— The relationship is studied between the physiological and biochemical characteristics of different ecological halophyte groups and their adaptive strategies (determined by the type of adaptation to soil salinity, type of photosynthesis, and life form). It is found that the key parameters that determine the formation of different adaptation strategies of halophytes are the rate of CO 2 gas exchange, content of chlorophylls a + b , and cell membrane permeability. At the same time, different adaptation strategies of halophytes significantly differ in the pattern and range of variation in their physiological and biochemical characteristics, which indicates different manifestations of adaptation mechanisms and deeper ecological differentiation of individual halophyte species and groups.