生命科学研究2017，Vol.21Issue(3)：244-250,7.DOI:10.16605/j.cnki.1007-7847.2017.03.010
SA浸种对盐胁迫下小麦种子萌发和幼苗生长的影响
Effects of Seed Pre-soaking with Salicylic Acid on Seed Germination and Seedling Growth of Wheat under Salt Stress
摘要
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 theβ-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.关键词
小麦/盐胁迫/水杨酸(SA)/种子萌发/膜脂过氧化Key words
wheat/salt stress/salicylic acid (SA)/seed germination/membrane lipid peroxidation分类
农业科技引用本文复制引用
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):244-250,7.基金项目
山东省自然科学基金资助项目(ZR2012CM010) （ZR2012CM010）
