Synthesis, Characterization and Effect of Biogenically Synthesised Nanoparticles on the Shelf Life of Tomato

This study explores the synthesis of metal nanoparticles from biological sources, highlighting the ecofriendly and cost-effective advantages of using plant extracts and microorganisms. Two primary synthesis methods were examined: the photogenic approach, which is straightforward but time-consuming and yields polydisperse nanoparticles, and the biological approach, which is more environmentally friendly and avoids harmful chemicals. Silver nanoparticles were synthesized by harvesting and centrifuging microbial cultures, then treating the supernatant with silver nitrate and incubating in the dark. The synthesis was indicated by a color change. Further the synthesized nanoparticle were caracterised by UV-viz spectra showed the surface plasmon vibrations at 430nm, DLS and Zeta potential (-23mV) indicates good stability. The impact of synthesized silver nanoparticles (AgNPs) on the shelf life of tomatoes was then assessed. Over a 20-day period, tomatoes coated with AgNPs demonstrated reduced fungal infections and spoilage compared to untreated controls. The control group showed significant spoilage and weight loss, while the AgNP-treated tomatoes maintained better quality and extended shelf life. This study demonstrates that AgNPs effectively enhance the preservation of tomatoes, offering a promising method for improving the longevity and quality of perishable produce.