Protective effects of polyamines on regulation of senescence in spray carnation cut flowers (Dianthus caryophyllus’Spotlight’)

Abstract

<p>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.</p>

Endogenous plant metabolites influence on shelf-life extension of tuberose flowers

“…6). The results are in agreement with Karimi et al (2017) where flowers treated with putrescine retained the fresh gain weight and reduced anthocyanin degradation.…”

Developmentally controlled changes during Arabidopsis leaf development indicate causes for loss of stress tolerance with age

“…7 ; Supplementary Table S7 ). Importantly, the metabolomics data provide a possible explanation for why oxidative stress-related genes are up-regulated during Arabidopsis leaf development: The polyamines putrescine and spermidine accumulate in response to a range of abiotic stresses to mitigate cellular damage ( Liu et al , 2015 ; Zhang et al , 2015 ), and were shown to reduce ROS abundance and delay the senescence process ( Woo et al , 2013 ; Karimi et al , 2017 ; Chen et al , 2019 ). The amino acids alanine, β-alanine, proline, and glutamate decreased during leaf development and these amino acids and some derivatives thereof have been shown to provide protection against various environmental stresses ( Sharma and Dietz, 2006 ; Martinelli et al , 2007 ; Hayat et al , 2012 ; Majumdar et al , 2016 ; Batista-Silva et al , 2019 ; Parthasarathy et al , 2019 ).…”

Polyamines accentuate vase life by augmenting antioxidant system in cut spikes of Consolida ajacis (L.) Schur.

“…Moreover, decrease in membrane seepage due to polyamine application has also been found to be associated with flower longevity as reported in cut rose flowers (Ghorbani et al, 2018). Polyamine mediated increase in vase life has been also reported in Rosa hybrida, Nicotiana plumbaginifolia and Dianthus caryophyllus (Nisar et al, 2015;Vieira et al, 2017;Karimi et al, 2017). The floral diameter also registered an increase in polyamine treated spikes.…”

“…Polyamines are purported as effective anti-senescence chemicals with convincing role in regulation of senescence as observed in Rosa and Gerbera (Vieira et al, 2017;Ghorbani et al, 2018). Polyamines improve vase life by reducing ethylene output, respiratory rate and color fading of petals (Tiburcio et al, 2014;Karimi et al, 2017). Exogenous inclusion of polyamines mitigate postharvest senescence by improving sugar content and up regulating antioxidant responses as evident in Chrysanthemum and Lisianthus cut flowers (Kandil et al, 2011;Ataii et al, 2015).…”