NDLI: The Regulation of TiO$_{2}$ Nanoparticles on the Expression of Light-Harvesting Complex II and Photosynthesis of Chloroplasts of Arabidopsis thaliana

Content Provider	Springer Nature Link
Author	Ze, Yuguan Liu, Chao Wang, Ling Hong, Mengmeng Hong, Fashui
Copyright Year	2010
Abstract	Recent studies demonstrated that titanium dioxide nanoparticles (TiO$_{2}$ NPs) could significantly promote photosynthesis and plant growth, but its mechanism is still unclear. In this article, we studied the mechanism of light absorption and transfer of chloroplasts of Arabidopsis thaliana caused by TiO$_{2}$ NPs treated. The results showed that TiO$_{2}$ NPs could induce significant increases of light-harvesting complex II (LHCII) b gene expression and LHCII II content on the thylakoid membrane in A. thaliana, and the increases in LHCII were higher than the non-nano TiO$_{2}$ (bulk-TiO$_{2}$) treatment. Meanwhile, spectroscopy assays indicated that TiO$_{2}$ NPs obviously increased the absorption peak intensity of the chloroplast in red and blue region, the fluorescence quantum yield near 680 nm, the excitation peak intensity near 440 and 480 nm and/or near 650 and 680 nm of the chloroplast. TiO$_{2}$ NPs treatment could reduce F $_{480}$/F $_{440}$ ratio and increase F $_{650}$/F $_{680}$ ratio and accelerate the rate of whole chain electron transport and oxygen evolution of the chloroplast. However, the photosynthesis improvement of the non-nanoTiO$_{2}$ treatment was far less effective than TiO$_{2}$ NPs treatment. Taken together, TiO$_{2}$ NPs could promote the light absorption of chloroplast, regulate the distribution of light energy from PS I to PS II by increasing LHCII and accelerate the transformation from light energy to electronic energy, water photolysis, and oxygen evolution.
Starting Page	1131
Ending Page	1141
Page Count	11
File Format	PDF
ISSN	01634984
Journal	Biological Trace Element Research
Volume Number	143
Issue Number	2
e-ISSN	15590720
Language	English
Publisher	Humana Press Inc
Publisher Date	2010-11-23
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Titanium dioxide particles Arabidopsis thaliana Energy distribution LHCII expression Oncology Biotechnology Biochemistry Nutrition
Content Type	Text
Resource Type	Article
Subject	Biochemistry (medical) Endocrinology, Diabetes and Metabolism Clinical Biochemistry Biochemistry Inorganic Chemistry

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