Fig. 5.

(A) trans-Zeatin and (B) trans-Zeatin-O-Glucoside specific leaf content of the second oldest harvested mature leaf of the winter oilseed rape cultivars NPZ-1, NPZ-2, Apex and Capitol grown in hydroponics during 12 d N starvation (0.1mM) or optimal N supply (4.0mM). The plants were pre-cultured for 28 d at 2.0mM N. ANOVA: +, *, **, *** indicate significant differences at P<0.10, P<0.05, P<0.01, <0.001, respectively; ns, non-significant. *, **, *** above the columns indicate significant differences between the cultivars at P<0.05, P<0.01, P<0.001, respectively. The error bars represent the standard deviations of the means (n=3–4).