Fig. 3.

Content of 5-methylcytosine (5mC) in young and old fronds of P. cretica var. Albo-lineata. Values represent mean ± SD. The Kruskal-Wallis test was used to compare the significance (p < 0.05) between: i) treatments of young fronds (control and As₁₀₀) and old fronds (control, As₁₀₀ and As₂₅₀) and ii) young and old fronds of control and As₁₀₀ treatment. Treatments significantly different from each other are marked with asterisks. Differences between young and old frond was not significant. Coefficients of variation (CV, %) are in Additional File 2