Document Type : Original Article
Authors
1
PhD alumni, Department of horticulture, Faculty of agriculture, Islamic Azad University of Isfahan (Khorasgan) Branch,
2
Department of horticulture, Faculty of agriculture, water, food and functional foods, Islamic Azad University of Isfahan (Khorasgan) Branch, Isfahan, Iran
10.22091/ijpb.2026.16046.1009
Abstract
This study investigated the postharvest physiological and biochemical responses of three commercial hybrid tea rose cultivars ‘Jumilia’ (white-pink), ‘ID Plus’ (red), and ‘Penny Lane’ (yellow) during cold storage at 4 °C over a nine-day period. Key parameters, including relative water content (RWC), electrolyte leakage (EL), total protein concentration, pigment profiles (anthocyanins and carotenoids), and peroxidase (POD) activity, were evaluated. Results showed significant (p<0.01) cultivar-dependent variations and time-related declines in most physiological traits. RWC and total protein decreased progressively, while EL significantly increased, signaling membrane destabilization and advancing senescence. Pigment analysis revealed strong cultivar specificity; ‘ID Plus’ maintained the highest anthocyanin levels, whereas ‘Penny Lane’ exhibited the greatest initial carotenoid content, which underwent a marked reduction during storage. POD activity patterns differed significantly, with ‘Penny Lane’ showing higher initial activity followed by a sharp decline, reflecting diverse antioxidant capacities among cultivars. These findings underscore that while storage duration exacerbates physiological degradation, the inherent genetic background primarily governs pigment stability and enzymatic defense mechanisms. This research provides critical insights into cultivar-specific postharvest behavior, aiding in the selection of roses with enhanced longevity and visual quality.
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