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. 2020 May 25;11:639. doi: 10.3389/fpls.2020.00639

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Copyright © 2020 O’Neill and Lee.

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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Comparison of amino acid abundance in each genotype analyzed by MALDI-MSI of tissue section compared to LC-MS extract. MALDI-MS data presents signal intensities for selected amino acids normalized to gold matrix peak (n = 3). LC-MS data presents integrated peak areas for the extracted ion chromatogram of each amino acid normalized to the tissue weight (n = 4).