Changes in the expression of PhaNPR1 and PhaPR1 under hormone treatments or virus infection. (A) Analyses of PhaNPR1 and PhaPR1 expression in Phalaenopsis aphrodite subsp. formosana leaves after treatment: (H) Healthy, (D) CymMV infection, (M) 1% [v/v] ethanol, (SA) Sodium salicylate and (JA) methyl jasmonate. (B) Analyses of PhaNPR1 and PhaPR1 expression at various time intervals after SA treatment or CymMV infection. Data are the mean ± SD of 3 biological replicates. Expression fold changes are relative to that of healthy controls with UBIQUITIN level as an internal reference. h: treatment hours.