2,4-表油菜素内酯对紫花苜蓿高温胁迫生理特性的影响

Effects of 2,4-Epibrassinolide on physiological characteristics of alfalfa to high temperature

为了探究外源激素2,4-表油菜素内酯(EBR)对紫花苜蓿(Medicago sativa L.)耐热性能的影响,试验以紫花苜蓿WL525为材料,研究高温环境下喷施不同浓度2,4-表油菜素内酯对紫花苜蓿生理特性的影响。结果表明,高温胁迫下,当EBR喷施浓度为0.50 mg/L时,可以明显提高脯氨酸含量,减缓可溶性蛋白质的流失,维持植物较高的抗氧化活性。由此可见,通过施用外源激素2,4-表油菜素内酯,可以在一定程度上缓解高温胁迫对紫花苜蓿的热伤害。

In order to study the effects of exogenous 2,4-Epibrassinolide(EBR)on the heat tolerance of alfalfa(Medicago sativa L.),taking alfalfa WL525 as the material,the effects of different concentrations of EBR on physiological characteristics of alfalfa under high temperature were studied.The results showed that under high temperature stress,when the concentration of EBR was 0.50 mg/L,the content of provine could be significantly increased,soluble protein loss could be slowed down,and antioxidant activity of plants could be maintained.Therefore,the heat damage of alfalfa to high temperature stress can be alleviated to a certain extent by applying exogenous EBR.