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. 2019 Feb 28;10:188. doi: 10.3389/fpls.2019.00188

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Copyright © 2019 Sanchez-Arcos, Kai, Svatoš, Gershenzon and Kunert.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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PCA plots of metabolic features of leaves of pea aphid host plant species before and after infestation by three different aphid host races. Features are derived from UHPLC-Orbitrap mass spectrometry of aqueous methanol extracts conducted in negative (top row: A,C,E,G) and positive (bottom row: B,D,F,H) ionization modes for M. sativa (A,B), T. pratense (C,D), P. sativum (E,F), and V. faba (G,H). Only the 5% of metabolomic features that changed most are plotted. Small colored circles represent individual plant metabolic profiles after infestation with the MR (green), TR (blue), or PR (yellow) host race or of uninfested control plants (red). Colored ellipses represent the 95% confidence regions for each group.