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, varamin-pishva 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.