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. 2019 Jan 4;9:1840. doi: 10.3389/fpls.2018.01840

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Copyright © 2019 Tugizimana, Djami-Tchatchou, Steenkamp, Piater and Dubery.

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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UHPLC-MS BPI chromatograms (ESI negative data): typical mass chromatograms of extracts from the sorghum NS 5511 (BTT) cultivar leaf tissue samples, responding to fungal infection. Control refers to samples from non-infected plants. The 3–9 d.p.i. samples are also indicated. Visual inspection of these mass chromatograms shows resolution of a number of ion peaks, reflecting the complexity of the extracts. Differential peak populations point to treatment-related metabolic changes: for instance in the retention time range of 4–8min, where differential peak intensities can be seen, and presence or absence of peaks.