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. 2021 Apr 21;11:8576. doi: 10.1038/s41598-021-87886-5

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Overview of the metabolic reprograming analysed by FT-ICR in mycorrhizal and non-inoculated roots interpreted using PCA and PLS-DA. (a) PCA scores plot of mycorrhizal (Myc) and non-inoculated (Cont) cork oak roots. Each point represents a biological replicate (b) PLS-DA scores plot of mycorrhizal (Myc) and non-inoculated (Cont) cork oak roots. Each point represents a biological replicate. (c) Cross-validation scores plot of the PLS-DA for the classification into mycorrhizal and non-inoculated groups using the FT-ICR data as a function of the number of PLS components. The number of components that maximizes Q2 is indicated with a star. Charts were produced with the free available on-line software MetaboAnalyst v4.0 (https://www.metaboanalyst.ca/).