Root-endophytic bacterial community composition as a function of growth differences.
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(A) Bars represent mean total dried biomass across all field soils and all autoclaved field soils with SE. The asterisks indicate statistically significant differences [ANOVA tests with P ≤ 0.05, n = 537]. Difference in total biomass between individuals of the same plant species correlated with difference in endophytic root microbiome composition (calculated using Bray-Curtis dissimilarity). Each point represents two individuals’ difference in root microbiome and biomass. (B) C. nutans (n = 52), (C) M. fistulosa (n = 52), (D) R. pinnata (n = 50), (E) C. canadensis (n = 46), (F) H. helianthoides (n = 47). Differences calculated between samples grown in autoclaved soil are in grey, between samples grown in field soil are in pink, and between one sample grown in field soil and one grown in autoclaved soil in black. Lines and regression statistics are based on Mantel and linear regression.