Growth and mineral nutrition in saline conditions of two varieties of pea, Pisum sativum L. | Croissance et nutrition minérale en milieu salé de deux variétés de pois, Pisum sativum L.
2003
Lachaal, M. ((Institut National de la Recherche Scientifique de Tunisie, Hammam Lif (Tunisie). Laboratoire d'Adaptation et d'Amélioration des Plantes)) | Kafsi, M. | Abdelly, C. | Soltani, A. | Hajji, M.
Two pea cultivars were cultivated in semi-controlled conditions on medium added with increased NaCl concentrations (0, 50 and 100 mM). They show differences in salt sensitivity, in particular at early growth stages. Lincoln cultivar seemed to be less sensitive than Douce de Provence variety. Relative tolerance of the first variety, expressed by higher dry matter production in salt medium, was associated to higher shoots water content (dilution effect), to unlimited potassium providing and to higher K+/Na+ selectivity for absorption and accumulation in the roots. These caracteristics disappeared in a longer term. Leaves Na+ and Cl- accumulation which discriminated two cultivars led to toxicity and severe growth inhibition, especially at 100 mM NaCl. In these conditions, Lincoln was able to compartimentalize Na+ in its stem and to provide sufficient calcium enough for protection against Na+ damages (low ratio Na+/Ca2+)
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