Effect of Salicylic Acid and Gibberellin Acid on Germination and Growth of Wheat under Different Levels of Salinity

Abstract

The laboratory experiment was conducted on bread wheatTriticum aestivum cv. Abu-Ghraib in laboratory. Two factors were used; the first was concentrations of salicylic acid (SA) at 25, 50 and 75 mg/l, the second was gibberellin acid(GA) at 250, 500, and 750 mg/l. dry seeds, and seeds soaked in water, watering was done by distilled water 3.13, 7.81, and 12.50 ds/m. The soaking of seed for 24h in 75 mg/L SA solution gave higher speed of germination, germination, length of radicle and coleoptile, seedling dry weight, seedling vigor and seeding vigor index. The increased salinity had decreased all studied traits. However the solution of 12.5 ds/m gave no germination