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Articles by Atefe Ameri
Total Records ( 3 ) for Atefe Ameri
  Mohsen Kazemi and Atefe Ameri
  The aim of this study was to evaluate the efficacy of silver nanoparticles (SNP), Salicylic acid, Glutamine and essential oils as novel antimicrobial agents in extending the vase-life of carnation (Dianthus caryophyllus) flowers. Two separate sets of experiments were conducted in a completely randomized design. In the first trial were applied salicylic acid (1, 1.5 and 2 mM), glutamine (50, 100 and 150 mg L-1) and silver nanoparticles (5, 10 and 15 mg L-1) on carnation cut flowers. The second set included investigating the effect of adding three concentrations of 50, 100 and 150 mg L-1 of Lavender essential oil or Thyme essential oil, two concentrations of 12.5 or 17.5 mg L-1 silver nanoparticles and two concentrations of 2.5 or 5 mM salicylic acid into preservative solutions containing 200 mg L-1 of glutamine. In both experiments distilled water was used as a control. The results of these experiments indicated that both application methods increased vase-life of carnation. In the first trial, the results showed that all salicylic acid, glutamine and silver nanoparticles different concentrations prolonged carnation vase-life, while decreasing malondialdehyde (MDA) content, accumulation of bacteria in vase solution, ACC-oxidase activity and membrane permeability together with total delay of senescence and per oxidation of lipids. In the second trial, all essential oils prolonged carnation vase-life. Lavender essential oil or Thyme essential oil (150 mg L-1), salicylic acid (2.5 mM) and silver nanoparticles (17.5 mg L-1) showed the highest effect (increasing 8.5 days) in comparison to the control.
  Mohsen Kazemi and Atefe Ameri
  The objective of the study was to determine the effect of Nano-Silver (NS) and acetylsalicylic acid on extending gerbera (Gerbera jamesonii) vase-life. For this was used of four levels of acetylsalicylic acid (1, 1.5, 2, 2.5 mM) and five levels of NS (1, 2, 3, 4 and 5 mg L-1). The results of this experiment indicated NS and acetylsalicylic acid treatments inhibited the growth of microorganisms in vase solution and considerably extended the vase-life of cut flowers of gerbera also acetylsalicylic acid (2.5 mM) and NS (5 mg L-1 ) were the best treatments so that increased vase life of cut flowers in laboratory conditions and decreasing MDA (Malondialehyde) content and ACC-oxidase (1-aminocyclopropane carboxylic acid oxidase) activity. Results of this study suggest that application of NS and acetylsalicylic acid have potential for introducing as novel alternatives instead of common chemicals used in preservative solutions in gerbera flowers.
  Mohsen Kazemi and Atefe Ameri
  In this research were analyzed effects of different concentrations of 5-sulfosalicylic acid (5-SSA), essential oil of Thyme (Thymus vulgaris) (EOs) and silver nitrate (AgNO3) on extending carnation (Dianthus caryophyllus) vase-life. For this purpose trial were conducted using a factorial test based on completely randomized design with six replications. The treatments of this experiment consisted of 5-SSA (1, 2, 3,4 and 5 mM), essential oils Thymus vulgaris (50,100,150 and 200 mg L-1) and silver nitrate (AgNO3) (0, 1.5, 2, 2.5 and 3 mM). Evaluated traits consisted of flower longevity, ACC-oxidase activity (ACO), anthocyanin leakage, microbial population, SPAD value, water uptake, superoxide dismutase (SOD) activity, Assays of MDA content. Results of this experiments showed that the microbial population of vase solution which treated with essential oils Thymus vulgaris and 5-sulfosalicylic acid were lower than other treatments. ACC-oxidase activity, anthocyanin leakage and the vase life of cut flowers significantly affected by 5-sulfosalicylic acid treatment, in comparison with control so that this treatment had better effect than control. It is distinguished that silver nitrate treatment had the best effect on fresh weight (%), followed by 5-sulfosalicylic acid treatment, respectively.
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