The role of abiotic and biotic factors of aged brine in directing microbial assembly and volatile profiles of Paocai during fermentation
文献类型： 外文期刊
第一作者： Zhao, Nan
作者： Zhao, Nan;Huang, Yuli;Lai, Haimei;Wang, Yali;Mei, Yuan;Zeng, Xueqing;Yang, Menglu;Li, Huajia;Zhu, Yongqing;Ge, Lihong;Huang, Yuli;Ge, Lihong;Zhao, Jichun;Gan, Renyou;Gan, Renyou
作者机构：
关键词： Fermented vegetables; Aged brine; Abiotic factor; Biotic factor; Microbial community; Volatile compounds
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： 2024 年 57 卷
页码：
收录情况： SCI
摘要： Aged brine is a representative natural starter that evolves with stable abiotic and biotic conditions for reproducible quality of fermented vegetables. In this study, the role of aged brine in directing the quality formation of Paocai (a traditional fermented vegetable) was investigated by analyzing the contribution of abiotic and biotic factors to physicochemical properties, volatile compound profiles, microbial composition and function in Paocai. Results showed that the abiotic factors in aged brine promoted reducing sugar consumption and lactic acid accumulation by facilitating the growth of indigenous lactic acid bacteria (LAB) and yeasts. Also, the masking effect of abiotic factors on isothiocyanates and disulfide alleviated the pungent flavor of Paocai. The biotic factors introduced indigenous dominant LAB genera of Liquorilactobacillus, Levilactobacillus, Lactiplantibacillus, Secundilactobacillus, Pediococcus, Lentilactobacillus, Lacticaseibacillus, Lactobacillus and indigenous dominant yeast genera of Kazachstania and Brettanomyces into Paocai. LAB functioned in the production of acid and aldehyde, while yeasts contributed to the accumulation of esters and lactones. Both LAB and yeasts reduced the contents of pungent compounds in Paocai during fermentation. Analysis of microbial function revealed that the role of aged brine was related to the regulation of carbohydrate metabolism and carbohydrate-active enzymes of the microbial community. This study provided an understanding of the role of aged brine in shaping the quality of fermented vegetables.
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