期刊
POSTHARVEST BIOLOGY AND TECHNOLOGY
卷 173, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.postharvbio.2020.111365
关键词
Ultraviolet light C; High-oxygen modified atmosphere packaging; Fresh-cut carrots; Synergistic effects; Gene expressions
资金
- National Key R&D Program of China [2018YFD0401300]
- National Natural Science Foundation of China [31560467, 31660589, 31560006, 31860579]
- Special Fund for Guangxi Bagui Scholars [[2016]21]
- Central Guides Local Science and Technology Development Project of Guangxi [Gui Ke ZY1949014]
- Science and Technology Major Project of Guangxi [Gui Ke AA17204038, AA17204042]
- Guangxi Scientific Research and Technological Development Projects [Gui Ke AD19110141]
- Postdoctoral Foundation of Guangxi Academy of Agricultural Sciences [2018029]
- Foundation of Fundamental Research Project from Guangxi Academy of Agricultural Sciences [JZ202019, 2019Z10, 2018YT27, 2018YM04, 2017JZ10, 2016JZ11, 2015YT86]
The combination of UV-C irradiation and high-oxygen MAP had synergistic effects on maintaining physiological quality, delaying senescence, inhibiting microbial growth, alleviating lignification degree, and reducing surface whitening of fresh-cut carrots during storage.
The present study investigated influences of ultraviolet light C (UV-C; 2 kJ m(-2)) irradiation and high-oxygen modified atmosphere packaging (MAP; 80 % O-2, 10 % CO2 and 10 % N-2) on physiological quality, microbial growth and lignification metabolism of fresh-cut carrots. After 15-d cold storage, comparing with either treatment alone, the combination of UV-C irradiation and high-oxygen MAP (abbr. UV-C + MAP) more obviously inhibited firmness, weight loss, ascorbic acid, total carotenoid and gamma-aminobutyric acid declines, reduced respiration and ethylene production rates as well as delayed bacterial growth. UV-C + MAP more strongly restrained whiteness index, total phenolic, lignin and malondialdehyde increases. Furthermore, UV-C + MAP treatment more efficiently retarded lignin synthesis by suppressing phenolic metabolism-related enzyme (phenylalanine ammonialyase, PAL; polyphenoloxidase, PPO; peroxidase, POD) activities and their gene (DcPAL; DcPPO; DcPOD) expressions. Above results indicated that UV-C + MAP exhibited synergistic effects in retaining physiological quality, delayed senescence process, reducing microbial growth, alleviating lignification degree, and lessened surface whitening. Therefore, UV-C + MAP could maintain overall quality and extend shelf-life during storage of fresh-cut carrots.
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