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Promotion of Energy Transfer and Oxygen Evolution in Spinach Photosystem II by Nano-anatase TiO2

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An Erratum to this article was published on 26 June 2009

Abstract

Being a proven photocatalyst, nano-anatase is capable of undergoing electron transfer reactions under light. In previous studies we had proven that nano-anatase improved photosynthesis and greatly promoted spinach growth. The mechanisms by which nano-anatase promotes energy transfer and the conversion efficiency of the process are still not clearly understood. In the present paper, we report the results obtained with the photosystem II (PSII) isolated from spinach and treated by nano-anatase TiO2 and studied the effect of nano-anatase TiO2 on energy transfer in PSII by spectroscopy and on oxygen evolution. The results showed that nano-anatase TiO2 treatment at a suitable concentration could significantly change PSII microenvironment and increase absorbance for visible light, improve energy transfer among amino acids within PSII protein complex, and accelerate energy transport from tyrosine residue to chlorophyll a. The photochemical activity of PSII (fluorescence quantum yield) and its oxygen-evolving rate were enhanced by nano-anatase TiO2. This is viewed as evidence that nano-anatase TiO2 can promote energy transfer and oxygen evolution in PSII of spinach.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (grant no. 20671067, 30470150) and by the Jiangsu Province Universities Natural Science Foundation (grant no. 06KJB180094, 03KJB180122).

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Authors and Affiliations

  1. College of Life Science, Suzhou University, Suzhou, 215123, People’s Republic of China

    Su Mingyu, Wu Xiao, Liu Chao, Qu Chunxiang, Liu Xiaoqing, Chen Liang, Huang Hao & Hong Fashui

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  1. Su Mingyu
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  2. Wu Xiao
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  3. Liu Chao
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  4. Qu Chunxiang
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  6. Chen Liang
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  7. Huang Hao
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  8. Hong Fashui
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Correspondence to Hong Fashui.

Additional information

An erratum to this article is available at http://dx.doi.org/10.1007/s12011-009-8425-7.

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Mingyu, S., Xiao, W., Chao, L. et al. Promotion of Energy Transfer and Oxygen Evolution in Spinach Photosystem II by Nano-anatase TiO2 . Biol Trace Elem Res 119, 183–192 (2007). https://doi.org/10.1007/s12011-007-0065-1

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