Figure 4.

Correlation between image analysis-based quantification of sporulation and quantification of lipid markers of P. viticola. Leaf disc bioassay was performed with Cabernet-Sauvignon, Syrah, Cinsault, V. rupestris, V. riparia, and V. rotundifolia, using 15 leaf discs for each variety. (A) Typical quantification of sporulating area 6 days post inoculation using image analysis (Peressotti et al., 2011). (B) Correlation and associated p-value of individual lipid marker quantification with sporulating area, using Pearson's correlation test.