In Arabidopsis, 49 out of 72 WRKY genes tested responded to bacterial infection or salicylic acid37, and 8 Arabidopsis WRKY genes (WRKY 18, WRKY 38, WRKY 53, WRKY 54, WRKY 58, WRKY 59, WRKY 66, and WRKY 70) were characterized as direct targets of NPR1, a key regulator of SA signalling38. The gene discussed is NPR1; the disease is bacterial infectious disease.