| 抗氧化剂对渗透胁迫下沙棘叶片膜脂过氧化的保护作用 |
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| 引用本文： | 魏宇昆,梁宗锁,李丽霞,韩蕊莲.抗氧化剂对渗透胁迫下沙棘叶片膜脂过氧化的保护作用[J].西北林学院学报,2001,16(1):5-8. |
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| 作者姓名： | 魏宇昆 梁宗锁 李丽霞 韩蕊莲 |
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| 作者单位： | 西北农林科技大学 生命科学学院,; 中国科学院 水土保持研究 所, |
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| 基金项目： | 黄河上中游管理局科研专项基金资助(1997001)和杨凌农业开发基金(2000J-24)资助。 |
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| 摘 要： | 以沙棘叶片为材料，研究了外源抗氧化物质Vc、VE、β-胡萝卜素等对PEG渗透胁迫下细胞膜的保护作用。结果表明:加入外源Vc、β-胡萝卜素能有效保护膜系统，使膜透性和丙二醛在胁迫条件下增加小于对照，尤其在胁迫前期作用明显，而对叶绿素的保护作用在后期表现更突出，使叶绿素含量维持在较高水平;外源VE对防止膜透性增加作用不大，对减低丙二醛含量与保护叶绿素方面有所贡献。同时也证明沙棘叶片内Vc在渗透胁迫下含量下降，而Pro含量显著升高。证明这些物质是构成沙棘抗旱性的重要基础。
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| 关 键 词： | 抗氧化剂 渗透胁迫 沙棘 |
| 文章编号： | 1001-7461(20 01)01-0005-04 |
| 修稿时间： | 2000年10月16 |
Effect of Anti-oxidation Marttor to Protective Function on Cell Membrane of Se abuckthorn Leaf under PEG Osmotic Stress |
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| WEI Yu-kun,LIANG Zong-suo,LI Li-xia,HAN Rui-lian.Effect of Anti-oxidation Marttor to Protective Function on Cell Membrane of Se abuckthorn Leaf under PEG Osmotic Stress[J].Journal of Northwest Forestry University,2001,16(1):5-8. |
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| Authors: | WEI Yu-kun LIANG Zong-suo LI Li-xia HAN Rui-lian |
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| Institution: | The protective function of exogenous anti-oxidation matter including Vc 、VE and β-carotene on cell membrane of seabuckthorn leaf under PEG osmotic stress was analyzed.The results showed that applied exodenous Vc and β-carotene could pr otect membrane syst |
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| Abstract: | The protective function of exogenous anti-oxidation matter including Vc 、VE and β-carotene on cell membrane of seabuckthorn leaf under PEG osmotic stress was analyzed.The results showed that applied exodenous Vc and β-carotene could pr otect membrane system from osmotic stress effectively, which displayed that the ran ge of increasment of membrane permeability and MDA content were lower that of co ntrol.The protective effect was significant especially at early stage of osmotic stress.While the protective function on chlorophyll was prominent at later sta ge and chlorophyll content was kept in higer level all along; exogenous VE had a l ittle effect on the avoidance of the increasement of membrane permeability.On th e other hand, it contributed to the reduction of MDA content and the protection o f chlorophyll.Vc content of seabuckthorn leaf declined while Pro content incre ased evidently under osmotic stress were also tested .It is proved that these materials were the important factor in constitution of drought-resistance capa bility of seabuckthorn. |
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| Keywords: | anti oxidation osmotic stress seabuckthorn |
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