Figure 3. Relative amount of TYLCV (normalized to the host nuclear β-actin gene) in H⁺ (black dots) and H⁻ (red dots) Q whiteflies (B. tabaci) after 10 acquisition access periods (AAPs) as determined by q-PCR.

Values are means ± standard deviation. Asterisks indicate that gene expression was significantly greater in H⁺ than in H⁻ Q (* P < 0.05, ** P < 0.01). The black and red arrows indicate the time when viral titer reached a steady-state in H⁺ and H⁻ Q, respectively.