Melatonin treatment delays the softening of blueberry fruit by modulating cuticular wax metabolism and reducing cell wall degradation

[Display omitted] •Melatonin (MT) application maintained cuticular wax rod-like structure.•MT changed the cuticular wax composition and delayed wax degradation.•MT delayed pectin and cellulose degradation by inhibiting cell wall degrading enzymes.•MT down-regulating transcriptional level of genes in...

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Published in:Food research international 2023-11, Vol.173, p.113357-113357, Article 113357
Main Authors: Liu, Ruiling, Fanzhen, Shang, Niu, Ben, Wu, Weijie, Han, Yanchao, Chen, Hangjun, Gao, Haiyan
Format: Article
Language:English
Subjects:
blueberries
Blueberry fruit
Cell wall metabolism
cell walls
cellulose
Cuticular wax
epicuticular wax
food research
fruits
gas chromatography-mass spectrometry
Melatonin
metabolism
pectinesterase
pectins
polygalacturonase
transcription (genetics)
Vaccinium
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Summary:[Display omitted] •Melatonin (MT) application maintained cuticular wax rod-like structure.•MT changed the cuticular wax composition and delayed wax degradation.•MT delayed pectin and cellulose degradation by inhibiting cell wall degrading enzymes.•MT down-regulating transcriptional level of genes involved in cell wall degrading. The effects of postharvest melatonin (MT) treatment on cuticular wax and cell wall metabolism in blueberry fruit (Vaccinium spp.) were evaluated. The results revealed that MT treatment maintained the cuticular wax rod-like structure and delayed wax degradation. The gas chromatography-mass spectrometry analysis results revealed that MT application changed the cuticular wax composition in blueberries, and 25 metabolic components were screened. The metabolic regulation of wax quality in blueberry fruit may therefore be influenced by MT. Additionally, MT slowed down pectin and cellulose degradation by reducing the activities of cell wall degrading enzymes like pectin methyl esterase polygalacturonase, β-galactosidase, and cellulose in the later stages of storage. It also downregulated the transcriptional expression of related genes like VcPE, VcPG, VcBG6, and VcGAL1. Thus, MT prevented softening and senescence by postponing the degradation of the cell wall in postharvest blueberry fruit.
ISSN:0963-9969
1873-7145
DOI:10.1016/j.foodres.2023.113357