Effect of seed priming with gibberellic acid and salicylic acid on seed germination characteristics of turnip in different temperature conditions

This study was conduct to investigate effect of Salicylic acid and Gibberellic acid to the reaction of turnip seed temperature and relative to the pretreatment premier herbal physiology lab in Azad University of bojnourd in academic year of 2015-2016 has done. The experiment for factorial in format of very random repeated for 4 times. The hormones growth promoters contain in the amount of 0, 250, 500 mg/l for 24 hours and Salicylic acid in the amount of 0, 250, 500 mg/l for 10 hours at different temperatures of 15, 20, 25, 30, 35 Ċ in 12 days' germination examined. After reviewing the results can be stated that the use of seed priming increased germination rate and uniformity of emergence in different temperature conditions to 30 ° C was effective and could reduce the time to 50% germination, In general can say to use of Gibberellic acid prime at a concentration of 500 mg/l And Salicylic acid treatment with concentration of 250 mg/l At higher temperatures reduce the effects of thermal stress on Index germination and seedling components And improve the germination.