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相似文献

1
Field concentration and temperature dependence of fluorescence polarization of magnetically oriented chloroplasts.磁取向叶绿体荧光偏振的场浓度和温度依赖性
Biophys J. 1982 Jul;39(1):1-5. doi: 10.1016/S0006-3495(82)84483-4.
2
Orientation of emitting dipoles of chlorophyll A in thylakoids: considerations on the orientation factor in vivo.类囊体中叶绿素A发射偶极子的取向：关于体内取向因子的思考
Biophys J. 1981 Jun;34(3):423-37. doi: 10.1016/S0006-3495(81)84860-6.
3
Photovoltages in suspensions of magnetically oriented chloroplasts.磁取向叶绿体悬浮液中的光电压。
Biochim Biophys Acta. 1978 Sep 7;503(3):545-54. doi: 10.1016/0005-2728(78)90152-4.
4
[Polarization fluorescence of chloroplasts oriented in polyacrylamide gel. Experiment and theoretical analysis].
Mol Biol (Mosk). 1983 Nov-Dec;17(6):1204-11.
5
Anisotropy of photosynthetic membranes and the degree of fluorescence polarization.
Biochim Biophys Acta. 1976 Sep 13;440(3):531-44. doi: 10.1016/0005-2728(76)90040-2.
6
Reorganization of thylakoid components during chloroplast development in higher plants.高等植物叶绿体发育过程中类囊体成分的重组
Prog Clin Biol Res. 1982;102 Pt B:171-88.
7
Orientation of the hemes of high potential cytochromes relative to photosynthetic membranes, as shown by the linear dichroism of oriented preparations.通过定向制剂的线性二色性显示的高电位细胞色素血红素相对于光合膜的取向。
Biochim Biophys Acta. 1980 Dec 3;593(2):299-311. doi: 10.1016/0005-2728(80)90067-5.
8
Evidence that circularly dichroic chlorophyll forms a-682 and a-710 are oriented at right angles to the thylakoid membranes of whole chloroplasts, and that the circular dichroism is light-dependent.圆二色性叶绿素a-682和a-710与完整叶绿体的类囊体膜呈直角排列，且圆二色性依赖于光的证据。
Biochem J. 1975 Jun;148(3):487-97. doi: 10.1042/bj1480487.
9
Theory of fluorescence polarization in magnetically oriented photosynthetic systems.磁取向光合系统中的荧光偏振理论。
Biophys J. 1978 Dec;24(3):689-712. doi: 10.1016/S0006-3495(78)85414-9.
10
[Spectral anisotropy of chloroplasts, subchloroplast particles and pigment-protein complexes].
Biofizika. 1981 Mar-Apr;26(2):288-94.

引用本文的文献

1
Impact of a high magnetic field on the orientation of gravitactic unicellular organisms--a critical consideration about the application of magnetic fields to mimic functional weightlessness.强磁场对趋重力单细胞生物取向的影响——关于应用磁场模拟功能失重的关键思考
Astrobiology. 2014 Mar;14(3):205-15. doi: 10.1089/ast.2013.1085.
2
The light-harvesting chlorophyll a/b protein acts as a torque aligning chloroplasts in a magnetic field.捕光叶绿素 a/b 蛋白作为一种扭转力，可以在磁场中排列叶绿体。
Photosynth Res. 1986 Jan;10(3):217-22. doi: 10.1007/BF00118286.

