Figure 4.

(A) The simplified illustration of the plant WRKY gene families. The WRKY gene family is classified into the I (I N and I C), II (IIa, IIb, IIc, IId, IIe), and III subfamilies. (B) A diagram that illustrates the participation of WRKY1 in pathogen-associated molecular pattern (PAMP)-induced regulation of the WRKY gene and its target gene through a negative feedback loop or direct binding to the W box of the pathogen-related gene 1 (PR1) gene. WA, WB, and WC represent a specific arrangement of the W box in the promoter of WRKY1, interacting with constitutively expressed WRKY proteins.