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. 2018 Dec 6;9:1810. doi: 10.3389/fpls.2018.01810

FIGURE 2.

FIGURE 2

Cross-protection against aggressive PepMV isolates that induce yellow bright mosaic in leaves. (A) Yellow bright mosaic severity scale on leaves: 1, no symptoms; 2, occasional isolated spots; 3, spots along the leaflet lamina in 10–30% of the leaves; 4, coalescent spots in 30–60% of the leaves; 5, yellowing in more than 60% of the leaves. (B) Mean severity of bright yellow mosaic symptoms 182 days after pre-inoculation (infection with PepMV-Sp13, -PS5 or -SP13 + -PS5) and 158 days after challenge with an aggressive CH2-type isolate, PepMV-KLP2, or an aggressive EU-type isolate, PepMV-H30, in cv. Pitenza plants. Non-pre-inoculated controls (untreated) were used as reference. Treatments with no letters in common are significantly different, LSD test (P ≤ 0,05), n = 4. Bars represent standard error of the mean.