Using Synchrotron-Based Approaches To Examine the Foliar Application of ZnSO 4 and ZnO Nanoparticles for Field-Grown Winter Wheat

作者：Teng Zhang, Hongda Sun, Zhiyuan Lv, Lili Cui, Hui Mao, Peter M. Kopittke · 发表于：Journal of Agricultural and Food Chemistry · 年份：2017 · DOI：10.1021/acs.jafc.7b04153 · 被引用次数：149 · 研究领域：Plant Micronutrient Interactions and Effects、Silicon Effects in Agriculture、Plant Stress Responses and Tolerance

The effects of foliar-applied ZnO nanoparticles (ZnO NPs) and ZnSO 4 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 ZnSO 4 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.