Figure 2.
The blockage of RNAi caused by injecting linoleic acid. (A) mRNA accumulation of the target gene after feeding ds-rpl19 followed by injection of LA at different concentrations. (B) Feeding with dsRNA at 24 h, 48 h and 72 h after injecting LA, the mRNA accumulation of the rpl19. (C) mRNA accumulation levels of genes known to be required for the endocytic entry of dsRNAs after injecting LA. (D) Subcellular localization of Cy3-labelled ds-rpl19 in midgut tissue after the injection of LA into B. dorsalis. The scale bar represents 25 μm. Normalized target gene mRNA accumulation is reported relative to mRNA accumulation of the ds-egfp control, which was set to 1. All error bars represent the S.E. of the mean of three independent biological replicates. * indicates a statistically significant difference in rpl19 mRNA accumulation between the feeding ds-rpl19 group and the control ds-egfp group (P < 0.05). ** indicates P < 0.01 (Student’s t-test). Different letters indicate a significant difference in rpl19 mRNA accumulation among the feeding ds-rpl19 treatments (P < 0.05, Duncan’s test).