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Changes in the autolysis level, muscle stability and myofibrillar protein properties of Antarctic krill (Euphausia superba) during refrigerated storage

文献类型： 外文期刊

作者： Zheng, Yao 1 ; Ping, Zeyu 1 ; Xu, Yang 1 ; Li, Xueying 1 ; Guo, Quanyou 1 ;

作者机构： 1.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Ocean & Polar Fisheries, Shanghai 200090, Peoples R China

3.Univ Shanghai Sci & Technol, Sch Hlth Sci & Engn, Shanghai 200093, Peoples R China

关键词： Antarctic krill (Euphausia superba); muscle autolysis; protein degradation; refrigerated storage

期刊名称：INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY （ 影响因子：3.612； 五年影响因子：3.575 ）

ISSN： 0950-5423

年卷期： 2022 年 57 卷 12 期

页码：

收录情况： SCI

摘要： The aim of the study was to investigate the autolysis phenomenon in Antarctic krill during the buffer storage under refrigeration (after harvesting and before processing), groups of whole krill (WK) and of tail (TL) were stored at 4 degrees C and evaluated at 0, 6, 24, 36 and 48 h. The changes observed in visual appearance, sensory evaluation and meat yield jointly proved that severe autolysis had occurred, and this was more pronounced in the WK group than in the TL group. Meanwhile, the hardness of WK and TL groups decreased by 51.2% and 23.3%, and the shear force also decreased significantly from 3.26 N to 1.77 N and 2.28 N, respectively. Combined with the disrupted muscle microstructure and the conversion of bound water to immobilised water, the muscle tissue was found to be less stable as affected by the autolysis. The properties and structure of myofibrillar protein were dramatically changed, as revealed by the increased myofibril fragmentation index, decreased sulfhydryl content, and fluorescence intensity. Therefore, Antarctic krill can be deemed susceptible to autolysis during the buffer storage, especially whole krill. The information gained in this study improves our understanding of the effect of autolysis on muscle stability and its protein basis in Antarctic krill.

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