These data indicate that LYK2, CERK1 and LYK5 are all required for full priming of PAD3 expression upon infection after elicitor pre‐treatments, which is likely dependent on an increased ability of the plant to respond more efficiently to chitin, whereas priming of PR‐1 expression is dependent on LYK2 but largely independent of chitin perception. The gene discussed is TMEM37; the disease is infection.