Figure 1. Recognition of the immune signals by receptor kinases and receptor proteins (1) In Arabidopsis, LRR-type receptor kinase and receptor protein recognize pathogenic protein or polypeptide; (2) EGF-type receptor WAK1 recognize oligogalacturonides (OGs); (3) Lectin-type receptor kinase participate in immune signaling recognition; (4) LysM-type receptor kinase or receptor protein recognize chitin and peptidoglycan (PGN) signal in Arabidopsis and rice.
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