Size distribution of siRNAs derived from BaMV or satBaMV-co-inoculated <i>N. benthamiana</i>.

The total siRNAs were isolated from BaMV-inoculated (I) and systemic (S) leaves, BaMV and BSF4 co-inoculated (I) and systemic (S) leaves, and BaMV and BSL6 inoculated leaves (I). (A) siRNAs matched to positive-strand (+) BaMV (left panel) or negative-strand (−) BaMV (right panel). (B) siRNAs matched to satBaMV (+) (left panel) or satBaMV (−) (right panel). Y axis represents the counts of siRNAs; X axis represents the length of siRNAs. The relative percentages of siRNAs of 21 and 22 nt to total siRNAs are shown above the bars.