However, this finding suggests that increase in TAS3 transcription was consistent with the increased miR390 in response to V592 infection, presumably resulting in continuous production of TAS3-derived ta-siRNAs to target ARF2, ARF3 and ARF4 that affect developmental timing and patterning in Arabidopsis (Fahlgren et al. 2006). This evidence concerns the gene ARF3 and infection.