Аннотация:In presence of global warming and climate aridification, salinity levels of agricultural soils increase. To restore them, plantings of halophytes such as Sedobassia sedoides are used. We compared the responses of two populations of this species to salinity stress, which showed that plants of St population faster accumulate Na+ in its tissues compared with the plants of El population. Plants from both populations demonstrated a decrease in the K+ content when grown under saline conditions. St plants have reduced CO2 assimilation after one week of salinity stress. For plants of El population in saline conditions an increase in the proline content and a decrease in tissue water content were found, which were not observed in St plants, indicating greater resistance of St plants to salinity