Figure 3. Non-metric multidimensional scaling (NMDS) plot showing diversity of root-derived endophytic fungi among six roots from each of seven locations (A–G) along environmental gradients (levels of Ca, humus, P and pH).

Filled grey circles indicate common endophytes; empty grey circles indicate rare endophytes. The four fitted environmental vectors showed correlations on the ordination plot with significance (Ca, P and pH: p < 0.01; humus: p < 0.05).