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. 2020 Jan 17;10:1702. doi: 10.3389/fpls.2019.01702

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Copyright © 2020 Lopez-Delacalle, Camejo, García-Martí, Nortes, Nieves-Cordones, Martínez, Rubio, Mittler and Rivero

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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Ionomics in leaves of tomato recombinant inbred line (RIL)-66 and RIL-76 under salinity, heat, or the combination of salinity and heat. (A) Heat map of the concentration (expressed as log2) of the main cations and nitrogen (N) forms in tomato leaves of RIL-76 (salinity+heat tolerant) and RIL-66 (salinity+heat sensitive) under salinity, heat stress, and the combination of salinity+heat as compared to their controls. (B–F) Absolute concentration of total nitrogen (B), nitrates (C), organic nitrogen (D), soluble proteins (E), and total amino acids (F) obtained in RIL-66 and RIL-76. Bars are mean values ± SE (n = 6), and bars with different letters are significantly different at p < 0.05 according to Tukey's test. (n = 6). Stars are representative of significant differences p < 0.05 (*p < 0.05, **p < 0.01, ***p < 0.001) respect to control plants.