Effect of Salicylic Acid on the Growth and Mineral nutrition in Salt Stressed Wheat Plants
摘要
The effect of 0.1 mM salicylic acid (SA) on the counteracting of the NaCl 100 mM-induced deleterious effects on wheat (Triticum durum Desf., var. Razzak) was studied. Effects of SA on salt tolerance of wheat were determined by measuring the growth parameters: shoot and root dry weights. Photosynthetic pigments chlorophylls a and b content and mineral nutrition were investigated in response to the interactive effects of SA and NaCl treatment. Application of 0.1 mM SA through the rooting medium increased plant growth significantly both in saline and control conditions. The results showed that the growth of shoot, and not that of roots, is reduced by 36 % in the presence of NaCl, and only of 14.5 % when SA is present in the medium. NaCl significantly reduced photosynthetic pigments content. Whereas, the addition of SA induce an increase of these contents. Also, SA inhibited Na + accumulation, but stimulated K + and Ca 2+ contents of salt stressed plants. These results suggest that SA could be used as a potential growth regulator to improve plant salinity stress resistance.