节点文献

H₂O₂胁迫锻炼对小麦幼苗抗旱性的影响

Effect of H₂O₂ stress hardening on drought resistance of wheat seedlings

推荐 CAJ下载
PDF下载
不支持迅雷等下载工具，请取消加速工具后下载。

【Author】 XU Yang cang 1,2 ,WANG Jing 1 ,SHAN Lun 3(1 State key Laboratory of Arid Agroecology,Lanzhou University,Lanzhou 730000,China;2 Basic Course Department,Gansu Agricultural University,Lanzhou,730070,China;3 Institute of Soil and Water Conservation,

【机构】兰州大学干旱农业生态国家重点实验室!兰州730000；甘肃农业大学基础课部,兰州730070,兰州大学干旱农业生态国家重点实验室!兰州730000,中国科学院、水利部水土保持研究所!陕西杨陵712100；

【摘要】 12 d龄的春小麦幼苗在 1 mmol· L- 1及 1 0 mmol· L- 1H2 O2 的胁迫锻炼过程中 ,质膜透性增大 ,O- · 及 H2 O2 含量增多 ,CAT活性升高 ,叶绿素含量降低 ,低浓度 H2 O2 胁迫使SOD活性上升 ,高浓度时却使其活性下降。经过 H2 O2 胁迫锻炼后的小麦遭受干旱胁迫时 ,叶绿素含量、SOD活性、CAT活性均高于对照组 ,而质膜透性、O- · 及 H2 O2 含量却低于对照组。表明 H2 O2 胁迫锻炼 ,提高了小麦幼苗的抗氧化能力 ,增强了其抗旱性更多还原

【Abstract】 The contents of O -· \-2 and H 2O 2,plasmalemma permeability and CAT activity in 12 d spring wheat seedlings increased during 1 mmol·L -1 and 10 mmol·L -1 H 2O 2 stress hardening,but the Chl content decreased,and SOD activity increased (1 mmol·L -1 H 2O 2 stress) or decreased (10 mmol·L -1 H 2O 2 stress).However,the contents of O -· \-2 and H 2O 2,plasmalemma permeability in spring wheat seedlings exposed to drought stress after H 2O 2 stress hardening were lower than control wheat,and SOD activity,CAT activity,Chl content were higher than control wheat.These results suggest that H 2O 2 stress hardening enhanced oxidative stress resistance of wheat seedlings,and then increased its drought resistance.更多还原