| Literature DB >> 18186002 |
Zheng Lei1, Su Mingyu, Wu Xiao, Liu Chao, Qu Chunxiang, Chen Liang, Huang Hao, Liu Xiaoqing, Hong Fashui.
Abstract
A proven photocatalyst, titanium dioxide in the form of nano-anatase, is capable of undergoing electron transfer reactions under light. In previous studies, we had proven that nano-anatase could absorb ultraviolet light (UV-B) and convert light energy to stable chemistry energy finally via electron transport in spinach chloroplasts. The mechanisms by which nano-anatase promotes antioxidant stress in spinach chloroplasts under UV-B radiation are still not clearly understood. In the present paper, we investigate the effects of nano-anatase on the antioxidant stress in spinach chloroplasts under UV-B radiation. The results showed that nano-anatase treatment could significantly decrease accumulation of superoxide radicals O2.-, hydrogen peroxide (H2O2), and malonyldialdehyde (MDA) content, and increase activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), guaiacol peroxidase (GPX), and elevate evolution oxygen rate in spinach chloroplasts under UV-B radiation. Together, nano-anatase could decrease the oxidative stress to spinach chloroplast caused by UV-B radiation.Entities:
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Year: 2007 PMID： 18186002 DOI： 10.1007/s12011-007-8028-0
Source DB: PubMed Journal: Biol Trace Elem Res ISSN： 0163-4984 Impact factor: 3.738