NPR3 and infection: The expression pattern of the SA-related DEG NPR1 was examined, since it is a key player in SA signaling; isochorismate synthase 1 (ICS1) is a key enzyme for SA biosynthesis; NPR3/NPR4 are transcriptional repressors of SA-responsive gene expression in the absence of pathogen infection [61]; and the pathogenesis-related protein PR-1 is salicylic acid (SA)-responsive.