期刊
ENVIRONMENTAL POLLUTION
卷 176, 期 -, 页码 63-70出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2013.01.027
关键词
Ulmus elongata; Photosynthetic characteristics; Nano-titanium dioxide (TiO2); Stomatal limitation; Fourier transform infrared spectroscopy
资金
- National Natural Science Foundation of China [41030638, 41275169]
- Natural Science Foundation of Zhejiang Province [Y5090339]
The physiological and ecological responses of Ulmus elongata to different concentrations of nano-anatase TiO2 solutions were investigated in this study and we found that with foliar application of 0.1% (T1), 0.2% (T2) and 0.4% (T3) nano-anatase TiO2 solution the net photosynthetic rate of U. elongata seedlings were lower, comparing with the control (CK) (no spraying). TiO2 solution had no effect on the carbon isotope values (delta C-13), indicating the lower photosynthetic capacity was not caused by stomatal limitation. The nitrogen isotope values (delta N-15) decreased, but the foliar metal elements, such as Mg, K and Mn contents were not affected by nano-anatase TiO2 which promoted the Cu uptake. Fourier transform infrared spectroscopy showed that the nano-anatase TiO2 enhanced the absorbance of U. elongata leaves, especially for 1064, 1638, 2926 and 3386 cm(-1) bands, indicating the synthesis of carbohydrate and lipid compounds was a kind of mechanism under the toxic effects of nanonanoparticles. (C) 2013 Elsevier Ltd. All rights reserved.
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