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. 2017 Jul 26;4:17038. doi: 10.1038/hortres.2017.38

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Copyright © 2017 The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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Biplot of the Principal Component Analysis (PCA) on the autoscaled data showing the projection of the data set in the PC1×PC2 plane. The size of each dot is proportional to the sampling time (1–18 days). The gray arrows show the contribution of the metabolites to each principal component. Transparency is used to highlight metabolites strongly contributing to the PC1×PC2 projection.