Fig. 7
PCA analysis on the dataset of genes encoding stress response mediators at 6 h post-exposure in the apical compartment. The relative gene level (fold increase/decrease compared to negative control (gray)) of samples exposed to Ag20 (green), Ag200 (orange) and AgNWs (blue) at the three different doses (low = 0.05 μg/cm2, medium = 0.5 μg/cm2 and high = 5 μg/cm2) are represented on the scatter plot corresponding to PC1 and PC2