Figure 1.

Effects of two pipo alleles differing in length on TuMV biological properties. (A) Differences in accumulation rate between the wild-type pipo⁶¹ and the long pipo⁷⁰ alleles across three experimental host species. Accumulation rate was measured as the per-day Malthusian growth parameter. (B) Rates of expansion of infection foci for the two alleles in the three experimental host species. (C) Speed of systemic infection for the two alleles in the three experimental host species. The time necessary to produce a systemic infection was measured as described in Lafforgue et al. [28]. Panels (B) and (C) share the same legend: solid symbols and lines correspond to the pipo⁶¹ allele, whereas open symbols and dashed lines to the pipo⁷⁰ allele.