Effect of Melatonin Treatment on Antioxidant Metabolism and Storage Quality of "Fengtang" Plum

文献类型： 外文期刊

第一作者： Zhang, Yun

作者： Zhang, Yun;Luo, Dengcan;Zhang, Qin;Lin, Xin;Peng, Junseng;Wan, Xuan;Huang, Shian;Dong, Xiaoqing;Ma, Yuhua

作者机构：

关键词： "Fengtang" plums; postharvest; melatonin; quality; antioxidant

期刊名称：INTERNATIONAL JOURNAL OF FRUIT SCIENCE （ 影响因子：2.5； 五年影响因子：2.9 ）

ISSN： 1553-8362

年卷期： 2025 年 25 卷 1 期

页码：

收录情况： SCI

摘要： "Fengtang" plum, renowned in Guizhou for its distinct flavor and significant economic worth, experiences accelerated fruit senescence due to postharvest respiration climacteric. Melatonin (MT), an emerging endogenous plant hormone, holds promise in enhancing the storability of fruit. This study illustrated the effects of exogenous MT on the storability and antioxidant capacity of ripe plum fruits. The results of this study indicated that fruit soaking in 250 mu molL-1 MT could inhibit respiration rate, delay fruit firmness and weight loss rate, improve total soluble solids (TSS), decrease titratable acid (TA) and increase TSS/TA, effectively delay fruit softening and maintain fruit quality. MT maintained the quality of plum fruit in terms of inhibition of the increase of malondialdehyde (MDA) content, maintenance the content of total phenol (TP) and flavonoid (TF) compounds and anthocyanins, and enhancement the activities of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) to reduce the oxidative damage of fruits. MT inhibited ROS metabolites (O2.- and H2O2) accumulation via enhancement of non-enzymatic antioxidants (ascorbic acid (AsA), glutathione (GSH), and oxidized glutathione (GSSG) contents) and enzymatic antioxidants (ascorbic acid peroxidase (APX), glutathione reductase (GR), monodehydroascorbic acid reductase (MDHAR) and dehydroascorbate reductase (DHAR) activities), and thus delaying quality deterioration and extending storage life. These findings demonstrated that MT treatment delayed senescence in "Fengtang" plums through enhanced antioxidant mechanisms, thereby maintaining postharvest quality.

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