| 镉胁迫对烟草根抗氧化能力和激素含量的影响 |
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| 引用本文： | 袁祖丽,吴中红.镉胁迫对烟草根抗氧化能力和激素含量的影响[J].生态学报,2010,30(15):4109-4118. |
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| 作者姓名： | 袁祖丽 吴中红 |
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| 作者单位： | 河南农业大学生命科学学院,河南,郑州450002 |
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| 基金项目： | 河南省教育厅自然基金资助项目(2006180012) |
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| 摘 要： | 采用水培试验,研究了镉胁迫对烟草(Nicotiana tabacum)根内的超氧阴离子含量、可溶性蛋白质含量、抗氧化系统SOD、POD、CAT、APX、GR活性、膜质过氧化水平及激素IAA、ABA、GA3、ZR含量的影响。结果显示烟草根中的超氧阴离子含量随着镉浓度增大而升高;镉浓度为5mg/L时,可溶性蛋白质含量增加,但随着镉浓度增加,可溶性蛋白质含量急剧下降;SOD、CAT、APX活性在镉浓度为5mg/L时上升,但随着镉浓度升高其活性下降;POD,GR活性在镉浓度为5-25mg/L时上升,在镉浓度为50mg/L时下降,但仍高于对照;MDA含量随着镉浓度增加而升高;IAA氧化酶活性在镉浓度5mg/L时下降,但随着镉浓度的升高而降低;IAA含量在镉浓度为5mg/L时上升,但随着镉浓度增加,IAA氧化酶活性升高,导致IAA含量逐渐下降;镉胁迫对烟草根中ABA合成表现为促进作用;GA3含量在镉浓度为5mg/L时上升,但随着镉浓度的增加其含量逐渐下降;ZR含量在镉胁迫下迅速减少。
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| 关 键 词： | 镉 烟草 根 抗氧化能力 激素 |
| 收稿时间： | 2009/8/20 0:00:00 |
| 修稿时间： | 4/6/2010 12:00:00 AM |
Effect of cadmium on antioxidative capability and phytohormone level in tobacco roots |
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| YuanZuLi and WuZhongHong.Effect of cadmium on antioxidative capability and phytohormone level in tobacco roots[J].Acta Ecologica Sinica,2010,30(15):4109-4118. |
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| Authors: | YuanZuLi and WuZhongHong |
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| Institution: | Henan Agricultural University,Henan Agricultural University |
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| Abstract: | Cadmium(Cd) is one of major environmental pollutants mainly emanating from mining,industrial trash,anthropogenic activity and use of agro-chemicals.Even in trace concentrations,Cd can cause serious problems to all organisms.In most plant species,Cd accumulated in the roots and was mainly retained in insoluble and soluble forms.Cd inhibited root growth,damaged root hair and root tips by modifying lipid composition of root plasma membrane,increasing the levels of lipid peroxidation.However,it is still unclear... |
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| Keywords: | cadmium tobacco roots antioxidative capability phytohormones |
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