水素改質雰囲気包装によるチンゲンサイの貯蔵品質向上：水分損失抑制と細胞壁完全性維持のメカニズム
Bok choy undergoes rapid postharvest deterioration, largely driven by water loss. This study examined how hydrogen-modified atmosphere packaging (H₂-MAP) at concentrations of 0.01%, 0.1%, and 1% H₂ affects shelf-life extension under 4°C and 85% relative humidity over 9 days. Endogenous H₂ production in bok choy declined progressively during storage. Among the tested concentrations, 0.1% H₂-MAP produced the most favorable outcomes: chlorophyll a/b, carotenoids, total phenols, flavonoids, and total soluble solids were elevated relative to controls, while weight loss and electrolyte leakage decreased by 31.77% and 50.19%, respectively. The combined water fraction increased and respiration rate fell. At the biochemical level, xyloglucan endotransglycosylase (XET) activity and related transcripts—associated with cell wall degradation—were suppressed, whereas peroxidase (POD) activity and lignin-synthesis genes were upregulated. These molecular changes corresponded with preserved cell wall structural integrity, indicating that 0.1% H₂-MAP maintains postharvest quality by simultaneously limiting water loss and reinforcing cell wall architecture.
At 0.1% H₂-MAP, xyloglucan endotransglycosylase (XET) activity is downregulated, reducing cell wall degradation, while peroxidase (POD) activity and lignin-synthesis gene expression are upregulated, collectively preserving cell wall integrity and limiting water loss and electrolyte leakage.
This is basic research at the cellular or molecular level. For human application, inhalation is the most promising delivery route, but inhalation carries explosion risk and concentration matters (empirical LFL of 10%; high-concentration devices are not recommended).
See also:
https://h2-papers.org/en/papers/41754355