The expression levels of allene oxide synthases (AOS; BnaC02g29610D) and lipoxygenase 2 (LOX2; BnaA07g19600D), two genes encoding the key enzymes of JA biosynthesis, increased as the pathogen infection proceeded, while the expression levels of JAR1, coronatine-insensitive 1 (COI1), and MYC2 were more complicated (Figure 3C). This evidence concerns the gene ARHGAP31 and infection.