| 盐胁迫对沙冬青幼苗生长与生理特性的影响 |
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| 引用本文： | 李婧男,刘强,贾志宽,王平平.盐胁迫对沙冬青幼苗生长与生理特性的影响[J].植物研究,2009,29(5):553-558. |
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| 作者姓名： | 李婧男 刘强 贾志宽 王平平 |
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| 作者单位： | (1.西北农林科技大学农学院，杨凌712100) ;(2.天津师范大学化学与生命科学学院，天津300387) |
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| 基金项目： | “十一五”国家科技支撑计划项目(2006BAD29B03) |
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| 摘 要： | 水培条件下，对沙冬青幼苗以不同浓度的NaCl溶液进行处理，并测定其相关生理指标。结果显示：随着盐浓度的增加，叶绿素含量与叶绿素荧光参数（Fv/Fo和Fv/Fm）逐渐降低，丙二醛含量升高。超氧化物歧化酶（SOD）和过氧化物酶（POD）活性随着盐浓度的升高表现出先上升后下降的趋势，0.7%盐胁迫下的幼苗POD酶活性最高，1.0%和1.3%盐胁迫下的酶活性逐渐降低，而过氧化氢酶（CAT）的活性呈持续上升趋势。各处理渗透调节物质脯氨酸的含量较对照明显增加，可溶性糖含量在根中升幅较大，叶片增幅不明显。幼苗死亡率也随着胁迫程度的加剧而升高，当浓度达到1.0%和1.3%时幼苗死亡率较高，分别达到了53.33%和76.67%。研究表明，低浓度盐胁迫下（0.7%以下），沙冬青幼苗表现出较强的抗性；当盐浓度升高到1.0%和1.3%时，其生长受到严重影响。
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| 关 键 词： | 盐胁迫 沙冬青 幼苗 生理特性 |
Effects of Salt Stress on Growth and Physiological Characteristic of Ammopiptanthus mongolicus seedlings |
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| LI Jing-Nan LIU Qiang JIA Zhi-Kuan WANG Ping-Ping.Effects of Salt Stress on Growth and Physiological Characteristic of Ammopiptanthus mongolicus seedlings[J].Bulletin of Botanical Research,2009,29(5):553-558. |
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| Authors: | LI Jing-Nan LIU Qiang JIA Zhi-Kuan WANG Ping-Ping |
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| Institution: | 1.College of Agronomy;Northwest A&F University;Yangling 712100;2.College of Chemistry and life Science;Tianjin Normal University;Tianjin 300387 |
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| Abstract: | The Ammopiptanthus mongolicus seedlings were treated with different NaCl concentrations under water culture.Morphological indices and physiological indices were measured and analyzed.The result indicated that:Along with the increase of salt concentrations,the chlorophyll contents and the fluorescent parameters(Fv/Fo and Fv/Fm) decreased,the MDA contents increased.The activity of superoxide dismutase(SOD) and peroxidase(POD) first rose and then decreased as the salt concentration increased;the seedlings unde... |
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| Keywords: | NaCl stress Ammopiptanthus mongolicus seedlings physiological characteristic |
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