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Open AccessArticle

Identification of Phenotypic and Physiological Markers of Salt Stress Tolerance in Durum Wheat (Triticum durum Desf.) through Integrated Analyses

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Écologie et Dynamique des Systèmes Anthropisés (EDYSAN, UMR 7058 CNRS UPJV) Laboratoire d’Agroécologie, Écophysiologie et Biologie intégrative, Université de Picardie Jules-Verne, CEDEX 80039, 80025 Amiens, France
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Unité d’Écologie Végétale, Département de Biologie, Faculté des Sciences de Tunis, Université de Tunis, El-Manar 2092, Tunisie
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Adaptation des Plantes à leur Environnement, Unité Mixte de Recherche 1318, Institut Jean-Pierre Bourgin, Institut National Agronomique Paris-Grignon, 78026 Versailles, France
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Author to whom correspondence should be addressed.
Agronomy 2019, 9(12), 844; https://doi.org/10.3390/agronomy9120844
Received: 21 October 2019 / Revised: 18 November 2019 / Accepted: 28 November 2019 / Published: 3 December 2019
(This article belongs to the Section Soil and Plant Nutrition)
Salinity is one of the most important stresses that reduces plant growth and productivity in several parts of the world. Nine Tunisian durum wheat genotypes grown under hydroponic conditions were subjected to two levels of salt stress (100 and 170 mM NaCl) for 21 days. An integrative analysis revealing the impact of salinity on key phenotypic and physiological marker traits was then conducted. Principal component analysis grouped these traits into three different clusters corresponding to the absence of salt stress and the two levels of salt stress. This analysis also allowed the identification of genotypes exhibiting various levels of tolerance to NaCl. Among the nine genotypes of Triticum durum Desf., cultivar Om Rabiaa was the most tolerant whereas cultivar Mahmoudi genotype was the most sensitive. Following the multivariate analysis of the examined phenotypic and physiological traits, we found that shoot length, shoot fresh weight, leaf area, the whole-plant stable isotope ratios of nitrogen (δ15N), shoot ammonium and proline contents, and shoot glutamine synthetase activity could be used as markers for the selection of salt-tolerant wheat genotypes. View Full-Text
Keywords: carbon; durum wheat; genotypes; salinity; markers; nitrogen carbon; durum wheat; genotypes; salinity; markers; nitrogen
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Guellim, A.; Catterou, M.; Chabrerie, O.; Tetu, T.; Hirel, B.; Dubois, F.; Ben Ahmed, H.; Kichey, T. Identification of Phenotypic and Physiological Markers of Salt Stress Tolerance in Durum Wheat (Triticum durum Desf.) through Integrated Analyses. Agronomy 2019, 9, 844.

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