Germination and seedling growth of safflower under different salinity levels of sodium chloride at different temperature

To evaluate germination and seedling growth of safflower an experiment carried out as factorial with two factor; temperature (5, 15, and 25 °C) and salinity of sodium chloride (0, 5, 10, and 15 ds/m) based on randomized complete block design with four replications, in Dept. of horticulture of Urmia University. Results of different concentration sodium chloride on germination and seedling growth of safflower under different temperature showed significance of salinity and growth temperature level on germination rate, percent, and time to 50% germination. These factors had no effect on reduction of germination. Significance of interaction between salinity and temperature on germination index, shoot and root length, shoot and root dry weight showed different trends of them under these factors. The minimum amounts of percentage (76), rate (7.6 N/Day) of germination and longest time to 50% of germination (135 h.) were occurred at 15 ds/m of sodium chloride. But the maximum amounts of percentage (86), rate (8.6 N/Day) of germination and shortest time to 50% of germination (58 h.) were occurred at 5 ds/m same with 0 and 10 ds/m. Increasing of temperature at all levels of sodium chloride led to highest value of germination index.