Antioxidant pool optimization in [i]Carthamus tinctorius[/i] L. leaves under different NaCl levels and treatment durations
2016
Zaoui, Sonia | Gautier, Hélène | Bancel, Doriane | Chaabani, Ghaya | Wasli, Hanen | Lachaâl, Mokhtar | Karray-Bouraoui, Najoua | Unité de recherche Plantes et Systèmes de Culture Horticoles (PSH) ; Institut National de la Recherche Agronomique (INRA) | Faculté des Sciences de Tunis, Unité de Physiologie et de Biochimie de la Réponse des Plantes aux Contraintes Abiotiques ; Tunis El Manar University [University of Tunis El Manar] [Tunisia] = Université de Tunis El Manar [Tunisie] = جامعة تونس المنار (ar) (UTM) | Tunisian Ministry of Scientific Research and Technology; Agreenium
Safflower (Carthamus tinctorius L.) leaves are a good source of natural antioxidants, but their content is highly related to the plant response to NaCl constraint; therefore, optimizing culture conditions is required to improve leaf antioxidant accumulation while maintaining acceptable biomass production under stressful conditions. Leaves from plants grown at (0, 25, 50, and 75 mM NaCl) for three treatment durations (7, 15, and 30 days) were studied. NaCl concentrations and treatment durations for optimal biomass and biomolecules production were concluded. After 30 days of treatment, 25 mM NaCl enhanced total AsA leaf accumulation, while glutathione, soluble protein accumulation as well as SOD and GR activities were promoted at 75 mM NaCl. Non-significant changes were found for MDHAR and DHAR activity, added to, a very low level of reduced AsA, suggesting that ascorbate recycling was not an efficient system in safflower leaves under salinity. Our study demonstrates that C. tinctorius tolerates NaCl stress due to the complementary roles of powerful antioxidant molecules, such as ascorbate (for short-term treatments), glutathione (for long-term treatments), and increased SOD and GR activities.
Afficher plus [+] Moins [-]Mots clés AGROVOC
Informations bibliographiques
Cette notice bibliographique a été fournie par Institut national de la recherche agronomique
Découvrez la collection de ce fournisseur de données dans AGRIS