Expression tests of TaAMT1;1a, TaAMT1;1b, and TaAMT1;3a in LC and Mini 2761 following urediniospore inoculation of Pgt showed that all three genes were induced by the infection only in LC, a wheat stem rust-susceptible line, but not in Mini 2761, a wheat stem rust immune variety. Here, SLCO2A1 is linked to infection.