Abstract
BackgroundSodium nitroprusside (SNP) has been previously shown to extend the vase life of various cut flowers; however, its positive effect on extending vase life of carnations has not been well documented. Moreover, the role of SNP in the mechanisms underlying determination of vase life of cut carnations has also not been well addressed.ResultsSNP increased vase life of Tico Viola carnations along with their relative fresh weight (RFW). Among the treatments, the flowers treated with 10 mg L−1 SNP had the longest vase life and maximum relative fresh weight (RFW). This was achieved through significant suppression of ethylene production via downregulation of ethylene biosynthesis and petal senescence-related genes, and through an increase in the scavenging mechanism of reactive oxygen species (ROS) by antioxidant activity during flower vase life. In addition, the positive efficacy of SNP could also be confirmed using 1-aminocyclopropane-1-carboxylic acid (ACC) and different cultivars, resulting in similar trends for both experiments.ConclusionTaken together, these results suggest that SNP plays a crucial role in multiple modes of action that are associated with the longevity of cut carnation flowers.
Highlights
Sodium nitroprusside (SNP) has been previously shown to extend the vase life of various cut flowers; its positive effect on extending vase life of carnations has not been well documented
The total polyphenol and flavonoid content detected in 1-aminocyclopropane-1-arboxylic acid (ACC) was lower than that in controls, but sodium nitroprusside (SNP) addition enhanced this activity. These findings suggest that SNP has the ability to extend the Effect of SNP on vase life of different genotypes We designed experiments to confirm the role of this SNP concentration (10 mg L−1) in different carnation cultivars, i.e., Venus, Tico Tico, and Shino Lily
The data presented here provide experimental evidence of the close association between ACC and petal senescence in cut flowers; in addition, the results indicated a positive role of SNP against the ethylene precursor (ACC) in extending the vase life of cut carnation flowers
Summary
Sodium nitroprusside (SNP) has been previously shown to extend the vase life of various cut flowers; its positive effect on extending vase life of carnations has not been well documented. When used as a cut flower, carnation postharvest senescence occurs within a week for most cultivars, which is a major challenge in marketing of the cut flowers. 1-methylcyclopropene (1-MCP), an Recently, there has been great interest in the application of sodium nitroprusside (SNP), an NO donor, to extend the vase life of cut flowers; its positive effects for elongating the postharvest life have been demonstrated in various cut flowers such as gladiolus and rose [12,13,14]. Dwivedi et al [14] recently claimed that SNP can increase the postharvest life of gladiolus flowers by downregulating senescence-associated genes as well as by enhancing antioxidant activity. Liao et al [13] observed that SNP enhanced the postharvest life of cut roses by inhibiting 1-aminocyclopropane-1-carboxylate oxidase
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