Climate change is a global process and has no fixed boundaries. Water and soil are the most affected especially in arid and semi-arid regions. The threat of climate change impact remains the major constraint to the food safety of arid region countries, due mainly to water scarcity, desertification, and land degradation. Drought and salinity stresses are major problems as they affect plant development and productivity. Therefore, solutions are desperately needed, such as the improvement of drought and salinity tolerance of crops, which in turn requires detailed knowledge about tolerance mechanisms in plants. These mechanisms comprise a wide range of responses on molecular, cellular, and whole plant levels. There are large differences in stress responses between plant species. Detailed knowledge of the physiological and biochemical basis of drought and salt tolerance can provide a basis for the cultivation of suitable plants in regions threatened by desertification and water scarcity under sustainable culture conditions. In this seminar, I will present adaptative mechanisms of the Argan tree, a drought tolerant plant, which plays important socio-economic and ecologic roles in its regional location in Morocco; and also results of our research on the screening, undersea water irrigation system, of some halophytic species for their tolerance and adaptations to salinity under highly reproducible greenhouse conditions (quick check system). The studied halophytes share high economic potential, the ability for reclamation of salt-affected lands and the survival at high salinities. ​