Effect of salinity stress on rice varieties (Oryza Sativa L.) in seedling and reproductive stages under hydroponic culture conditions

To survey the effect of different salinity levels on rice varieties, two separate experiments were carried out at germination and reproductive stages under laboratory and growth chamber conditions, respectively under in a factorial randomized complete block design (first factor 10 salinity levels and second factor 10 rice varieties). According to results, with increasing salinity levels, the dry weight of root and shoot and the amount of potassium in terms of dry matter percentage was decreased and the dry matter content of sodium in organ was increased and at reproductive stage, the plant height, panicle number, number of filled grains in panicles and filled seed weight in panicle were reduced. Cluster analysis, based on the studied traits at the reproductive stage, divided the cultivars into four distinct groups, and Garib siyah reyhani cultivar were isolated in a separate group, that it's possible to recommended as a cultivar and source of salt tolerance for use in breeding program.