Temporal gene expression patterns in the pepper-PepGMV recovery system. Relative gene expression measured by quantitative reverse-transcription PCR at four time points: 6, 9, 15 and 20 days post-inoculation (dpi). Error bars indicate standard deviation of mean for triplicate samples and β-tubulin gene was used for data normalization. Mock: pepper plant mock-inoculated; PepGMV: pepper plants inoculated with PepGMV. A) RRP1 (kiwellin ripening-related protein); B) GST1 (glutathione S-transferase); C) PR5 (thaumatin-like protein); D) Gene expression levels of Pepper golden mosaic virus (PepGMV), Rep (Replication-associated protein) and NSP (Nuclear shuttle protein).