The Regulation of Ion Homeostasis, Growth, and Biomass Allocation in Date Palm Ex Vitro Plants Depends on the Level of Water Salinity

The date palm, a central plant in the fragile oasis ecosystem, is considered one of fruit species most tolerant to salt stress. However, tolerance mechanisms involved are yet be addressed and their evaluation until now was mainly based on heterogenous material such as seedlings or limited vitro experiment conditions. For these reasons, we propose deepen our knowledge morphological physiological responses stress using acclimated ex plants resulting from propagation single genotype. were irrigated with 0, 150, 300, 450 mM NaCl solutions for four months. Our results showed that influence water salinity growth ion-homeostasis regulation very dependent levels. 150 concentration found improve dry biomass by about 35%, but at higher concentrations (300 mM) it decreased 40–65%. shoot:root mass ratio significantly then increased increasing concentration. leaf:root Na+ Cl− up 300 NaCl, stabilized similar values NaCl. In contrast Cl−, leaf K+ content than root all treatments. Unlike K+, expelled surface leaves response salinity. Overall, palm appear more capable excluding changing allocation according salt-stress level, roots both play an important role this strategy.