金属离子胁迫产生植物膜脂过氧化的能力与离子的极化能力正相关
Lipid Peroxidation Induced by Metal Ion Stress is Positively Related to Lonic Polarization in Plants
查看参考文献12篇
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文摘
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金属离子胁迫导致植物产生多种生理损伤，其中包括膜脂的过氧化。不同的金属离子诱导植物产生膜脂过氧化差异很大，迄今对这些差异与金属离子性质之间的具体关系所知甚少。金属离子对阴离子和其他分子的作用主要取决于其电荷数量、半径大小和电子层结构，亦即取决于其极化作用。作者以水培拟南芥与油菜为材料，以不同极化作用的金属离子（Li~+、Na~+、K~+、Ca~(2+)、Fe~(2+)与Fe~(3+)）为研究对象，检测了极化作用不同的金属离子胁迫拟南芥与油菜1、3、Sd后膜脂过氧化产物丙二醛(Malondialdehyde， MDA)的含量变化。结果发现，相同浓度的一价离子Li~+、Na~+与K~+胁迫5d后，离子半径较小的Li~+诱导拟南芥与油菜产生的丙二醛比Na~+与K~+高2倍以上；相同浓度下电子层结构相同的Fe~(3+)与Fe~(2+)胁迫5d后，电荷高的Fe~(3+)诱导拟南芥产生的丙二醛比Fe~(2+)高2倍以上，而Fe~(3+)诱导油菜产生的丙二醛比Fe~(2+)高5倍以上；相同浓度的二离子Fe~(2+)与Ca~(2+)胁迫，电子层结构复杂的Fe~(2+)比Ca~(2+)诱导更多的丙二醛产生。运用离子势综合表征离子极化能力，则丙二醛的含量与离子势大小显著正相关。上述结果说明，金属离子诱导膜脂过氧化的胁迫能力与金属极化作用正相关，即电荷越高、离子半径越小及电子层越复杂，产生氧化胁迫程度越强。 |
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其他语种文摘
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Metal ion stress results in a variety of physiological damage to plants,including membrane lipid peroxidation.The effects of different metal ions on the membrane lipid peroxidation are various,and so far,the little knowledge about the relationship between lipid peroxidation and characteristics of metal ions is known.The physical and chemical effects of metal ions on the anions and other moleculars depend on the polarization of metal ions,such as the amount of charge,radius and electron shell structure.In this study,the stresses caused by metal ions with different ionic polarization on hydroponic Arabidopsis thaliana and Brassica napus seedings were investigated,and the production of Malondialdehyde (M)A)of both plants incubated to different metal ions for 1 ,3 and 5 days were tested.The results indicated that with the same concentration treatment,Li~+ induced more production of MDA than that of Na~+ and K~+ ,Fe~(3+)induced more production than that of Fe~(2+),and Fe~(2+)induced more production than that of Ca~(2+).That is,with the same amount of metal ions,the smaller ion radius,higher ion potential and more complicated electronic shell,the more MDA were produced in plants.The results suggested that there was positive relationship between the ability of inducing MDA production and the ionic polarization,that is,the higher charge,smaller ionic radius and more complex the electron shell,the more severe oxidative stress were induced. |
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来源
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植物分类与资源学报
,2011,33(3):293-298 【核心库】
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关键词
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拟南芥
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油菜
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金属离子
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丙二醛
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离子势
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地址
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1.
中国科学院昆明植物研究所, 云南, 昆明, 650204
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红河学院, 云南, 蒙自, 661100
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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2095-0845 |
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学科
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植物学 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:4241722
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