The increase in the concentration of salts in soils and water is one of the problems that most threatens humanity due to its direct effect on crop productivity. All this in a context of population growth such as humanity has never experienced before. In general terms, the question we want to contribute to is how to deal with salinization in the context of climate change and population growth?More specifically, we study the problems in south-eastern Spain from an approach in which the results can be exploited in the short and medium-term by the business sector.The region of Murcia is one of the main producing areas in south-eastern Spain where there are also serious salinization problems for various reasons: from the contamination of aquifers by very intensive agricultural practices, to factors such as the proximity to the sea and the high level of the water table, for which the processes of marine intrusion in the aquifers are of relevance. On the other hand, this producing area is among the areas that will be most affected by the effects of climate change, such as increased temperatures, reduced rainfall and rising sea levels.In this doctoral thesis, it is proposed to use saline water for irrigation and to investigate the implications that this entails at the level of water and nutrient absorption, also studying the physiological changes in the plant to obtain applications that allow economic growth. In this sense, two strategies are approached: on the one hand, the study of halophytic plants, and on the other hand, biostimulation in glycophyte plants.