Figure 6.

Polyamine oxidase responses to P. syringae. A, Col-0 wild-type and nata1 mutant leaves were infiltrated with P. syringae DC3000. Mean ± se of n = 3. Different letters indicate significant differences, P < 0.05, ANOVA followed by Tukey’s honest significant difference test. Transcript abundance of polyamine oxidases PAO1 (B), PAO2 (C), PAO3 (D), PAO4 (E), and PAO5 (F) was measured by quantitative RT-PCR at the indicated times after P. syringae infiltration into leaves. Mean ± se of n = 9, *P < 0.05, two-tailed t-test comparing wild type and nata1 expression at the same time point.