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Vibration-Induced Texture Deterioration in Kiwifruit: Molecular Mechanisms and Modulation by 1-MCP-Mediated Pectin Stabilization
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DOI：10.1021/acs.jafc.6c03082.png)
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Abstract
En 中文
Vibration stress during transportation represents a mechanical factor that accelerates texture deterioration. This study revealed the molecular basis underlying vibration-induced texture deterioration in kiwifruit and further evaluated 1-methylcyclopropene (1-MCP) as an intervention. The results showed vibration accelerated pectin solubilization and nanostructural disassembly, whereas 1-MCP treatment better preserved pectin integrity with higher chelate-soluble pectin and sodium-carbonate-soluble pectin levels under vibration stress. Transcript analysis indicated that vibration induced elevated expression of pectin-degrading and -modifying genes, including polygalacturonase (PG) (Actinidia28962), β-galactosidase (Actinidia15368), and pectin methylesterase (PME) (Actinidia13568), whereas 1-MCP treatment downregulated these genes. Molecular docking indicated favorable binding poses of demethylesterified GalA oligomers with PME and higher-degree of polymerization GalA oligomers with PG, providing auxiliary insight into vibration-related pectin de-esterification and depolymerization. Therefore, this study provides a multilevel molecular explanation for vibration-induced texture deterioration from the perspective of pectin composition and structure and proposes a feasible strategy to delay texture loss under vibration stress.
Keywords:
Carbohydrates
Cells
Genetics
Oscillation
Stress
kiwifruit
vibration stress
1-MCP
pectin fractions
cell wall metabolism
molecular docking
Journal
IF:
6.2
Papers:
4.5W
Citations:
15.3W
Organization
Cited Papers