Figure 2.

(A) Disease incidence and (B) disease index of Medicago sativa inoculated with Rhizophagus intraradices (AM) and infested with Acyrthosiphon pisum (A+) or non-inoculated with R. intraradices (NM) and non-infested with A. pisum (A−). All values are the mean ± SEM of three biological replicates. Different letters above pairs of bars indicate a significant difference in the comparison at p < 0.05. Asterisks indicate a significant difference between P + A+ and P + A− as determined by Tukey’s HSD test. SEM, standard error of the mean.