Foliar application of green synthesized ZnO nanoparticles reduced Cd content in shoot of lettuce

被引：0
作者：
Timilsina A. [1 ]
Adhikari K. [1 ]
Chen H. [1 ]
机构：
[1] Department of Agriculture, University of Arkansas at Pine Bluff, 71601, AR
来源：
Chemosphere | 2023年 / 338卷
基金：
美国食品与农业研究所;
关键词：
Cadmium bioavailability; Cadmium uptake; Cadmium-zinc interaction; Nanoparticles green synthesis; ZnO nanoparticles;
D O I：
10.1016/j.chemosphere.2023.139589
中图分类号：
学科分类号：
摘要：
Though Zinc (Zn) supplementation can mitigate root-based Cadmium (Cd) uptake in plants, the impact of foliar-applied Zinc Oxide nanoparticles (ZnO NPs) on this process remains under-explored. This study investigates the influence of foliar-applied ZnO NPs on the growth of lettuce and its Cd uptake in Cd-contaminated soil in greenhouse setting. Green synthesized ZnO (G-ZnO) NPs (10 and 100 mg/L) using sweet potato leaf extracts were used, and compared with commercially available ZnO (C–ZnO) NPs (100 mg/L) for their efficacy. Scanning electron microscopy and Fourier-transform infrared spectroscopy were used for G-ZnO NPs characterization. Shoot dry weight, antioxidant activity, and chlorophyll content were all negatively affected by Cd but positively affected by ZnO NPs application. ZnO NPs application resulted in a notable reduction in lettuce Cd uptake, with the highest reduction (43%) observed at 100 mg/L G-ZnO NPs. In the lettuce shoot, Zn and Cd concentration showed a significant inverse correlation (R2 = 0.79–0.9, P < 0.05). This study offers insights into the impact of chemical and green synthesized ZnO NPs on enhancing crop growth under stress conditions, and their role in modulating Cd uptake in plants, indicating potential implications for sustainable agricultural practices. © 2023 Elsevier Ltd
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