AM colonization, including percentage intraradical hyphae (IRH), arbuscules (A) and vesicles (V) of M. truncatula cngc15a GOF and cngc15c GOF, 5 weeks post-inoculation (wpi) with R. irregularis. Box and whisker plots show 25% and 75% percentiles, median, minimum and maximum. The number of plants analysed is indicated below the grid line. Statistical significance is indicated; two-tailed unpaired t -test, previous F -test for homoscedasticity. Three biological replicates were performed.