Fig. 4

A Shoot length, B Shoot biomass (DM), C SPAD values (Chlorophyll), D Zinc shoot concentration, E Superoxide dismutase (SOD) leaf activity, and F SOD root activity of maize plants exposed to a root zone temperature of 12–14 °C for two weeks in a cooling system. 0-Ctrl untreated control, Prox Proradix, Afect Algafect. Data represent means and SE of five independent replicates for each treatment. Significant differences (Tukey test, α < 5 %) are marked with different letters