The effect of pretreatment with tZ and SA on the relative expression of genes encoding NADPH oxidase, and activity of peroxidase and catalase in two wheat cultivars of in Kaz10 and Om35 infected with SnB. (A) The mRNA abundance of the TaRbohD gene in the Kaz10 and Om35 at 6 and 24 hpi. (B) The mRNA abundance of the TaRbohF gene in the two Kaz10 and Om35 cultivars at 6 and 24 hpi. Expression values were normalized to the housekeeping gene TaRLI as an internal reference and expressed relative to the normalized expression levels in mock-treated control (water) plants at 0 hpi. (C) Peroxidase activity in the Kaz10 and Om35 cultivars at 24 and 72 hpi. (D) Catalase activity in the Kaz10 and Om35 cultivars at 24 and 72 hpi. Symbols are the same as in Figure 5. Figures present means ± SE (n = 6). Asterisks indicate means statistically different from the control and different number of asterisks (*, **, ***, ****) allows distinguishing of significantly different variants according to the LSD test at * p < 0.05, ** p < 0.01, *** p < 0.001, **** p < 0.0001.