While the miR171-directed cleavage of SCL6-III (At3g60630) mRNA [27] was detected in both mock- and TMV-Cg-infected wild type Arabidopsis (Fig 5B, lanes 1 and 2), cleavage of the CPSF30 and the TRAP α -like mRNAs appeared to be specific to TMV-Cg-infection (Fig 5B, lanes 3–6). Here, CPSF4 is linked to infection.