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. 2023 Nov 6;23:543. doi: 10.1186/s12870-023-04568-2

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. 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 in a credit line to the data.

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Fig. 8 — Hierarchical clustering and heatmap diagram of all measured plant parameters in response to exogenous GABA application and drought and salinity stress in the ‘Rabab’ cultivar. Stomatal limitation (Ls), mesophyll conductance (G_m), net photosynthetic rate (Pn), stomatal conductance of water vapour (gs), transpiration rate (Tr), intercellular carbon dioxide concentration (Ci), plant aerial part fresh weight (PAP FW), plant aerial part dry weight (PAP DW), root fresh weight (Root FW), root dry weight (Root DW), root diameter (Root D), root volume (Root V), chloride (Cl), magnesium (Mg), sodium (Na), potassium (K), phosphorus (P), manganese (Mn), zinc (Zn), and iron (Fe), potassium/sodium (K/Na). Control (C), drought (D), salinity (S), and drought-salinity (D×S)