Increased expression of GSH1 and GSH2 therefore may be a response to the high demand for glutathione to re‐establish ROS homeostasis after an infection or for synthesis of the sulphur‐containing phytoalexin camalexin during the migratory stage of infection (Parisy et al., 2007; Siddique et al., 2014). The gene discussed is GSX1; the disease is infection.