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| 干旱与氧化胁迫对小麦根氧化还原状态和叶片ABA积累的影响 | |
| 引用本文： | 赵志光,李海燕,陈拓,王海庆,安黎哲,陈国仓.干旱与氧化胁迫对小麦根氧化还原状态和叶片ABA积累的影响[J].西北植物学报,2006,26(4):736-742. |
| 作者姓名： | 赵志光 李海燕 陈拓 王海庆 安黎哲 陈国仓 |
| 作者单位： | 1. 兰州大学,干旱与草地生态教育部重点实验室,兰州,730000 2. 中国科学院寒区旱区环境与工程研究所,兰州,730000 3. 中国科学院西北高原生物研究所,西宁,810001 4. 兰州大学,干旱与草地生态教育部重点实验室,兰州,730000;中国科学院寒区旱区环境与工程研究所,兰州,730000 |
| 基金项目： | 中国科学院"百人计划";甘肃省农林生物技术项目;中国科学院"西部之光"人才培养计划 |
| 摘 要： | 通过分析一氧化氮(nitric oxide,NO)、活性氧(reactive oxygen species,ROS)和干旱胁迫对小麦根氧化还原状态和叶片脱落酸(abscisic acid,ABA)积累的影响,探讨了干旱胁迫下NO和H2O2调节ABA合成的可能机制。结果表明:干旱胁迫处理初期小麦根还原型谷胱甘肽含量降低、抗氧化酶活性发生振荡变化,细胞氧化还原状态向氧化型转变。NO和H2O2能模拟干旱胁迫的作用使细胞状态向氧化型转变,还可以使小麦叶片ABA积累量上升。干旱胁迫下NO和H2O2对ABA合成的调节作用可能是通过调节细胞氧化还原状态进行。 |
| 关 键 词： | 一氧化氮 活性氧 脱落酸 谷胱甘肽 氧化还原状态 |
| 文章编号： | 1000-4025（2006）04-0736-07 |
| 收稿时间： | 2005-09-15 |
| 修稿时间： | 2005-09-152006-02-16 |
Effects of Drought and Oxidative Stresses on Redox Status in Wheat Roots and ABA Accumulation in Wheat Leaves |
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| ZHAO Zhi-guang,LI Hai-yan,CHEN Tuo,WANG Hai-qing,AN Li-zhe,CHEN Guo-cang.Effects of Drought and Oxidative Stresses on Redox Status in Wheat Roots and ABA Accumulation in Wheat Leaves[J].Acta Botanica Boreali-Occidentalia Sinica,2006,26(4):736-742. | |
| Authors: | ZHAO Zhi-guang LI Hai-yan CHEN Tuo WANG Hai-qing AN Li-zhe CHEN Guo-cang |
| Institution: | 1. Key Laboratory of Arid and Pasture Ecology of Ministry of Education,Lanzhou University, Lanzhou 730000 ,China;2. Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences ,Lanzhou 730000,China;3 Northwest Institute of Plateau Biology,Chinese Academy of Sciences ,Xining 810001 ,China |
| Abstract: | The study presented in this paper probed the effects of nitric oxide, reactive oxygen species and drought stress on redox status in the roots and ABA accumulation in the leaves of wheat as well as the mechanism by which nitric oxide and reactive oxygen species regulated ABA synthesis under drought stress. The results indicated that in the beginning period of drought stress,the roots showed a decreased reductive glutathione contents fluctuated activity of antioxidative enzymes,and a cellular transition from reductive status to oxidative status. NO and H2O2 could lead to the cellular transition towards oxidative status by simulating the effect of drought stress, and they could also increase ABA accumulation in wheat leaves. Under drought stress,NO and H2O2 probably exerted their regulating effect on ABA synthesis by regulating cellular redox status. |
| Keywords: | nitric oxide reactive oxygen ABA glutathione redox status |
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