Investigation the possibility of salinity tolerance induction in sunflower (Helianthus annuus L.) with seeds priming by pyridoxine and kinetin

Due to positive effect of pyridoxine and kinetin on germination and salinity tolerance induction in sunflower, this experiment was carried out as factorial arrangement based on completely randomized design with three replications in Agricultural Research Center of Rasht in 2014. Experimental factors consisted of pyridoxine (0, 0.03 percent and 0.06 percent), kinetin (0, 10 and 20 milligram per liter) and salinity (0, 50 and 100 milliMolar NaCl). The results showed that the interaction between salinity × pyridoxine × kinetin was significant on all measured traits except oxidative enzymes. The interaction between pyridoxine × kinetin was significant on peroxidase enzyme. Also, the effect of pyridoxine and the interaction between salinity × kinetin were significant on the amount of proline and catalase enzyme. Under salinity tension (100 milliMolar), the highest germination percentage was obtained by treatment 10 milligram solution kinetin × pyridoxine non application. The interaction between salinity (50 milli Molar NaCl) × kinetin (zero) × pyridoxine (0.06 percent) showed the highest rate of germination. The results of this experiment showed that the highest rate of peroxidase enzyme was allocated to the interaction between kinetin 20 milligram × pyridoxine (0.06 percent). The highest rate of proline in leaf of sunflower seedling was observed in the interaction between treatments of kinetin (20 milligram) × salinity (100 milli Molar) and pyridoxine (0.06 percent)× salinity (100 milli Molar NaCl), respectively. Based on this research findings, seed priming by kinetin (20 milligram per liter) and pyridoxine (0.06 percent) caused increasing the rate of peroxidase enzyme and proline and enhancing salinity tension tolerance in sunflower seedlings.