Roll of Gibberlic Acid and Sprimidin on Germination of Spring Cultivars of Wheat Under Salinity Stress

Objective: In order to Investigate effects of Gibberlic acid (GA3) and Sprimidin Poly Amine on Germination of three Cultivars of Wheat under Salinity Stress. Methods: The experiment was conducted as factorial based on completely randomized design with four replicates in Agronomy and plant breeding laboratory of Agricultural department of Islamic Azad University, VaraminPishva branch in spring of 2014. The first factor was salinity with four levels (S1: 3.87 ds/m, S2: 5.95 ds/m, S3: 10.25 ds/m and S4: 12.87 ds/m) and the second factor was three cultivars of spring wheat including V1: Tajan, V2: Arg and V3: Pishtaz and the third factor 4 levels of hormone including H0: control (not application of hormone), H1: GA3 100 mg/L, H2: sprimidin 5 mmol/L and H3: GA3 100 mg/L + sprimidin 5 mmol/L. coleoptile and cleorhiza length, cleorhiza number, coleoptiles, cleorhiza and seedling dry weight, tissue water content (TWC), germination percent and number of damaged seeds were measured. Results: Analysis of variance showed that coleoptile and cleorhiza length, cleorhiza number, seedling and cleorhiza dry weigth affected by salinity, hormone and cultivar treatment at 1% of probability level. There are no significant differences for other properties. Results of this experiment indicated that even application of these treatments, development processes of germination under salinity stress decreased greatly.