Abstract
Introduction: The procedure to synthesize silver nanoparticles (SNPs) from Prunus cerasoides leaf extract and their effect on vase life and flower quality of cut carnation were investigated.
 Methods: SNPs were bio-synthesized from Prunus cerasoides leaf extract and characterized by using UV-Vis technique, TEM, and SEM images. The postharvest responses of carnation cut flowers to the biosynthesis SNPs were evaluated through vase life, relative fresh weight, vase solution uptake, flower diameter of cut carnation.
 Results: SNPs were synthesized under optimum conditions, including using the extract of leaf heating at 60 oC in 30 min, 4 mM of silver nitrate, pH of 11, and 180 min of reaction time. SNPs exhibited antimicrobial activity and then alleviated the bacterial development in the preservative solution. All treatments with SNPs had improved the vase life and quality of cut carnation compared to the control. A vase solution containing 2% sucrose enhanced the carnation cut flowers.
 Conclusions: The preservative solution containing 25 ppm SNPs and 2% sucrose showed the best effect. SNPs could be used as a promising antibacterial agent applied in the preservative solution for cut carnation flowers.
Highlights
The procedure to synthesize silver nanoparticles (SNPs) from Prunus cerasoides leaf extract and their effect on vase life and flower quality of cut carnation were investigated
The formation of colloidal SNPs was monitored by measuring the UVVis spectrum that showed strong evidence of colloidal metal particle formation, and the productivity growth in the synthesis medium was indicated by the gradual increase in the absorbance values
The absorption intensity demonstrated that the heat treatments at 60oC in 30 min yielded a larger amount of SNPs
Summary
The procedure to synthesize silver nanoparticles (SNPs) from Prunus cerasoides leaf extract and their effect on vase life and flower quality of cut carnation were investigated. A vase solution containing 2% sucrose enhanced the carnation cut flowers. SNPs could be used as a promising antibacterial agent applied in the preservative solution for cut carnation flowers. Microbial contaminations at the stem end and in the vase solution associated with the xylem blockage of carnation, and abbreviated the vase life 5. SNPs have a high surface area and a high fraction of surface atoms as compared to the bulk silver They are stable and well dispersed in aqueous solutions. This study was designed to investigate the green synthesis of SNPs using Prunus cerasoides leaf extract and their potential in preserving cut carnation
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