PADI3 and infection: To further investigate the basis of the lack of the elicitor‐induced protection in pcap1‐mutant plants upon infection with B. cinerea, we evaluated the expression of the defence‐related gene PHYTOALEXIN DEFICIENT 3 (PAD3, AT3G26830), which encodes the enzyme involved in the last step of camalexin biosynthesis (Zhou et al., 1999).