| Effects of Lanthanum on Redox Systems in Plasma Membranes of Casuarina equisetifolia Seedlings Under Acid Rain Stress |
| |
| 作者姓名： | 李裕红 严重玲 刘景春 Mohammed Almasri 梁洁 张瑞锋 |
| |
| 作者单位： | School of Life Sciences，Xiamen University，School of Life Sciences，Xiamen University，School of Life Sciences，Xiamen University，School of Life Sciences，Xiamen University，School of Life Sciences，Xiamen University，School of Life Sciences，Xiamen University Xiamen 361005，China，Department of Biology，Quanzhou Normal College，Quanzhou 362000，China，Xiamen 361005，China，Xiamen 361005，China，Xiamen 361005，China，Xiamen 361005，China，Xiamen 361005，China |
| |
| 基金项目： | ProjectsupportedbythNationalNaturalScienceFoundationofChina ( 3 0 170 190 )，KeyNaturalScienceFoundationofFujian
Province (D0 12 0 0 0 1)andScientificResearchFoundationofQuanzhouNormalCollege ( 2 0 0 2LI0 4) |
| |
| 摘 要： | Theplasmamembraneisapenetrablebarrier ,whichcancontroltheexchangeofsubstancesacrossmembranesincells ,andalsoistheintermediumandreceptorofenergyorinformationtransferencebetweencellsandenvironment.Theplasmamembraneredoxsystem(PMRS)meanstheelectrontransferchainsonplasmamembrane .Owingtohavethepossibilityofejectingprotons ,energizingplasmamembraneandhavingthefunctionofacceleratingtransportationofsoluteacrossmembrane ,theplasmamembraneredoxsystemswerepaidmuchattentionto1] .Acidrainisoneofthemost…
|
| 关 键 词： | 镧系元素 氧化还原剂 生态学 酸雨 稀土 木麻黄 质膜 |
Effects of Lanthanum on Redox Systems in Plasma Membranes of Casuarina equisetifolia Seedlings Under Acid Rain Stress |
| |
| Mohammed Almasri.Effects of Lanthanum on Redox Systems in Plasma Membranes of Casuarina equisetifolia Seedlings Under Acid Rain Stress[J].Journal of Rare Earths,2003,21(5):577-581. |
| |
| Authors: | Mohammed Almasri |
| |
| Abstract: | The effects of lanthanum on some redox system(PMRS) properties of the plasma membrane(PM) vesicles from Casuarina equisetifolia seedlings under artificial acid rain(pH 4.5)stress were studied. The results show that there are NADH oxidase and EDTA-Fe3+ reductase, and nitrate reductase in the seedling PM, and they have different responses to soaking seeds for 8 h in a series of LaCl3 solution. The NADH oxidase activities and the Nitrate reductase activities can be stimulated when La3+ concentrations is in the range of 50～200 mg*L-1, but their activities are inhibited or fluctuate by the higher La3+ concentrations. The EDTA-Fe3+ reductase activities can be stimulated by La3+ concentrations in the range of 50～400 mg*L-1. The research also revealed that La3+ reduces the relative permeability of membranes and have the function in protecting membranes under acid rain stress by the way of inhibiting the leakage of electrolyte. |
| |
| Keywords: | ecology PM redox system lanthanum Casuarina equisetifolia acid rain stress rare earths |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
