matter), and root and shoot zinc (Zn) concentration in dry matter (g, h) of two Brassica oleracea accessions (C6 and F103) grown hydroponically for two weeks in solutions containing 0.025 mM P (Low P; LP) and 0.25 mM P (High P; HP). Data are means (n = 18 for dry weight and n = 5–6 for concentrations, translocation factor and PER) and standard errors. Asterisks and different letters indicate statistically significant differences (two-way analysis of variance followed by Holm-Sidak post hoc test at P < 0.05)