Effects of Salicylic Acid on the Growth and Some Physiological Characters in Salt Stressed Wheat (Triticum aestivum L.)

This study was conducted to determine the effects of seed soaking in salicylic acid (10(-2) mol/L, 10(-4) mol/L, 10(-6) mol/L and control) on the growth and some physiological characters in wheat (Triticum aestivum L.) under salinity (8 ds m(-1)) and non salinity conditions. NaCl reduced the emergence percentage, the growth parameters (shoot and root dry weight), K+/Na+ ratio, osmotic potential and photosynthetic pigments (Chl a, b and carotenoids) contents in wheat seedlings. The emergence percentage was not changed, in contrast, shoot and root dry weight of seedlings, K+/Na+ ratio, photosynthetic pigments (Chl a, b and carotenoids) contents and osmotic potential were increased by salicylic acid treatments under non salinity condition. Seed soaking in SA increased the emergence percentage, osmotic potential, shoot and root dry weight, K+/Na+ ratio, photosynthetic pigments (Chl a, b and carotenoids) contents in the salinity stressed wheat seedlings. These results were indicated that SA has positive effects on plant growth in salinity and non salinity conditions. But the effects of SA was higher on emergenge percentage, K+/Na+ ratio and osmotic potantial in salinity condition compared to non salinity condition was obtained in this study.