短期盐胁迫下燕麦幼苗的生理响应

为挖掘燕麦(Avena sativa L.)耐盐基因,筛选耐盐品种,本研究利用水培法,采用0,100,200,250,300mmol·L-1 NaCl对‘VAO-9’与‘蒙农大燕1号’两个燕麦品种幼苗进行盐胁迫处理,研究72h内叶片质膜系统、渗透调节物质和抗氧化物酶活性变化,根据生理指标的变化判断幼苗生理响应机制。结果表明,燕麦在盐胁迫下通过调动自身渗透调节物质,维持生物膜的稳定性,提高抗氧化物酶系统的酶活性,抵御一定的盐胁迫。

Physiological Responses of Oats Seedlings to Short-term Salt Stress

To mining salt tolerant genes of oats and select salt tolerant varieties,this study used hydroponics and adopted 0 (CK),100,200,250,300 mmol · L-1 NaCl salt stress treatments on two oat varieties.The changes of membrane systems,osmotic adjustment and antioxidant activity of blade within 72 hours were monitored,and according to the changes of physiological indicators to determine physiological response mechanism of seedlings.The results showed that oats maintained the stability of bio-membranes by mobilizing its own osmotic adjustment,and resisted salt stress to a certain degree by increasing the activity of antioxidant enzymes.