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. 2019 Sep 12;181(3):993–1007. doi: 10.1104/pp.19.00809

Figure 6.

Figure 6.

Hormone profiles in apical and basal root zones with progressing plant age. Concentrations of cytokinin ribosides (CK; A and B), auxin (C and D), and SA (E and F) in the apical (ARZ) or basal root zone (BRZ) of hydroponically grown barley plants sampled weekly from 18 to 53 d after germination (dag). DW, Dry weight. Symbols represent means ± se. Different letters indicate significant differences among means according to Tukey’s test at P < 0.05 (n = 5 independent biological replicates). IPR, Isopentenyladenosin; tZR, transzeatin riboside; cZR, cis-zeatin riboside.