Phenolic levels in leaves of susceptible and resistant grapevines.

Line graphs showing over time foliar levels of total phenolics (A), hydroxycinnamic acid derivatives (B), and flavonoids (C) for both resistant (R) and susceptible (S) grapevines receiving the different infection treatments [non-wounded (C), mock-inoculated (M), or Xylella fastidiosa-infected (X)]. F-statistics are provided for comparisons between infection treatments (top) and for genotypes (bottom), along with a brief description of significant effects by LSD. * represents p-values less than 0.050, ** represents p-values equal to or less than 0.010; *** represents p-values equal to or less than 0.001; n.s. = no significance; NW = non-wounded controls; Mock = mock-inoculated controls; Xf = X. fastidiosa inoculated plants; Sus. = susceptible genotype; Res. = resistant genotype.