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چکیده
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Vascular blockage caused by mucilage deposits after cutting flower stems is one of the most important factors leading to reduced water uptake, increased post-harvest stress intensity, decreased quality, and vase life of cut Narcissus tazetta flowers. In the present study, the effect of temporary hot water treatments at temperatures of 21 (control), 35, 45, 55, and 65 °C for 5 minutes was investigated using a split-plot design in a completely randomized design with 3 repetitions at 0 (harvest time), 3, and 6 days post-harvest at a temperature of 21±1 flower and relative humidity of 65±5 %. The results showed that hot water treatments at 55 and then 65 °C effectively reduced petal wilting and increased vase life compared to other treatments. Additionally, flowers treated with these temperatures had higher water uptake and enzyme activities of catalase and peroxidase, and lower ion leakage, hydrogen peroxide, and malondialdehyde levels compared to other treatments. Possibly, the dissolution of mucilage compounds and prevention of vascular blockages by hot water treatments maintained water absorption by the flowers and improved their quality and vase life post-harvest. Therefore, based on the present results, the hot water treatment at 55 degrees Celsius is recommended as a practical solution for increasing the vase life of cut Narcissus tazetta flowers.
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