Abstract：Abstract: Seeds of Triticum aestivum L. (LM 15), a salt-sensitive wheat cultivar, were pre-soaked with salicylic acid (SA) to examine the effect of SA pretreatment on the germination and seedlings growth under 100 mmol/L NaCl. The results showed that, whether the seeds were pre-soaked with SA or not, the growth of wheat seedlings was significantly inhibited under salt stress and the seedling fresh weight (FW) or dry weight (DW) was dropped notably. However, 0.1 mmol/L, 0.2 mmol/L and 0.3 mmol/L SA pre-soaking significantly alleviated the growth inhibition of wheat seedlings under NaCl stress, and 0.2 mmol/L SA pre-soaking gave rise to the best alleviative effect. In the experiment, 0.2 mmol/L SA pre-soaking significantly alleviated the β-amylase activity and imbibition rate of wheat seeds under salt stress. In addition, wheat seedlings that seeds were pre-soaked with 0.2 mmol/L SA had more FW and DW, lower Na+ concentration, higher K+ concentration and K+/Na+ ratio, higher activities of SOD, CAT and POD along with lower MDA content of leaves. These results indicated that seeds pre-soaking with SA increased salt-tolerance of wheat seedlings by maintaining a higher K+/Na+ ratio, enhancing SOD, CAT and POD activities and reducing the degree of membrane lipid peroxidation.
引用本文:
刘亚栋, 张长峰. SA浸种对盐胁迫下小麦种子萌发和幼苗生长的影响[J]. 生命科学研究, 2017, 21(3): 244-250.
LIU Ya-Dong, ZHANG Chang-Feng. Effects of Seed Pre-soaking with Salicylic Acid on Seed Germination and Seedling Growth of Wheat under Salt Stress. Life Science Research, 2017, 21(3): 244-250.
2017, Vol. 21 
