Search Results (2)

The herbaceous peony (Paeonia lactiflora Pall.) flower is one of the most important ornamental plants in current international flower markets and is widely used for festive occasions because of its bright colors, large flowers, pleasant scent, and plump flower shape. However, the cut peony flowers have a relatively short postharvest life in vases compared to other flower species. The short vase life and susceptibility to gray mold disease caused by Botrytis cinerea significantly influence the commercial value of cut peonies. Here, we reviewed the main factors for postharvest quality reduction in cut peony flowers and the various postharvest treatments aiming for vase life extension and enhancing gray mold disease resistance in cut peonies. Chemical treatments, including ethylene inhibitors, antimicrobial agents, and other preservatives, have been assessed for their effectiveness in improving vase life. Moreover, physical treatments, such as temperature management, controlled atmosphere storage, and dry storage methods, were also discussed for their effectiveness in delaying flower senescence and reducing gray mold disease infection. The review also highlighted the importance of cultivar-specific responses to gray mold disease, ethylene, and water stress, which is important for the development of new effective and specific postharvest practices to improve the vase life of cut peonies. Full article

Peony is one of the most important ornamental plants in the international flower market, but has a relatively short vase life in water. This study tested the effects of 8-hydroxyquinoline citrate (8-HQC) and nanosilver (NS) in combination with sucrose, as well as two commercial preservatives, on the longevity and some physiological and biochemical aspects of senescence of cut flowers of 14 cultivars. Responses varied both by cultivar and treatment. The preservatives extended the vase life in only five cultivars; however, in nine cultivars, preservatives increased the flower diameter and improved the general flower appearance. Blockages in xylem vessels started to appear soon after harvest. Both NS and 8-HQC with sucrose prevented tylose formation, while bacterial blockages were reduced only by the NS solution. Reduction in stem blockages did not translate into better water balance or flower longevity. The highest carbohydrate accumulation in petals was observed in the NS solution. Preservatives mitigated the rise in free amino acids, including free proline. They did not prevent an increase in H₂O₂ content but flowers in preservatives generally had higher catalase activity than in the control. As solutions with NS produced comparable or even better results than 8-HQC, we recommend the latter as a component of a preservative for cut peony flowers. However, cultivar-specific responses indicate that postharvest treatments must be individually tailored to each cultivar. Full article