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. 2019 Oct 7;19:414. doi: 10.1186/s12870-019-1992-7

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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. 1 — Effects of Melatonin (100 μM) on accumulation of (A) superoxide ion (O₂^•−), (B) hydrogen peroxide (H₂O₂), (C) generation of superoxide ion (O₂^•−) and (D) content of hydrogen peroxide (H₂O₂) in leaves of tomato seedlings in presence or absence of high temperature (42 °C) stress. CK: Control; MT: 100 μM melatonin; HT: High temperature (42 °C); MT + HT: 100 μM melatonin + high temperature (42 °C). Data represent as a mean of standard deviation (SD) of three replications. Different letters indicate significant differences according to Tukey’s HSD test at P ≤ 0.05