The enzymes β‐1,3‐glucanase (PR2), chitinase (PR3) and phenylalanine ammonia‐lyase (PAL) are crucial for plant defence responses to pathogen infection: β‐1,3‐glucanase disintegrates cell walls of fungi; chitinase creates an effect against different fungal pathogens; and PAL produces antimicrobial phytoalexins (Appu et al., 2021). The gene discussed is PRTN3; the disease is infection.