期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 66, 期 11, 页码 2572-2579出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.7b04153
关键词
ZnO nanoparticles; foliar; wheat; Zn biofortification; field experiment; X-ray absorption spectroscopy; X-ray fluorescence microscopy
资金
- National Natural Science Foundation of China [41571282]
- Fundamental Research Funds for the Central Universities [2452015047]
- Natural Key Technologies RD Program [2015BAD23B04]
- Special Fund for Ago-scientific Research in the Public Interest [201503124]
The effects of foliar-applied ZnO nanoparticles (ZnO NPs) and ZnSO4 on the winter wheat (Triticum aestivum L.) grain yield and grain quality were studied under field conditions, with the distribution and speciation of Zn within the grain examined using synchrotron-based X-ray fluorescence microscopy and X-ray absorption spectroscopy. Although neither of the two Zn compounds improved the grain yield or quality, both increased the grain Zn concentration (average increments were 5 and 10 mg/kg for ZnSO4 and ZnO NP treatments, respectively). Across all treatments, this Zn was mainly located within the aleurone layer and crease of the grain, although the application of ZnO NPs also slightly increased Zn within the endosperm. This Zn within the grain was found to be present as Zn phosphate, regardless of the form in which Zn was applied. These results indicate that the foliar application of ZnO NPs appears to be a promising approach for Zn biofortification, as required to improve human health.
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