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Deterioration of muscle quality caused by ammonia exposure in rainbow trout (Oncorhynchus mykiss)

文献类型： 外文期刊

作者： Wu, Yiwen 1 ; Zhao, Manman 1 ; Xia, Yuting 1 ; Sun, Weiqing 2 ; Xiong, Guangquan 1 ; Shi, Liu 1 ; Qiao, Yu 1 ; Wu, Wenjing 1 ; Ding, Anzi 1 ; Chen, Lang 1 ; Wang, Lan 1 ; Chen, Sheng 1 ;

作者机构： 1.Hubei Acad Agr Sci, Inst Agroprod Proc & Nucl Agr Technol, Key Lab Agr Prod Cold Chain Logist, Minist Agr & Rural Affairs, Wuhan 430064, Peoples R China

2.Yangtze Univ, Coll Life Sci, Jingzhou 434025, Peoples R China

3.Hubei Univ Technol, Hubei Prov Cooperat Innovat Ctr Ind Fermentat, Key Lab Fermentat Engn, Hubei Key Lab Ind Microbiol, Wuhan 430068, Peoples R China

关键词： Ammonia exposure; Rainbow trout fillets; Muscle quality; Free amino acid; Fatty acid

期刊名称：FOOD BIOSCIENCE （ 影响因子：5.2； 五年影响因子：5.4 ）

ISSN： 2212-4292

年卷期： 2023 年 53 卷

页码：

收录情况： SCI

摘要： In order to explore deterioration of muscle quality caused by ammonia exposure in rainbow trout (Oncorhynchus mykiss), and then preliminarily investigating the regulatory mechanism of muscle quality in O. mykiss after ammonia exposure based on the lipid metabolism, different concentrations of ammonia stress experiment were conducted, and the physicochemical properties of muscle, antioxidant system, products of energy and lipid metabolism were investigated at total ammonia concentration of 0 (control group), 10 mg/L (T1), 20 mg/L (T2), 30 mg/L (T3), 45 mg/L (T4) and 60 mg/L (T5). In comparison with the control group, the fillets after ammonia stress exhibited higher a* value, expressible moisture, essential amino acids (EAA), the bitter amino acid and mono-saturated fatty (MUFA), less the umami and sweet amino acids and polyunsaturated fatty acid (PUFA), worse flavor and taste. The lower ammonia exposure (lower than 30 mg/L) did not change the content of EPA and DHA while significant decreases were observed after higher ammonia exposure (higher than 30 mg/L). Meanwhile, the lower ammonia exposure activated the antioxidant system and higher ammonia exposure inactivated antioxidant enzymes to defend against reactive oxygen species (ROS). Moreover, the expression of d9D, FAS, LPL, PPARa, PPARy and SREBP were inhibited and the expression of CPT1 was promoted after ammonia stress, inhibiting lipid synthesis and promoting lipid oxidation. The results are important in estab-lishing the relationship among muscle quality, lipid metabolism and the environmental adaptability of rainbow trout (O. mykiss).

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