Figure 5. Sustained MAPK activation is sufficient for PR1 induction.

The PR1 (A) or FRK1 (B) expression levels in DEX-MKK4DD (MKK4DD) or -MKK5DD (MKK5DD) at the indicated times after treatment with 2 µM DEX were determined by qRT-PCR. Bars represent means and standard errors of three biological replicates calculated using a mixed linear model. The vertical axis shows the log₂ expression level relative to Actin2 (At2g18780). Asterisks indicate significant differences from untreated samples (0 h) (P<0.01, two-tailed t-tests).