Figure 1: BCTV or BCTV L2 mutant (ΔL2/2) infection of wild-type Col-0 (WT) or csn5a mutant Arabidopsis plants. Four- to five-week-old Arabidopsis plants were agroinoculated with BCTV or BCTV L2 mutant and scored for the appearance of symptoms at 28 dpi. Total DNA was extracted from each plant and subjected to DNA hybridization to quantify viral DNA accumulation. A. Percentage of inoculated plants showing symptoms. Results are the mean of two independent experiments. Bars represent standard error; letters above the bars indicate a statistically significant difference according to a t-student test (p<0.05). B. Relative viral DNA accumulation quantified by Phosphorimager analyses of DNA slot blots. The results are the mean of at least 10 plants in each case. Bars represent standard error; letters above the bars indicate a statistically significant difference according to a T-student test (p<0.05).