Title: | Relationships between bacterial community and metabolites of sour meat at different temperature during the fermentation |
Author(s): | Lv J; Yang Z; Xu W; Li S; Liang H; Ji C; Yu C; Zhu B; Lin X; |
Address: | "National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China. Department of Agricultural and Biosystems Engineering, Iowa State University, IA 50011, USA. Electronic address: chenxuyu@iastate.edu. National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China. Electronic address: zhubeiwei@163.com. National Engineering Research Center of Seafood, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, PR China. Electronic address: yingchaer@163.com" |
DOI: | 10.1016/j.ijfoodmicro.2019.108286 |
ISSN/ISBN: | 1879-3460 (Electronic) 0168-1605 (Linking) |
Abstract: | "This study was designed to explore the temperature effects on bacterial communities and metabolites, as well as their relationships during the fermentation of sour meat, a traditional fermented meat product in the ethnic minority regions of China. Results showed that reduction of pH and increase of lactic acid and free amino acid contents occurred (p?ª+ª+0.05) as the fermentation temperature and time increased, and the tendency was more apparent at higher temperature. During the fermentation, Lactobacillus gradually replaced other genera, and higher the temperature, more rapid was the process. Both the number and amount of volatile organic compounds increased at higher temperatures. Hexanal, benzaldehyde, nonanal, (E,E)-2,4-decadienal, 1-octen-3-ol and octanal were identified as the key volatile organic compounds produced by Lactobacillus in sour meat as main contributors to odor as confirmed by variable importance in the projection analysis. Redundancy analysis and Pearson correlation showed positive correlation between Lactobacillus and desired product characteristics, such as higher content of lactic acid, free amino acids, volatile organic compounds, and lower pH and water activity values, which may represent a better quality and longer shelf life after fermentation at higher temperature. Therefore fermentation at 20?ª+ degrees C and 25?ª+ degrees C are proposed as optimum temperatures for sour meat production" |
Keywords: | Amino Acids/analysis China/ethnology *Fermentation Fermented Foods/*microbiology *Food Microbiology Lactic Acid/metabolism Lactobacillus/growth & development/metabolism Meat Products/*analysis/*microbiology Microbiota/genetics/*physiology Odorants/analysi; |
Notes: | "MedlineLv, Jing Yang, Zhaoxia Xu, Wenhuan Li, Shengjie Liang, Huipeng Ji, Chaofan Yu, Chenxu Zhu, Beiwei Lin, Xinping eng Netherlands 2019/08/11 Int J Food Microbiol. 2019 Oct 16; 307:108286. doi: 10.1016/j.ijfoodmicro.2019.108286. Epub 2019 Jul 31" |