Figure 1.

(a) Symptoms of tobacco plants (Nicotiana tabacum cv. Samsun) inoculated with either the Cucumber mosaic virus pepo or one of the coat protein (CP) mutants, in which the P at residue 129 in the CP was substituted with A, C, D, E, Q or S. The photographs were obtained at 12 days post‐inoculation. (b) Accumulation of Cucumber mosaic virus (CMV) RNA in chlorotic tissues infected with pepo, 129A, 129Q or buffer (mock). The CMV RNA amount was analysed using the total RNA samples from the microarray analysis. CMV RNA was detected by Northern blot analysis using the 3′‐untranslated region (3′‐UTR) of a viral genome‐specific probe.