Fig. 10

The impact of cultivation systems: rhizotron (black color), container (grey color), and transplanted (hashed lines) on the concentration of IAA (A), IBA (B), IA-Ala (C), IA-Leu (D), IA-Phe (E), and IA-Me (F) in the meristematic zone of short, medium, and long taproots of Q. robur seedlings. Each data point represents the mean hormone values for each root length class in each cultivation system, incorporating multiple individual roots from each cultivation system. Hormone concentration values were log10-transformed prior to statistical analysis, but the figures present non-transformed data. The significance of variation between cultivation systems within length classes (short, medium, and long) results from an analysis of variance (ANOVA), as indicated for each length class panel. Different lower-case letters indicate significantly different means among different cultivation systems within a given length class at α = 0.05, according to Tukey’s test. Error bars represent the standard error