| 不同CO2浓度下渗透胁迫对小麦膜伤害的影响 |
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| 引用本文： | 徐仰仓,王静,林久生,王根轩.不同CO2浓度下渗透胁迫对小麦膜伤害的影响[J].生态学杂志,2000,0(6):878-880. |
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| 作者姓名： | 徐仰仓 王静 林久生 王根轩 |
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| 作者单位： | 兰州大学干旱农业生态国家重点实验室, 兰州730000 |
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| 基金项目： | 国家自然科学基金(39770447);国家重点基础研究专项经费资助项目(G1999011705) |
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| 摘 要： | 研究了常规CO2(350μl·L-1)和CO2倍增(700μl·L-1)环境中生长的春小麦幼苗,渗透胁迫时叶片中活性氧含量的变化和质膜透性的变化.结果表明,生长在CO2倍增环境中的春小麦幼苗,渗透胁迫时O2·-及H2O2的增长幅度均小于常规CO2浓度下生长的春小麦幼苗.质膜透性的增长幅度也是前者小于后者.据此认为,CO2浓度倍增可以减轻渗透胁迫对质膜的氧化伤害,提高植物的抗旱力.
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| 关 键 词： | 小麦 CO2浓度 渗透胁迫 活性氧 膜伤害 |
| 收稿时间： | 1999-10-29 |
Effect of osmotic stress on wheat membrane injury under different CO2 concentrations |
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| XU Yangcang,WANG Jin,LIN Jiusheng,WANG Genxuan.Effect of osmotic stress on wheat membrane injury under different CO2 concentrations[J].Chinese Journal of Ecology,2000,0(6):878-880. |
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| Authors: | XU Yangcang WANG Jin LIN Jiusheng WANG Genxuan |
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| Institution: | State Key Laboratory of Arid Agroecology, Lanzhou University, Lanzhou 730000 |
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| Abstract: | This paper studied the variation of active oxygen content and membrane permeability in leaves of spring wheat seedling exposed to osmotic stress under normal 350μl·L-1 and doubled CO2 concentration 700μl·L-1.The results indicate that the increasing rate of O2·- and H2O2,and the membrane permeability in wheat leaves exposed to osmotic stress in normal CO2 concentration were higher than those in doubled CO2.Accordingly,it is suggested that doubled CO2 can reduce the membrane oxidative injury caused by osmotic stress,and increase plant drought resistance. |
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| Keywords: | Wheat CO2 concentration Osmotic stress Active oxygen Membrane injury |
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