Abstract
This study aimed to reveal the impact of sunlight and ventilation on microbiota structure and functional profile during traditional broad bean paste fermentation. Higher diversity of bacterial community and maximum fungal diversity was observed in darkness or airtight conditions, indicating that it was conducive to maintain a stable community structure in sunlight and ventilation environment. Through qPCR quantification analysis, we found that the biomass of dominant taxa occurred significant changes in airtight conditions, which indirectly impacted the growth of Pediococcus, Meyerozyma and Zygosaccharomyces genus and further verified based on correlation analysis and salt tolerance of culture-dependent analysis. According to PICRUSt function prediction, the metabolism of compounds with antioxidative properties in broad bean paste was regulated by sunlight exposure. Meanwhile, the interactions among dominant microbes were mediated by sunlight and ventilation as shown by co-cultivation analysis. This study revealed the importance of sunlight and ventilation in regulation of BBP community, meanwhile enhancing our cognition about traditional bean-based fermented foods from the perspective of microbial ecology.
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