Interaction of γ-Fe2O3 nanoparticles with Citrus maxima leaves and the corresponding physiological effects via foliar application

• DOI: 10.1186/s12951-017-0286-1
• Publication Date: 2017-07-10T21:47:56Z
• Authors: Jing Hu; Huiyuan Guo; Junli Li; Yunqiang Wang; Lian Xiao; Baoshan Xing
• Keywords: Wax; 0301 basic medicine; 2. Zero hunger; Citrus; Research; Ferric Compounds; Nano-enabled fertilizer; Plant Leaves; γ-Fe2O3 nanoparticles; 03 medical and health sciences; Foliar spray; Gene Expression Regulation, Plant; Waxes; Medical technology; Nanoparticles; Gene expression; Lipid Peroxidation; R855-855.5; Fertilizers; TP248.13-248.65; Biotechnology

Nutrient-containing nanomaterials have been developed as fertilizers to foster plant growth and agricultural yield through root applications. However, if applied leaves, how these nanomaterials, e.g. γ-Fe2O3 nanoparticles (NPs), influence the health are largely unknown. This study is aimed assess effects of foliar-applied NPs their ionic counterparts on physiology Citrus maxima associated mechanisms. No significant changes chlorophyll content activity were observed upon exposure 20–100 mg/L Fe3+. In C. roots, no oxidative stress occurred under all Fe treatments. shoots, 20 50 did not induce while 100 did. Furthermore, there was a positive correlation between dosages Fe3+ iron accumulation in shoots. accumulated shoots translocated down roots. We down-regulation ferric-chelate reductase (FRO2) gene expression exposed The Fe2+ transporter, Nramp3, regulated well exposure. Although led higher wax content, genes with formation (WIN1) transport (ABCG12) downregulated or unchanged compared control. Our results showed that both via foliar spray had an inconsequential effect growth, but can reduce nutrient loss due strong adsorption ability. plants iron-replete status. Moreover, biosynthesis collaborative multigene controlled process. various NPs, chelate exhibited advantages fertilizer, laying foundation for future applications nutrient-containing agriculture horticulture.