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. 2016 Oct 22;21(5):1871–1881. doi: 10.1007/s00784-016-1980-3

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© The Author(s) 2016

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 2 — A two-dimensional ordination by principal component analysis (PCA) of the bacteriomes. a The bacterial composition of apical (N = 22; light gray) and coronal root segments (N = 22; black) were not statistically significantly different (p = 0.899, one-way permutational multivariate analysis of variance; PERMANOVA). b The bacterial composition of fungi-positive (N = 20; dark gray) and fungi-negative root segments (N = 24; white) was statistically significantly different (p = 0.008; PERMANOVA). Principal components PC1, PC2 (not shown), and PC3 explained 20, 16, and 9 % of the overall variance among samples, respectively. Corresponding apical and coronal root segments are connected with a line