Khedr Emad Hamdy, Al-Khayri Jameel Mohammed
Department of Pomology, Faculty of Agriculture, Cairo University, Giza 12613, Egypt.
Department of Agricultural Biotechnology, College of Agriculture and Food Sciences, King Faisal University, Al-Ahsa 31982, Saudi Arabia.
Plants (Basel). 2023 May 5;12(9):1887. doi: 10.3390/plants12091887.
Mango ( L.) is one of the most popular tropical fruits grown in Egypt and several other countries, making it a potential export commodity. Excessive deterioration after harvest requires various treatments to maintain fruit quality. We evaluated the treatments effects of melatonin (MT) as an anti-ethylene agent and tragacanth gum (TRG) as an edible coating individually and together (MT-TRG) before storing mangoes at 12 °C for 32 days under 85-90% relative humidity. Compared with control, all treatments were significantly effective in preserving fruit quality. Fruits treated with MT-TRG showed significantly lower decay values, respiration rates, ethylene production, and weight loss than untreated fruits. MT-TRG treatment significantly enhanced fruit quality, thereby maintaining fruit appearance, flesh color, firmness, total soluble solids and phenolic contents, and pectin methyl esterase, polyphenol oxidase, and peroxidase activities during the storage period. We propose 200 µM MT + 1% TRG as a safe postharvest treatment to reduce the deterioration of mangoes and maintain fruit quality.
芒果（杧果属）是埃及和其他几个国家种植的最受欢迎的热带水果之一，使其成为一种潜在的出口商品。收获后过度变质需要各种处理来保持果实品质。在将芒果于12℃、相对湿度85 - 90%的条件下储存32天之前，我们分别评估了褪黑素（MT）作为抗乙烯剂和黄芪胶（TRG）作为可食用涂层单独使用以及一起使用（MT - TRG）的处理效果。与对照相比，所有处理在保持果实品质方面均有显著效果。用MT - TRG处理的果实比未处理的果实表现出显著更低的腐烂值、呼吸速率、乙烯产量和重量损失。MT - TRG处理显著提高了果实品质，从而在储存期间保持了果实外观、果肉颜色、硬度、总可溶性固形物和酚类含量，以及果胶甲酯酶、多酚氧化酶和过氧化物酶的活性。我们建议200µM MT + 1% TRG作为一种安全的采后处理方法，以减少芒果的变质并保持果实品质。
