Biosynthesized Silver Nanoparticles Used in Preservative Solutions forChrysanthemumcv. Puma

Abstract

The use of pulse solutions containing antimicrobials has been reported, but more research is necessary. To increase vase life and to study their effect on opening inflorescences, silver nanoparticles were used in vase solutions for cv. PumaChrysanthemumstems. The nanoparticles were synthesized biologically usingChenopodium ambrosioidesL. applied at concentrations of 0.01, 0.05, 0.1, 0.5, 1, and 5 mM and compared with a control. Treatments were replicated five times. The stems were cut to 50 cm and observed until the end of their vase life. Low concentrations of silver nanoparticles promoted inflorescence opening and leaf yellowing, while the control leaves remained green, but there was a lower degree of inflorescence opening. High concentrations of silver nanoparticles (0.5, 1, and 5 mM) caused senescence due to low water uptake through the stems. Statistical differences in inflorescence opening and diameter, bacterial growth (CFU mL−1) in vase solutions, fresh weight, water uptake, and vase life were found among treatments. Longer vase life and less weight loss were observed in the stems exposed to low concentrations of silver nanoparticles. Low concentrations of silver nanoparticles promoted inflorescence opening and increased vase life ofChrysanthemumcv. Puma.

Green Synthesis of Ag Nanoparticles Using Grape Stalk Waste Extract for the Modification of Screen-Printed Electrodes

“…SPR band values shifted from 447.5 to 459.0 nm with the addition of extract volume from 1 to 9 mL, indicating the effect of extract concentration in the mean diameter of Ag-NPs. López-Carrillo et al [ 31 ] reported, that in general, particle size can be controlled by changing the volume of the reducing agent.…”

Use of biogenic silver nanoparticles in enhancing shelf life of Morus alba L. at post harvest stage

“…Nanosilver at low concentration may act as an effective preservative which not only prevents microbial growth 24,25 , maintaining xylem integrity but also activates protective enzymological activities 26 . Implementation of NS as preservatives has been reported to extend the shelf life of Dianthus 27 , Chrysanthemum 28 , tulip 29 , Gerbera 30 . However most of the preservative aspects of SN and NS have been reported to extend shelf life of economically important flowering twigs, almost no report was obtained that describes their ability to preserve postharvest leaf samples.…”

Green Synthesis of Ag Nanoparticles Using Grape Stalk Waste Extract for the Modification of Screen-Printed Electrodes

“…It must be remarked that the absorbance of peak from solution at pH 6 was higher than that at pH 4. As peak intensity could be related to Ag-NPs concentration, the increase on peak intensity of solution at pH 6 compared to López-Carrillo et al [31], reported that in general, particle size can be controlled by changing the volume of the reducing agent. Peer-reviewed version available at Nanomaterials 2018, 8, 946; doi:10.3390/nano8110946…”