Archives of Current Research International

Nanopriming has emerged as a seed-treatment strategy in which brief exposure to nanoscale materials is used to modify imbibition, redox signalling, reserve mobilisation, hormonal responses and early stress tolerance. The approach is increasingly described as eco-friendly when nanoparticles are produced by plant extracts, agricultural residues, biopolymers or other lower-hazard routes. That label, however, is often assigned from synthesis chemistry alone, while the environmental burden of precursor production, thermal processing, dose, persistence, residual release and field use remains weakly characterised. This critical narrative review evaluates the evidence linking nanopriming to seed quality enhancement and asks when the technology can reasonably be regarded as environmentally compatible. The literature was selected through live searches of multidisciplinary and agriculture-relevant scholarly sources, with emphasis on verified peer-reviewed studies, direct comparisons, mechanistic work and evidence extending beyond laboratory germination. Across material classes, the most reproducible benefits concern faster or more complete germination, improved seedling vigour and partial recovery of performance under salinity, drought or ageing. Mechanistic support is strongest for controlled changes in water uptake, reactive oxygen species signalling, hydrolytic enzyme activity, antioxidant capacity and ion homeostasis, although the direction and magnitude of these responses depend strongly on particle chemistry, dose, priming duration, seed lot and stress severity. Green-synthesised zinc, iron, selenium and silica systems, chitosan-stabilised particles and carbon-based nanomaterials show promising results, but direct evidence that they reduce life-cycle environmental impacts remains sparse. Field validation, residue tracing, soil and microbiome effects, storage stability, batch reproducibility and comparisons with ionic, bulk and conventional priming controls are major weaknesses. Eco-friendly nanopriming is therefore best treated as a design objective rather than an intrinsic property of nanoscale seed treatment. Progress requires dose-efficient formulations, transparent characterisation, multi-season field trials and environmental assessment that follows the material from synthesis to crop and soil.