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. 2019 Apr 16;19:148. doi: 10.1186/s12870-019-1726-x

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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. 2 — Mean SPAD index (a) and S/R (b) values of SO4 and 1103P microcuttings grown for 14 days in presence (+Mg) and absence of Mg (−Mg). Data were expressed as mean ± SEM of data from three growth independent experiments (n = 3). The statistical significance was determined by means of Student’s t-test. (∗P < 0.05) using the GraphPad InStat Program (version 5.0)