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. 2019 Nov 12;19:493. doi: 10.1186/s12870-019-2114-2

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© The Author(s). 2019

Open AccessThis 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. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 4 — SRM chromatograms of (a) standards and (b) sample extracts: a. salicylic acid (SA), b. 2,3-dihydroxybenzoic acid (2,3-DHBA), c. jasmonic acid (JA), d. salicylic acid 2-O-β-D-glucoside (SAG), and e. methyl salicylate (MeSA)