Salinity stress is a research area that focuses on the impact of high salt levels in soil or water on plants, crops, and ecosystems. Salinity stress occurs when the concentration of salt in the soil or water exceeds the tolerance levels of plants, leading to reduced growth, decreased yield, and even plant death. Researchers in this area study the mechanisms by which plants respond to and cope with high salt levels, as well as developing strategies to improve plant tolerance to salinity stress through genetic, physiological, and agronomic approaches. Improved understanding of salinity stress can help mitigate its negative effects on agriculture and ecosystem health, particularly in regions where salinization is a growing concern due to factors like irrigation practices and climate change.