Evolution Effect of Abscisic acid (ABA) Foliar Application on Salt Tolerance of Canola Varieties

This experiment was conducted to investigate the effect of salinity and ABA foliar application on growth and physiology of two canola varieties (Fornex and Okamer). Salinity levels (0 and 12 ds/m) and ABA foliar application (0، 15 and 30 µmol L-1) were investigated using a factorial split design in 3 replications. Results showed variety Fornex was salt stress tolerance variety. ABA foliar application had negative effect on variety Fornex under salinity condition. ABA foliar application (15 µmol L-1) under salinity condition increased shoot dry matter، peroxidase activity and leaf K+ concentration but decreased leaf Na+ concentration in variety Okamer. ABA foliar application (15 µmol L-1) increased salinity tolerance in variety Okamer but used 30 µmol L-1ABA foliar application decreased growth in this variety.