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The role of silver nano-particles and silver thiosulfate on the longevity of cut carnation (Dianthus caryophyllus) flowers.

Journal of environmental biology (2014-07-10)
Davood Hashemabadi
ABSTRACT

The purpose of this study was to evaluate the efficacy of silver nano-particles (SNP) and silver thiosulfate (STS) in extending the vase life of cut carnation (Dianthus caryophyllus L. cv. 'Tempo') flowers. Pulse treatments of SNP @ 0, 5, 10 and 15 mg l(-1) and STS @ 0, 0.1, 0.2 and 0.3 mM were administered to carnation flowers for 24 hr. The longest vase life (16.1 days) was observed in flowers treated with 15 mg l(-1) of SNP + 0.2 mM STS. The least chlorophyll was destroyed in flowers treated with 15 mg I(-1) of SNP + 0.3 mM STS. Our findings showed that the 15 mg l(-1) SNP treatment inhibited bacterial growth in the preservative solution. The control flowers bloomed faster than the treated flowers. The maximum peroxidase activity and the minimum lipid peroxidation were obtained in cut flowers that were treated with 15 mg l(-1) of SNP and 0.3 mM STS. Overall, results of the study revealed that SNP and STS treatment extended the longevity of cut carnation 'Tempo' flowers by reducing oxidative stress, improving anti-oxidant system, reducing bacterial populations and delaying flowering.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Silver, foil, thickness 1.0 mm, 99.99% trace metals basis
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Silver, shot, 1-3 mm, ≥99.99% trace metals basis
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Silver, foil, not light tested, 300x300mm, thickness 0.025mm, as rolled, 99.95+%
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Silver nanowires, diam. × L 115 nm × 20-50 μm, 0.5% (isopropyl alcohol suspension)
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Silver nanowires, diam. × L 60 nm × 10 μm, 0.5% (isopropyl alcohol suspension)
Silver, foil, not light tested, 50x50mm, thickness 0.002mm, 99.97%
Silver, foil, light tested, 50x50mm, thickness 0.0125mm, 99.95+%
Silver, foil, not light tested, 100x100mm, thickness 0.0025mm, 99.97%
Silver, foil, 1m coil, thickness 0.035mm, as rolled, 99.95+%
Silver, foil, 2m coil, thickness 0.025mm, as rolled, 99.95+%
Silver, foil, 25mm disks, thickness 0.25mm, as rolled, 99.95+%
Silver, foil, 50mm disks, thickness 0.05mm, as rolled, 99.95+%
Silver, foil, 50mm disks, thickness 0.125mm, annealed, 99.95+%
Silver, foil, 25mm disks, thickness 1.0mm, as rolled, 99.99+%
Silver, foil, 2m coil, thickness 0.035mm, as rolled, 99.95+%
Silver, foil, 1m coil, thickness 0.075mm, as rolled, 99.95+%
Silver, foil, 15mm disks, thickness 0.20mm, as rolled, 99.95+%
Silver, foil, 4mm disks, thickness 0.004mm, 99.97%
Silver, foil, 4mm disks, thickness 0.01mm, 99.95+%
Silver, foil, 4mm disks, thickness 0.007mm, 99.97%
Silver, foil, 1m coil, thickness 0.0125mm, coil width 9mm, 99.95+%
Silver, foil, 15mm disks, thickness 0.007mm, 99.97%
Silver, foil, 15mm disks, thickness 0.015mm, 99.97%
Silver, foil, 25mm disks, thickness 0.008mm, 99.95+%
Silver, foil, 25mm disks, thickness 0.009mm, 99.97%
Silver, foil, 15mm disks, thickness 0.025mm, as rolled, 99.95+%
Silver, foil, 25mm disks, thickness 0.05mm, as rolled, 99.95+%