高温胁迫下苜蓿抗氧化系统及叶绿素含量对草酸的响应

Effect of oxalic acid on chlorophyll content and antioxidant system of alfalfa under high temperature stress

在40℃高温胁迫条件下,对经5 mmol/L草酸处理后的苜蓿叶片细胞膜透性、叶绿素含量和抗氧化系统进行研究。与对照相比,处理组苜蓿Medicago sativa叶片的细胞膜透性和丙二醛(MDA)含量降低,叶绿素含量和过氧化物酶(POD)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、抗坏血酸(AsA)、还原型谷胱甘肽(GSH)等抗氧化系统的活性增强,表明草酸提高了苜蓿的耐热性。

The effect of oxalic acid solution （5 mmol/L） on cell membrane penetration chlorophyll and antioxidant system of alfalfa under high temperature stress was studied an , content of d the results showed that the oxalic acid solution could decrease the effect of high temperature stress on cell membrane penetration and MDA content, meanwhile, the contents of chlorophyll, POD, CAT, SOD, AsA and GSH were increased. These results indicated that the oxalic acid solution could enhance the heat tolerance of alfalfa.