Figure 4.

Infection by Aphanomyces euteiches and nitrogen (N) deficiency increase phenolic compounds in Medicago truncatula roots. The concentrations of root‐soluble phenolics of the four M. truncatula genotypes F83005.5, SA022322, A17 and DZA045‐6 were determined in plants cultivated in vitro for 10 days on complete medium or nitrate‐deficient (NØ) medium and inoculated or not with A. euteiches. FW, fresh weight. Error bars indicate standard errors (n = 4 biological replicates) and letters indicate significant differences (P < 0.05). Data from a representative experiment out of three independent experiments are shown. NØ‐IS, genotype displaying NØ‐induced susceptibility; NØ‐IR, genotype displaying NØ‐induced resistance.