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Effect of electron-beam generated X-ray irradiation on water status and microstructure of fresh Hericium erinaceus by LF NMR, MRI, SEM and TEM

文献类型： 外文期刊

作者： Zhong, Yuanyuan 1 ; Cui, Yuan 1 ; Yu, Jiangtao 2 ; Yan, Shengkun 3 ; Bai, Junqing 2 ; Xu, Huaide 1 ; Li, Mei 1 ;

作者机构： 1.Northwest A&F Univ, Coll Food Sci & Engn, Yangling 712100, Peoples R China

2.Hesheng Irradiat Technol Co Ltd, Yangling 712100, Peoples R China

3.Xinjiang Acad Agr Sci, Res Inst Agr Machinery, Urumqi 830000, Peoples R China

关键词： Hericium erinaceus; Electron-beam generated X-ray; Water status; Postharvest quality; LF NMR; Freshness

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： 2024 年 209 卷

页码：

收录情况： SCI

摘要： Water loss poses a threat to the life of postharvest mushrooms. Clarifying the variation of water status in mushrooms and seeking an effective approach to postpone the water loss is of utmost urgency. This study assessed the application of electron-beam generated X-ray (EBGX) irradiation as a novel physical technology to maintain the postharvest storage quality of fresh Hericium erinaceus. Furthermore, the monitoring of changes in water distribution and migration as well as the tissue structure were conducted on irradiated (1.0, 1.5, and 2.0 kGy) samples using low-field nuclear magnetic resonance, magnetic resonance imaging, scanning electron mi-croscopy, and transmission electron microscopy, respectively. Results indicated that the cell compartments of cytoplasm and vacuole constituted the predominant parts among the three water components in H. erinaceus matrix, whereas the water in the vacuole migrated to the cytoplasm after storage. Thereinto, the mushrooms irradiated with 1.0 kGy retarded water migration and contained more water components than those irradiated with 0, 1.5, and 2.0 kGy. Importantly, the dose of 1.0 kGy irradiation had a minimum weight loss of 2.19% and the best retention of color and texture after 9 d of storage. Additionally, low-dose irradiation with 1.0 kGy and 1.5 kGy remarkably improved the physical microstructure of H. erinaceus, while 2.0 kGy irradiation was prej-udicial to the tissue structure. Taken together, the dose of 1.0 kGy was the most beneficial in maintaining postharvest quality of H. erinaceus. These findings provide insights into the changes in water status of H. erinaceus and the effects of EBGX irradiation on postharvest quality and deepen our understanding of the underlying mechanism whereby EBGX improves the freshness of H. erinaceus.

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