The relative expression level of lipoxygenase 3 (LOX3) and allene oxide cyclase 4 (AOC4) (JA key synthesis genes) were strongly increased after infection, especially the 80-fold higher expression of LOX3 at 1 hpi and about 2000-fold expression of AOC4 from 2 to 3 hpi than 0-hpi control. The gene discussed is AOC4P; the disease is infection.