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Fig. 2 | Rice

Fig. 2

From: Resistance Genes and their Interactions with Bacterial Blight/Leaf Streak Pathogens (Xanthomonas oryzae) in Rice (Oryza sativa L.)—an Updated Review

Fig. 2

Xa21-mediated immune signaling pathways triggered by Xanthomonas oryzae. Sulphated RaxX is recognized by XA21 and activate XA21-mediated resistance. Several XA21 binding proteins, including OsSERK2, XB3, XB10, XB15, XB21, XB24, XB25, Bip3 and SDF2 are involved in regulating XA21-mediated resistance. XA21 is processed in endoplasmic reticulum, which is negatively and positively regulated by the ER chaperones BiP3 and SDF2, respectively. OsSERK2 positively regulates the immunity by forming a constitutive complex with XA21 and transphosphorylating XA21. XB24 binds to XA21 and promotes autophosphorylation of XA21 to keep it in an inactive state. During Xoo infection, XB24 dissociates from XA21. XB3 and XB25 are required for XA21 accumulation. XB15 dephosphorylates the autophosphorylated XA21 and attenuates the XA21-mediated resistance. XB21 functions as an auxilin to positively regulate XA21-mediated immunity. The transcription factor XB10/OsWRKY62 acts as a negative regulator XA21-mediated immunity

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