Effects of melatonin on blueberry fruit quality and cell wall metabolism during low temperature storage
文献类型： 外文期刊
作者： Qu, Guangfan 1 ; Ba, Liangjie 1 ; Wang, Rui 1 ; LI, Jiangkuo 2 ; Ma, Chao 1 ; Ji, Ning 1 ; Cao, Sen 1 ;
作者机构： 1.Guiyang Univ, Sch Food & Pharmaceut Engn, Guiyang, Peoples R China
2.Natl Engn & Technol Res Ctr Preservat Agr Prod, Tianjin Key Lab Postharvest Physiol & Storage Agr, Key Lab Storage Agr Prod, Tianjin, Peoples R China
关键词： blueberry fruit; melatonin; quality; cell wall metabolism
期刊名称：FOOD SCIENCE AND TECHNOLOGY （ 影响因子：2.602； 五年影响因子：2.968 ）
ISSN： 0101-2061
年卷期： 2022 年 42 卷
页码：
收录情况： SCI
摘要： Melatonin is known to influence various physiological processes, including plant ripening; however, the effect of melatonin on postharvest blueberry fruit softening is unknown. Herein, the effects of melatonin at different concentrations (100, 300, and 500 mu mol L-1) on the quality parameters, cell wall substances, cell-wall-degrading enzymes, and cell wall ultrastructure of blueberry fruits were investigated during low-temperature storage. Melatonin treatment was found to effectively delay the decline in fruit firmness, slow the loss of soluble solids and titratable acids, and decrease the respiration rate and decay rate of blueberry fruits. The blueberry fruits treated with 300 mu mol L-1 melatonin exhibited the best quality. Melatonin treatment promoted anthocyanin accumulation, delayed ascorbic acid degradation, maintained a low relative membrane permeability in pulp, inhibited increases in lipoxygenase (LOX) activity, and reduced membrane lipid peroxidation. Moreover, melatonin controlled the formation of soluble pectin by inhibiting the activities of pectin methylesterase (PME), polygalacturonase (PG), cellulase (Cx), and beta-glucosidase (beta-Glu) while maintaining high contents of protopectin and cellulose. These results indicate that melatonin can effectively improve blueberry fruit quality and antioxidant capacity as well as and delay fruit softening by inhibiting the degradation of cell wall substances.
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