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Effects of ginger on microbial succession and flavor formation during Zao Chili fermentation
Xuexue Fu1,2, Yingchun Mu1,2, Wei Su1,2
1College of Liquor and Food Engineering, Guizhou University, Guiyang, Guizhou 550025, China.
Abstract:
To address long fermentation cycles and unstable quality in Guizhou Zao Chili, ginger was introduced as a fermentation regulator, and a multi-omics approach was used to investigate microbial succession and flavor formation. Sequencing showed that ginger addition was associated with changes in the microbial community. At mid-fermentation, Kazachstania and Hanseniaspora dominated the SJ group (74.69% and 17.16%), whereas Pichia and Meyerozyma dominated CK. Nitrite content in SJ was 30.24% lower than that in CK on days 20 and 40 (P < 0.05). HS-SPME/GC-MS analysis showed that, on day 20, the total relative response of detected volatile compounds in SJ was 16.47-fold higher than that in CK; this difference may be partly related to ginger-derived terpenoids, while the ester proportion increased by 6.58% (P < 0.01). Correlation and KEGG analyses suggested that ginger may improve fermentation safety and aroma by influencing microbial succession and flavor-related metabolism.
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