EffectsofCeCl3onEnergyTransferandOxygenEvolutioninSpinachPhotosystemⅡ

被引：4

作者：

刘晓晴 ^{[1
]}

苏明玉 ^{[1
]}

刘超 ^{[1
]}

张璐 ^{[1
]}

司文会 ^{[2
]}

洪法水 ^{[1
]}

机构：

[1] College of Life Sciences, Suzhou University

[2] Suzhou Polytechnical Institute of Agriculture

来源：

JournalofRareEarths | 2007年 / 05期

关键词：

CeCl3; spinach; photosystem; Ⅱ; spectral characteristics; energy transfer; oxygen evolution; rare earths;

D O I：

暂无

中图分类号：

Q945 [植物生理学];

学科分类号：

0903 ;

摘要：

Due to 4f electron characteristics and alternation valence, cerium involved in an oxidation-reduction reaction in plant, closely relating to photosynthesis. Our studies proved that cerium could promote photosynthesis and greatly improve spinach growth. However, the mechanism of promoting energy transfer and conversion by cerium remains unclear. Here we reported that the effects of Ce3+ on energy transfer and oxygen evolution in photosystem Ⅱ(PSⅡ) isolated from spinach, which was related to 4f electron characteristics and alternation valence in Ce molecule. The methods of absorption spectrum, fluorescence spectrum were used in the research. Results showed that Ce3+ treatment at low concentration could suitably change PSⅡ microenvironment, increase the absorbance of visible light, improve the energy transfer among amino acids within PSⅡ protein-pigment complex, and accelerate energy transport from tyrosine residue to chlorophyll a. In summary, the photochemical activity of PSⅡ(fluorescence quantum yield) and its oxygen evolving rate were enhanced by Ce3+.

引用

页码：624 / 630

页数：7

共 6 条

[1]

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