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. 2018 Apr 23;9:525. doi: 10.3389/fpls.2018.00525

FIGURE 5.

FIGURE 5

Pathogenesis-related protein gene expression in inoculated and salt-stressed ‘New Yorker’ tomato seedling roots. (A) Time course of P4, and (B), PI-2 expression in non-stressed (control) and 18 h salt stressed (0.2 M NaCl/0.02 CaCl2) roots not inoculated or inoculated with P. capsici at 104 zoospores ml-1. P4 and PI-2 expression was normalized against Cyp and UK. Values are the means ± SE from two experiments, with roots from five plants pooled per sample and six samples analyzed for each treatment mean per time point. Asterisks indicate significant differences among treatment means by the Wilcoxon rank sums test. For P4, χ2 = 14.06, P = 0.003; for PI-2, χ2 = 12.19, P = 0.007.