Nanostructured hydroxyapatite-zinc complex as a novel foliar system to reduce cadmium accumulation in wheat grain: Performance and mechanism
文献类型： 外文期刊
作者： Shi, Gaoling 1 ; Yi, Chao 1 ; Zhou, Huimin 1 ; Chen, Yinglong 4 ; Fan, Guangping 1 ; Tong, Fei 1 ; Chen, Wei 1 ; Liu, Lizhu 1 ; Li, Jiangye 1 ; Gao, Yan 1 ; Zhou, Dongmei 6 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Key Lab Agroenvironm Downstream Yangtze River Plai, Minist Agr & Rural Affairs Peoples Republ China, Nanjing 210014, Peoples R China
2.Minstry Agr & Rural Affairs, Natl Agr Expt Stn Agr Environm, Luhe, Peoples R China
3.Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212013, Peoples R China
4.Univ Western Australia, UWA Sch Agr & Environm, Perth, WA 6009, Australia
5.Univ Western Australia, Inst Agr, Perth, WA 6009, Australia
6.Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Peoples R China
关键词： Cadmium; Wheat; Foliar zinc; Nanocarrier; Gene regulation; Sustainable production
期刊名称：ENVIRONMENTAL TECHNOLOGY & INNOVATION （ 影响因子：7.1； 五年影响因子：7.1 ）
ISSN： 2352-1864
年卷期： 2025 年 40 卷
页码：
收录情况： SCI
摘要： Foliar zinc (Zn) application offers a promising strategy for cadmium (Cd) mitigation and Zn biofortification in wheat, while the poor leaf adhesion of conventional Zn formulations limits their effectiveness. This study utilized hydroxyapatite nanoparticles (nHAP) as a nanocarrier and prepared the nHAP-Zn complex through simple reactions. The complex exhibited superior leaf adhesion compared to ZnSO4 solution. Foliar application of nHAP-Zn increased grain Zn concentration by 38.8 % in the low-Cd-accumulating wheat cultivar Ningmai-11 (NM11) and 31.6 % in the high-Cd-accumulating cultivar Zhengmai-10 (ZM10), surpassing the effects of ZnSO4. Notably, nHAP-Zn decreased grain Cd concentration by 31.5 % in NM11 and 32.9 % in ZM10. Mechanistically, nHAP-Zn suppressed Cd uptake by downregulating the expression of TaNramp5, TaIRT1, and TaZIP5 genes in the roots, and inhibited Cd translocation from node Ito the grain by reducing xylem-to-phloem Cd transfer-related gene expression (i.e., TaHMA2, TaZIP3, and TaZIP7 in NM11, and TaHMA2, TaLCT1, TaZIP5, and TaZIP7 in ZM10). Furthermore, nHAP-Zn application did not compromise plant growth characteristics such as plant biomass and height. These findings highlight nHAP-Zn as a highly efficient foliar fertilizer for enhancing Zn biofortification while mitigating Cd accumulation in wheat cultivated in Cd-contaminated regions. This study presents a novel approach to improving wheat safety and nutritional quality.
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