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. 2021 Apr 12;12:633221. doi: 10.3389/fpls.2021.633221

FIGURE 4.

FIGURE 4

Expression levels of PAL and PPO genes in the leaves of Sixing F1 and Jin12 F1 at different time points after being inoculated with Podosphaera xanthii. (A,B) The expression levels of the PAL gene in Sixing F1 and Jin12 F1, respectively; (C,D) the expression levels of the PPO gene in Sixing F1 and Jin12 F1, respectively. The line bars, different letters, and treatments are detailed in the footnote of Figure 2 and Table 2.