The plants were irrigated three times per week and harvested 7 months after the treatments started. ![]() ![]() The experiment was carried out at high temperature (35/27☌), and the plants were irrigated with three types of water supplemented with Hoagland nutrients: DSW, DLB (DSW with low boron), and Control (distilled water). These rootstocks differ in their salinity and boron tolerance, SO being more tolerant than CM. One-year-old ‘Verna’ lemon trees grafted on two rootstocks (CM, Citrus macrophylla, and SO, sour orange) were used. Citrus species are classified as salt and boron-sensitive however, the rootstock plays a fundamental role in the tree’s tolerance of abiotic stresses. ![]() However, the use of DSW could affect the crop productivity due to its chemical composition (predominance of phytotoxic ions: Na +, Cl −, and B). In arid and semiarid regions, the current lack of natural water resources is driving the use of alternative sources for crop irrigation, such as desalinated seawater (DSW).
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