Fig. 3.

Diversity analyses of the mycobiomes of root canal infections as determined through sequencing of the ITS1 region. a Observed species richness (number of OTUs/sample). b Shannon diversity index of within-sample diversity. c Bray-Curtis similarity index of between-sample diversity. Wilcoxon signed-rank test was done to compare apical (N = 6) to coronal root segments (N = 6) for the species richness and Shannon diversity index. The Kruskal-Wallis test was done using the Bray-Curtis similarity indices of the paired root samples to the apical and coronal grouped root segments, with post hoc analysis using the Mann-Whitney U test and an FDR correction (q* = 0.033). *p < 0.001