In order to evaluate the effect of different seed priming techniques on germination and early growth of two wheat cultivars (Cross Alborz and Sardari) tow experiments carried out at the Razi University Laboratory of Physiology, Faculty of Agriculture and Natural Resources, Kermanshah, Iran. This study was in two separate experiments. The experiments were factorial arranged in a completely randomized design with four replications. The first factor was seed primed for 12, 18, 24 and 30hours, the second was four concentrations of gibberellic acid (50, 100, 150and 200 ppm), PEG-6000 (-0.3 MPa) and the third was two wheat cultivars. Seeds were primed for 12, 18, 24 and 30 hours at temperature 25°C in different solutions. Results showed that for hormonal priming, maximum shoot and root length, shoot and root dry weight and germination rate were observed at GA 50 ppm and 24 h treatmeant in Cross-Alborz and Sardari cultivars. For osmmopriming maximum shoot and root length, shoot and root dry weight and germination rate were abserved at 12 h treatment.

This study was designed to investigate the effects of seed storing after priming on germination of two wheat cultivars (Cross Alborz and Sardari). The study consisted of five experiments. In experiments 1-4 we tested seed priming with distilled water (hydro priming), potassium nitrate (KNO 3 ), gibberellin (GA 3 ), PEG-6000 (osmopriming) in different concentrations (50, 100 150 and 200 ppm for GA 3 ) and (1%, 2%, 3% and 4% for KNO 3 ) and times (12, 18, 24 and 30 hours). Germination tests were subsequently performed on all above mentioned seed priming methods. The best treatment (time and concentration of media) which emanated from experiments 1-4 was considered for experiment 5. In experiment 5, we tested the effects of storing duration after seed priming (0, 30, 45 and 60 days) on germination characteristics of wheat. Maximum stem and radicle length, stem and radicle dry weight and speed of germination in cv. Cross Alborz and cv. Sardari were observed in priming treatments when the seeds primed by GA 3 50 ppm for 24h, KNO 3 1% for 24h, hydropriming 12h and osmopriming 12h.The results showed that storing of primed seeds improved shoot and radicle length, shoot and radicle dry weight, germination percentage and speed of germination.