本文引用的文献

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ON THE MAGNETIC ASYMMETRY OF MUSCLE FIBERS.论肌纤维的磁不对称性。
Proc Natl Acad Sci U S A. 1958 Jan;44(1):1-4. doi: 10.1073/pnas.44.1.1.
2
The flattening of the absorption spectrum of suspensions, as compared to that of solutions.与溶液相比，悬浮液吸收光谱的扁平化。
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Orientation of membrane fragments by electric field.通过电场使膜片段定向。
Biochim Biophys Acta. 1980 Jun 6;598(3):429-36. doi: 10.1016/0005-2736(80)90023-1.
4
Orientation of emitting dipoles of chlorophyll A in thylakoids: considerations on the orientation factor in vivo.类囊体中叶绿素A发射偶极子的取向：关于体内取向因子的思考
Biophys J. 1981 Jun;34(3):423-37. doi: 10.1016/S0006-3495(81)84860-6.
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Magnetic field induced orientation of photosynthetic systems.磁场诱导光合系统的取向
Biochim Biophys Acta. 1972 Apr 20;267(1):65-79. doi: 10.1016/0005-2728(72)90138-7.
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[Rotation of external segments of photoreceptors in constant magnetic field].[恒定磁场中光感受器外节的旋转]
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7
Orientation of pigments and structural proteins in the photosynthetic membrane of spinach chloroplasts: a linear dichroism study.菠菜叶绿体光合膜中色素和结构蛋白的取向：线性二色性研究
Biochim Biophys Acta. 1973 Jul 26;314(1):42-56. doi: 10.1016/0005-2728(73)90062-5.
8
Polarized light spectroscopy of photosynthetic membranes in magneto-oriented whole cells and chloroplasts. Fluorescence and dichroism.磁取向全细胞和叶绿体中光合膜的偏振光光谱学。荧光与二向色性。
Biochim Biophys Acta. 1974 Jun 28;347(3):443-63. doi: 10.1016/0005-2728(74)90082-6.
9
Direct observation of the rotation in a constant magnetic field of highly organized lamellar structures.在恒定磁场中对高度有序的层状结构的旋转进行直接观察。
FEBS Lett. 1975 Feb 1;50(2):257-60. doi: 10.1016/0014-5793(75)80502-3.
10
X-ray diffraction from chloroplast membranes oriented in a magentic field.来自在磁场中取向的叶绿体膜的X射线衍射。
FEBS Lett. 1976 Sep 1;67(3):289-93. doi: 10.1016/0014-5793(76)80549-2.

磁取向叶绿体荧光偏振的场浓度和温度依赖性

Field concentration and temperature dependence of fluorescence polarization of magnetically oriented chloroplasts.

作者信息

Papp E, Meszéna G

出版信息

Biophys J. 1982 Jul;39(1):1-5. doi: 10.1016/S0006-3495(82)84483-4.

DOI:10.1016/S0006-3495(82)84483-4
PMID:7104444
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC1328903/
Abstract

Chloroplasts in higher magnetic fields align with their equatorial plane perpendicular to the field. Because of the nonrandom orientation of the chromophores in the membrane the fluorescence radiation will be partially polarized. The chloroplast concentration, magnetic field, and temperature dependence of the fluorescence polarization has been investigated. The results are compared with a simplified model calculation. It is shown that the concentration dependence can be related to the linear dichroism of the fluorescence radiation and self-adsorption. Taking these effects into account results in the calculation of a higher fluorescence polarization (FP) ratio and higher inclination of chlorophyll dipoles to the membrane plane. Analyzing the magnetic field dependence of the FP ratio, we conclude that in a magnetic field not only will be chloroplasts be aligned, but the thylakoid stacks as well. A decrease in the FP ratio was observed around 20 degrees C. It is suggested that this decrease reflects a phase transition in the photosynthetic membrane.

摘要

在较高磁场中，叶绿体的赤道平面会与磁场垂直排列。由于膜中发色团的非随机取向，荧光辐射会部分偏振。研究了叶绿体浓度、磁场以及荧光偏振的温度依赖性。将结果与简化的模型计算进行了比较。结果表明，浓度依赖性可能与荧光辐射的线性二向色性和自吸收有关。考虑到这些影响，计算得出的荧光偏振（FP）比值更高，且叶绿素偶极子相对于膜平面的倾斜度更大。通过分析FP比值的磁场依赖性，我们得出结论，在磁场中不仅叶绿体，类囊体堆叠也会排列整齐。在20摄氏度左右观察到FP比值下降。有人认为这种下降反映了光合膜中的相变。