Fig. 4.

Responsivity of AdPCS1, AdPCS2, and AdPCS3 to Cd stress. Time-course variation by real-time PCR of AdPCS1-3 expression in A. donax roots (A) and shoots (B) in response to HM stress resulting from treatment of the root system with 500 µM CdSO₄. The Y-axis reports variations in transcript level compared with the non-stressed condition (0 h, indicated by the continuous line at Y=1). Bars indicate SD (n=3 biological replicates); asterisks indicate statistically significant differences from untreated controls (P<0.05, t-test corrected with false discovery rate).