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当前位置: 首页 > 文章 > 外源ABA对低温胁迫下冬小麦细胞膜脂组分及膜透性的影响 东北农业大学学报 2014 (10) 26-33
Position: Home > Articles > Effect of low temperature stress on winter wheat membrane lipid composition and membrane permeability under exogenous abscisic acid treatment Journal of Northeast Agricultural University 2014 (10) 26-33

外源ABA对低温胁迫下冬小麦细胞膜脂组分及膜透性的影响

作  者：
王军虹;徐琛;苍晶;于晶;张成亮;王兴;王健飞;王祖建;苍炜
单  位：
东北农业大学生命科学学院
关键词：
冬小麦;ABA;东农冬麦1号;低温胁迫;膜质
摘  要：
为探讨外源ABA对低温胁迫下冬小麦膜质脂肪酸的影响,以强抗寒品种东农冬麦1号和冷敏感品种济麦22为材料,三叶期叶面喷施适宜浓度ABA,大田自然降温条件下,分别于10 d最低温平均4、0、-10、-25℃时取样叶片和分蘖节,测定膜质脂肪酸的含量变化。结果表明,叶片中,两种小麦不饱和指数均呈逐渐下降趋势,其中东农冬麦1号不饱和脂肪酸含量低于济麦22;分蘖节中,东农冬麦1号亚麻酸含量在降温过程中逐渐升高,而棕榈酸含量始终低于济麦22,说明亚麻酸和棕榈酸与冬小麦抗寒性关系密切。外源ABA处理后,两种小麦叶片和分蘖节中的不饱和脂肪酸含量均较未处理高,且东农冬麦1号叶片不饱和指数在零上温度时均大于济麦22,叶片和分蘖节分别于4℃、-25℃达到最大值,其中东农冬麦1号分蘖节不饱和脂肪酸呈逐渐上升趋势、且不饱和指数均高于济麦22,达到差异极显著。外源ABA使两品种小麦电导率、均有不同程度降低,东农冬麦1号MDA降幅大于济麦22,且达到差异显著,表明ABA对强抗寒品种膜脂抗寒性的促进作用大于冷敏感品种。
译  名：
Effect of low temperature stress on winter wheat membrane lipid composition and membrane permeability under exogenous abscisic acid treatment
作  者：
WANG Junhong;XU Chen;CANG Jing;YU Jing;ZHANG Chengliang;WANG Xing;WANG Jianfei;WANG Zujian;CANG Wei;School of Life Sciences, Northeast Agricultural University;
关键词：
winter wheat;;Dongnongdongmai1;;low temperature stress;;UFA;;liquid membrane
摘  要：
Two winter wheat cultivars of Dongnongdongmai1(freezing- tolerant) and Jimai 22(freezing-sensitive) were used to investigate the effects of exogenous ABA on lipid composition under cold stress. Leaves were sprayed with 10-5mol· L-1ABA when seedings were at the 3-trure-leaf stage in the lowest temperature for 10 d at 4, 0,-10,-25℃ to study the effect of exogenous ABA on lipidcomposition. The results showed that the contents of unsaturated fatty acids gradually decresed in the two cultivars, and the IUFA of Dongnongdongmai 1 were lower than Jimai 22 in leaves. The linolenic acid contents of Dongnongdongmai 1 was higher and the palmitic acid contents was lower that those of Jimai 22, C(16:1) and C(18:3) were determined as the reference for freezing rolerant indicators. The treatment under exogenous ABA have highter unsaturated fatty acids contents than the treatment of water.especially in maxmum temperature of 4℃,-25℃ in leaves and nods.The unsaturated fatty acids gradually incresed on the nods of Dongnongdongmai 1, and the IUFA was higher than Jimai 22, achieved very significant levels. The contents of MDA and ralative electrical conductivity gradually decresed in the two cultivars, and the decreased in Dongnongdongmai 1 were lower than Jimai 22, and achieved significant levels. These showed that ABA improving cold hardiness of freezing-tolerant culrivar than freezing-sensitive cultivar.

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