Department of Environmental Sciences and Engineering, Government College University, Allama Iqbal Road, 38000, Faisalabad, Pakistan.
Department of Environmental Sciences and Engineering, Government College University, Allama Iqbal Road, 38000, Faisalabad, Pakistan.
Environ Pollut. 2018 Nov;242(Pt B):1518-1526. doi: 10.1016/j.envpol.2018.08.036. Epub 2018 Aug 17.
An experiment was performed to explore the interactive impacts of zinc oxide nanoparticles (ZnO NPs) and cadmium (Cd) on growth, yield, antioxidant enzymes, Cd and zinc (Zn) concentrations in wheat (Triticum aestivum). The ZnO NPs were applied both in Cd-contaminated soil and foliar spray (in separate studies) on wheat at different intervals and plants were harvested after physiological maturity. Results depicted that ZnO NPs enhanced the growth, photosynthesis, and grain yield, whereas Cd and Zn concentrations decreased and increased respectively in wheat shoots, roots and grains. The Cd concentrations in the grains were decreased by 30-77%, and 16-78% with foliar and soil application of NPs as compared to the control, respectively. The ZnO NPs reduced the electrolyte leakage while increased SOD and POD activities in leaves of wheat. It can be concluded that ZnO NPs (levels used in the study) could effectively reduce the toxicity and concentration of Cd in wheat whereas increase the Zn concentration in wheat. Thus, ZnO NPs might be helpful in decreasing Cd and increasing Zn biofortification in cereals which might be effective to reduce the hidden hunger in humans owing the deficiency of Zn in cereals.
进行了一项实验，以探索氧化锌纳米粒子 (ZnO NPs) 和镉 (Cd) 对小麦 (Triticum aestivum) 生长、产量、抗氧化酶、Cd 和锌 (Zn) 浓度的互作影响。在不同时间间隔内，将 ZnO NPs 分别应用于受 Cd 污染的土壤和叶面喷雾中，并在生理成熟后收获植物。结果表明，ZnO NPs 促进了小麦的生长、光合作用和籽粒产量，而小麦地上部、根系和籽粒中的 Cd 和 Zn 浓度则分别降低和增加。与对照相比，叶面和土壤施用 NPs 分别使籽粒中的 Cd 浓度降低了 30-77%和 16-78%。ZnO NPs 降低了小麦叶片的电解质渗漏，同时增加了 SOD 和 POD 活性。可以得出结论，ZnO NPs（研究中使用的水平）可以有效降低小麦中 Cd 的毒性和浓度，同时增加小麦中的 Zn 浓度。因此，ZnO NPs 可能有助于减少谷物中的 Cd 和增加 Zn 的生物强化作用，这可能有助于减少由于谷物中 Zn 缺乏而导致的人类隐性饥饿。
