Abstract
This study was conducted to evaluate the effect of three polyamines (PAs) on antioxidants capacity, free radical scavenging and vase life improvement of spray carnation cut flowers. Hence, the cut flowers were dipped in different concentrations (0, 1, 2 and 3 mmol) of putrescine (Put), spermidine (Spd) and spermine (Spm) for 24 h. After treatment, the cut flowers were placed in distilled water and kept at 20 °C ± 2 °C, 70-80 % RH. All concentrations of Put treatment improved the vase life of cut spray carnation flowers as compared to control. The highest positive influence on vase life (with 13 days) was related to 2 mmol Put treatments. Result showed that applying Put and Spm treatments at 1 or 2 mmol concentration significantly minimized the percentage of mass loss compared to the control. A significant inhibition of anthocyanin degradation was observed with Put 1 or 2 mmol and Spm 1 mmol Significantly higher activities of catalase and DPPH radical scavenging activity were observed in petals when cut carnations were treated with 1 mmol Put. It can be concluded that application of polyamines such as putrescine can play a key role to prevent or delay deterioration in cut flowers.
Highlights
Spray type of cut carnation flowers have become more popular (Hanks et al, 2015)
The Put at all tested concentrations improved the vase life of cut spray carnation flowers as compared with control (Distilled water)
The obtained results indicate that polyamines at 1 or 2 concentrations improved the vase life of cut spray carnation flowers respectively compared with the control
Summary
Spray type of cut carnation flowers have become more popular (Hanks et al, 2015). Many studies well documented the role of PAs as antisenescent agents in reduction of respiration rate, ethylene production and retard color changes and increase flowers vase life (Niklas et al 1998; Valero et al, 2002; Genk et al, 2009; Rani & Singh, 2014; Tiburcio e al., 2014). Treatment of carnation cut flowers with ethylene inhibitors significantly extended vase life and CAT, SOD and POD enzyme activity (Hunter et al, 2004; Karimi et al, 2012; Karimi et al, 2013). More studies suggested that treatment with PAs significantly improved fresh mass, uptake of vase solution, flower opening, vase life and more parameters of ornamental plants (Pandey et al, 2000; Rubinowska & Miachałek, 2009; Kandil et al, 2011; Mahgoub et al, 2011; Hosseini Farahi et al, 2013; Ataii et al, 2015)
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