摘要:本文采用室内砂培盆栽人工控制盐分的方法，研究了赤霉素对缓解NaCl胁迫下丝瓜幼苗生长的影响，生理生化（叶绿素、脯氨酸），以及氧化损伤和抗氧化系统中酶活性(MDA、SOD)的变化规律。结果表明：随着NaCl浓度的升高抑制了丝瓜的生长发育，GA3提高了丝瓜幼苗的鲜重、干重、叶绿素含量、SOD活性、脯氨酸含量，降低了丝瓜幼苗的MDA含量，缓解了NaCl胁迫伤害的效应，有利于丝瓜幼苗在NaCl胁迫条件下生长。
关键词：NaCl胁迫； 丝瓜；幼苗生长； 赤霉素
Abstract：This essay, adopting the method of manually controlling the salinity of the indoor potted plants cultured by sandy culture, researches the relief effects which gibberellin has on the growth of loofah seedlings under NaCl, physiology and biochemistry (chlorophyll, proline), oxidative damage and the change law of enzymatic activities (MDA, SOD) in oxidative damage system. The result reveals that the incresing of NaCl concentration inhibited the growth and development of the loofahs and GA3 is conducive to the loofah seedling growth under Nacl stress. Because GA3 improves the fresh weight, dry weight, chlorophyll content, SOD activity and proline content of the loofah seedlings. And GA3 also reduces the MDA content of the loofah seedlings and eases the effect of Nacl stress injury,is conducive to the loofah seedling growth under stress conditions in Nacl.
Key words:NaCl Stress; Loofah; Seedling Growth; GA3
