Bio-Synthesized Silver Nanoparticles on the Post-Harvest Senescence and Ethylene Production of Dianthus caryophyllus

Abstract

harvest senescence significantly limits the shelf life and commercial value of ornamental crops, necessitating sustainable approaches to maintain quality during storage and transport. This study investigates the influence of bio-synthesized silver nanoparticles on post-harvest senescence and ethylene production in Dianthus caryophyllus. A series of controlled experiments were conducted using eco-friendly, plant-mediated synthesized silver nanoparticles applied at varying concentrations to cut flowers. The treatments were evaluated for their effects on vase life, ethylene emission, physiological parameters, and visual quality attributes. Results indicated that application of bio-synthesized silver nanoparticles effectively delayed senescence by reducing ethylene production and slowing metabolic degradation processes. Treated flowers exhibited extended vase life, improved water uptake, and better maintenance of cellular integrity compared to untreated controls. The nanoparticles likely acted by modulating ethylene biosynthesis pathways and inhibiting microbial proliferation at stem ends, thereby enhancing post-harvest longevity. Optimal concentrations provided significant benefits, whereas excessive levels showed marginal or inhibitory effects, emphasizing the importance of dosage regulation. While analytical methods were employed to quantify ethylene levels and physiological responses, the study primarily focused on improving post-harvest management and ornamental crop quality. The findings demonstrate that bio-synthesized silver nanoparticles can serve as an effective and sustainable tool for extending the shelf life of Dianthus caryophyllus. This research contributes to floriculture by providing practical strategies to reduce post-harvest losses, improve product quality, and support environmentally responsible production systems.