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Effects of nano-TiO_2 on photosynthetic characteristics of Ulmus elongata seedlings

机译：纳米TiO_2对榆树幼苗光合特性的影响

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摘要

The physiological and ecological responses of Ulmus elongata to different concentrations of nano-anatase TiO_2 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 TiO_2 solution the net photosynthetic rate of U. elongata seedlings were lower, comparing with the control (CK) (no spraying). TiO_2 solution had no effect on the carbon isotope values (δ~(13)C), indicating the lower photosynthetic capacity was not caused by stomatal limitation. The nitrogen isotope values (δ~(15)N) decreased, but the foliar metal elements, such as Mg, K and Mn contents were not affected by nano-anatase TiO_2 which promoted the Cu uptake. Fourier transform infrared spectroscopy showed that the nano-anatase TiO_2 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.
机译：本研究研究了榆树对不同浓度的纳米锐钛型TiO_2溶液的生理和生态响应，发现叶面施用0.1％（T1），0.2％（T2）和0.4％（T3）纳米锐化酶TiO_2溶液与对照（CK）相比（无喷施），延长了U. longata幼苗的净光合速率。 TiO_2溶液对碳同位素值（δ〜（13）C）没有影响，表明较低的光合作用能力不是由气孔限制引起的。氮同位素值（δ〜（15）N）降低，但叶绿素Mg，K和Mn的含量不受促进铜吸收的纳米锐钛型TiO_2的影响。傅里叶变换红外光谱表明，纳米锐钛型TiO_2提高了长叶U蒲叶片的吸光度，尤其是在1064、1638、2926和3386 cm〜（-1）波段，表明碳水化合物和脂质化合物的合成是一种机理。在纳米粒子的毒性作用下。

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  • 来源
    《Environmental Pollution》 |2013年第5期|63-70|共8页
  • 作者

    Jianguo Gao; Gendi Xu; Huanhuan Qian; Peng Liu; Ping Zhao; Yong Hu;

  • 作者单位

    Laboratory of Botany, Zhejiang Normal University, Jinhua 321004, PR China ,Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, PR China;

    Laboratory of Botany, Zhejiang Normal University, Jinhua 321004, PR China;

    Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, PR China;

    Laboratory of Botany, Zhejiang Normal University, Jinhua 321004, PR China;

    Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, PR China;

    Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    ulmus elongata; photosynthetic characteristics; nano-titanium dioxide (TiO_2); stomatal limitation; fourier transform infrared spectroscopy;

    机译：榆树光合特性;纳米二氧化钛（TiO_2）;气孔限制傅立叶变换红外光谱;

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