Association between microbiome dynamics and aroma evolution in fermented Chinese white pears (Pyrus ×
Ziru Yan1, Fei Song2, Jiangli Zhao3
1College of Food Science and Technology, Hebei Agricultural University, Baoding, Hebei 071000, China.
Abstract:
The flavor of pear cider exhibits regional features, with insufficient and unstable aroma constituting key quality issues. The role of its characteristic aroma and the contribution of native microorganisms to regional distinctiveness remain under explored. This study compared the brewing characteristics of representative white pears, conducted an in-depth analysis of aroma compound evolution and their relationship with microbial communities throughout fermentation, and successfully screened strains with aroma-enhancing function. Results indicated that "Xuehua" possessed the optimal processing quality. Six characteristic fermentation aroma were identified, including 2,3-butanediol, hexanal, ethyl caprylate, etc. The core microbes gradually converged, including Saccharomyces cerevisiae, Hanseniaspora, Leuconostoc, etc. Alcohol and total acid correlated strongly with fungi, while reducing sugars correlated strongly with bacteria. Except for hexanal, the characteristic aroma showed positive correlations with F:OTU235. Ethyl caproate and ethyl caprylate correlated positively with B:OTU118. Saccharomyces cerevisiae (F:OTU235) and Lactobacillus plantarum (B:OTU118) were screened selectively and contributed to aroma accumulation.
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