Nanoparticle-Induced Phytosiderophore Production: A Biochemical Approach to Iron Uptake in Grasses

Nanoparticles, particularly Fe2O3 and ZnO, have emerged as effective tools for enhancing iron uptake in crops by stimulating phytosiderophore (PS) production, improving iron solubility, and facilitating plant growth in iron-deficient soils. This article reviews the mechanisms through which these nanoparticles interact with plant metabolic pathways, including the generation of reactive oxygen species (ROS) and the upregulation of genes such as NAS and NAAT, which are critical for PS biosynthesis. Case studies on wheat, maize, and rice highlight the significant improvements in biomass, chlorophyll content, and iron concentration resulting from nanoparticle treatments. While Fe2O3 and ZnO nanoparticles show great potential for mitigating iron deficiencies and reducing the need for traditional fertilizers, concerns about their environmental impact, including effects on soil microbiota and nutrient cycles, emphasize the need for controlled and sustainable applications. This article also proposes guidelines for the safe use of nanoparticles in agriculture, ensuring their long-term benefits while minimizing ecological risks.