摘要
用等渗的NaC l和PEG处理三叶期小麦幼苗,3d后测定各项生理指标.结果表明,两种处理均引起幼苗叶片相对含水量、叶绿素含量降低,质膜透性增大,丙二醛含量上升,脯氨酸含量大幅度上升,叶片渗透势降低.NaC l处理使叶片可溶性蛋白含量降低,而等渗的PEG处理却引起可溶性蛋白含量上升.相比较而言,在等渗胁迫下,NaC l引起的伤害大于PEG引起的伤害,说明盐胁迫除了引起渗透胁迫外,离子胁迫也起到了重要作用.
The wheat seedlings were treated with iso- osmotic NaCl and PEG at three leaf stage and some physiological indexes were determined after three days. The results showed that the water relative content and chlorophyll content of leaves decreased, the membrance relative permeability and MDA content increseed, the prolinel content increased and the osmotic potential decreased hishly. The soluble content of wheat decreased under the NaCl stress but increased under the iso - osmotic PEG stress. Comparing the injury between the iso- osmotic NaCl and PEG stress, it was greater under NaCl stess than PEG stress. It shows that the ionic stress is as important as the osmotic stress in the salt stress.
出处
《衡水学院学报》
2006年第1期66-68,共3页
Journal of Hengshui University
基金
河北省科技攻关指导课题(04220164)
关键词
等渗胁迫
小麦
丙二醛
脯氨酸
可溶性蛋白
渗透势
iso-osmotic stress
wheat
MDA
prolinel
soluble protein
osmotic potential
