摘要： 在砂培模拟干旱条件下,叶面喷施精胺(Spm)1 mmol/L可提高小麦幼苗叶片相对含水量,降低质膜透性,提高抗旱性;而亚精胺(Spd)和Spm的抑制剂-甲基乙二醛一双(脒基腙)(MGBG)1 mmol/L的作用相反.内源多胺含量测定表明,Spm使叶片内源腐胺(Put)、Spd和Spm含量均有所提高;而MGBG处理虽增加了内源Put含量,却降低了Spd和Spm水平.

关键词: 多胺, 小麦, 幼苗, 抗旱性

Abstract: Under simulative drought stress with sand culture, spraying leaves with Spm(1 mmol/L) could increase relative water content,but decrease relative membrane permeability, thus enhance drought-resistance of wheat seedlings. However, spraying leaves with MGBG(1 mmol/L), an inhibitor of Spd and Spm, had opposite effects. The contents of endogenous Put, Spd and Spm in wheat seedling were stimulated by Spm treatment. But by MGBG treatment,only put was stimulated while the contents of Spd and Spm were reduced.

Key words: Pas, Wheat, Seedling, Drought-resistance

中图分类号: 

• S512.01