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. 2021 Oct 19;22(20):11288. doi: 10.3390/ijms222011288

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Heatmap of gene expression and results of real-time PCR validation. Heatmap of genes related to antioxidant enzymes synthesis (A) and photosynthetic pathway (B), and the results of real-time PCR validation (C–I) under normal irrigation (control) and drought treatment (drought) in leaves of S. calendulacea, S. trilobata and their hybrid. Different lowercase letters (a, b, c, d) above bars indicate statistical significance (p < 0.05). CC: control of S. calendulacea; CT: control of S. trilobata; CH: control of the hybrids; DC: drought stress treatment of S. calendulacea; DT: drought stress treatment of S. trilobata; DH: drought stress treatment of the hybrids.