Abstract The appearance, flavor, and taste are important criteria of fruit quality, which is affected by environmental conditions, orchard management, and postharvest storage. The current study was conducted to investigate the influence of the pre-harvest application of forchlorfenuron (CPPU) on the red-fleshed cv. ‘Fu Kwai Hong’ pitaya (Hylocereus polyrhizus sp.) fruit during storage at 5 °C. On the flowering day, 100 mg L−1 CPPU was sprayed on the bracts and water was used as the control. The significantly higher bract thickness (1.49 mm and 1.67 mm), shorter fruit length (88.6 mm and 99.4 mm), lower fruit shape index (0.91 and 0.95), and less cracking ratio (0% and 2.17%) were recorded on CPPU treated fruit in both winter and summer seasons, respectively. Moreover, CPPU resulted in more chlorophyll a, chlorophyll b, and total chlorophyll content in the bracts than in the control, which caused fresh-green color of the bracts when CPPU treated fruit was harvested compared to the control, and was significantly less degree of bract browning than the control fruit during storage. Additionally, CPPU treated fruit exhibited later incidence of chilling injury than the control fruit during 5 °C storage. On the other hand, CPPU treated fruit had more weight loss and a slight increase of respiration rate compared to the control during storage at 5 °C.

中文翻译：

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通过采前施用 CPPU 改善新鲜红肉火龙果（Hylocereus polyrhizus sp.）果实的采后贮藏

摘要 外观、风味、口感是果实品质的重要指标，受环境条件、果园管理、采后贮藏等影响。本研究旨在调查收获前施用氯苯脲 (CPPU) 对红肉品种的影响。'Fu Kwai Hong' 火龙果 (Hylocereus polyrhizus sp.) 果实在 5 °C 下储存。在开花当天，在苞片上喷洒100 mg L-1 CPPU，并以水作为对照。CPPU 处理记录到的苞片厚度显着更高（1.49 毫米和 1.67 毫米），果实长度更短（88.6 毫米和 99.4 毫米），果实形状指数更低（0.91 和 0.95），开裂率更低（0% 和 2.17%）分别在冬季和夏季的水果。此外，CPPU 导致更多的叶绿素 a、叶绿素 b、且总叶绿素含量高于对照，导致CPPU处理果实采收时的苞片颜色较对照鲜绿色，贮藏期间苞片褐变程度明显低于对照果实。此外，在 5°C 储存期间，CPPU 处理的水果比对照水果表现出更晚的冷害发生率。另一方面，在 5°C 下储存期间，与对照相比，CPPU 处理的水果重量减轻更多，呼吸速率略有增加。在 5°C 储存期间，CPPU 处理的水果比对照水果表现出更晚的冷害发生率。另一方面，在 5°C 下储存期间，与对照相比，CPPU 处理的水果重量减轻更多，呼吸速率略有增加。在 5°C 储存期间，CPPU 处理的水果比对照水果表现出更晚的冷害发生率。另一方面，在 5°C 下储存期间，与对照相比，CPPU 处理的水果重量减轻更多，呼吸速率略有增加。