Identification of Phenotypic and Physiological Markers of Salt Stress Tolerance in Durum Wheat (Triticum durum Desf.) through Integrated Analyses
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 reveal...
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| Veröffentlicht in: | Agronomy (Basel) 2019-12, Vol.9 (12), p.844 |
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| creator | Guellim, Amira Catterou, Manuella Chabrerie, Olivier Tetu, Thierry Hirel, Bertrand Dubois, Frédéric Ben Ahmed, Hela Kichey, Thomas |
| description | 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. |
| doi_str_mv | 10.3390/agronomy9120844 |
| format | Article |
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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.</description><identifier>ISSN: 2073-4395</identifier><identifier>EISSN: 2073-4395</identifier><identifier>DOI: 10.3390/agronomy9120844</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Abiotic stress ; Ammonium ; Cultivars ; Dehydrogenases ; Enzymes ; Ethanol ; Genotypes ; Glutamate-ammonia ligase ; Glutamine ; Hydroponics ; Impact analysis ; Isotope ratios ; Leaf area ; Life Sciences ; Markers ; Metabolism ; Metabolites ; Multivariate analysis ; Physiology ; Plant growth ; Principal components analysis ; Proline ; Salinity ; Salinity effects ; Salinity tolerance ; Salt ; Salts ; Seeds ; Sodium chloride ; Stable isotopes ; Triticum durum ; Wheat</subject><ispartof>Agronomy (Basel), 2019-12, Vol.9 (12), p.844</ispartof><rights>2019 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 (http://creativecommons.org/licenses/by/4.0/). 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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. 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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.</abstract><cop>Basel</cop><pub>MDPI AG</pub><doi>10.3390/agronomy9120844</doi><orcidid>https://orcid.org/0000-0002-0602-544X</orcidid><orcidid>https://orcid.org/0000-0001-5125-7410</orcidid><orcidid>https://orcid.org/0000-0002-8949-1859</orcidid><orcidid>https://orcid.org/0000-0002-5518-3671</orcidid><orcidid>https://orcid.org/0000-0003-1878-7940</orcidid><orcidid>https://orcid.org/0000-0003-1211-2125</orcidid><orcidid>https://orcid.org/0000-0001-6972-9869</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Abiotic stress Ammonium Cultivars Dehydrogenases Enzymes Ethanol Genotypes Glutamate-ammonia ligase Glutamine Hydroponics Impact analysis Isotope ratios Leaf area Life Sciences Markers Metabolism Metabolites Multivariate analysis Physiology Plant growth Principal components analysis Proline Salinity Salinity effects Salinity tolerance Salt Salts Seeds Sodium chloride Stable isotopes Triticum durum Wheat |
| title | Identification of Phenotypic and Physiological Markers of Salt Stress Tolerance in Durum Wheat (Triticum durum Desf.) through Integrated Analyses |
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