文献类型： 外文期刊

作者： Njie, Alagie ¹ ; Dong, Xiaoqing ¹ ; Liu, Qingguo ³ ; Lu, Chengyu ¹ ; Pan, Xuejun ¹ ; Zhang, Wen'e ¹ ;

作者机构： 1.Guizhou Univ, Coll Agr, Guiyang 550025, Peoples R China

2.Univ Gambia, Sch Agr & Environm Sci, Kanifing, Gambia

3.Guizhou Acad Agr Sci, Inst Subtrop Crops, Fenglindong Rd, Guiyang 562400, Peoples R China

关键词： Mango; Melatonin; Firmness; Softening; Cell wall; Metabolism

期刊名称：POSTHARVEST BIOLOGY AND TECHNOLOGY （ 影响因子：7.0； 五年影响因子：6.9 ）

ISSN： 0925-5214

年卷期： 2023 年 205 卷

页码：

收录情况： SCI

摘要： Mango fruit (Mangifera indica L, cv. 'Guiqi') was treated with melatonin (1 mM) to explore the changing mechanisms in fruit softening and to examine the effects of melatonin on the interaction between the cell wall and reactive oxygen metabolisms subjected to cold storage. The results depicted that compared to control, melatonin treatment (1) improved storage life by maintaining the higher ascorbic acid (AsA) and reduced glutathione (GSH) contents, as well as maintained higher insoluble pectin, hemicellulose, and cellulose contents, and lower soluble pectin content of 'Guiqi' mango fruit. (2) Delayed fruit softening by maintaining higher firmness and suppressing the activities of polygalacturonase (PG), pectin methyl esterase (PME), cellulase (Cx), and & beta;-glucosidase (& beta;-glu); and cell wall degrading genes (MiPG14, MiPME, MiCel, and Mi & beta;-glu). (3) Enhanced storage quality by inhibiting decay incidence, respiration rate, and weight loss rate; increased activity of glutathione reductase (GR) and inhibits reactive oxygen species (ROS) metabolites at cold storage. These results indicate that exogenous melatonin could delay mango fruit softening by maintaining cell wall metabolism, inhibiting ROS metabolites (O2.- and H2O2) accumulation via enhancement of non-enzymatic (AsA and GSH contents) and enzymatic (GR activity) antioxidants, and thus maintaining quality and improved storage life.