| Popis: |
The microbial communities and fragrant components of Taorong-typed were analyzed using high-throughput sequencing (HTS) and headspace-solid phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS). At the phylum and genus levels with abundance ≥0.01% as the threshold, 3 phyla including Mucoromycota, Ascomycota, Basidiomycota were found in both medium-and high-temperature Daqu, but the abundances differed. At the genus level, 15 and 13 genera were recognized. Rhizopus (72.40%) and Thermomyces (53.32%) accounted for the largest proportions in medium- and high-temperature Daqu respectively. The medium-temperature Daqu and high-temperature Daqu were found with 40 and 29 fragrant components respectively, and contained the highest proportions of pyrazines (53.12%) and acids (32.68%) respectively. Correlation analyses between microbes and fragrant components showed Aspergillus , Hyphopichia , Trichosporon and Alternaria were all highly and positively correlated with pyrazines, but the dominant fungal communities were highly correlated only with a few single acid compounds, but not with acid compounds on the whole. |
