In addition, gene repression of ics1, which encodes for the precursor enzyme of SA biosynthesis (isochorismate synthase), and of SA-dependent responses (PR genes) was reported after infection of A. deliciosa with Psa strain CFBP7286, while the same genes were promoted when uninfected plants were exposed from volatile compounds emitted by infected plants [55]. The gene discussed is DNAI1; the disease is infection.