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. 2023 Sep 26;12(19):3576. doi: 10.3390/foods12193576

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Correlation between microbial genera and volatile flavor compounds. VIP plot of the microbiota using O2PLS modeling during black rice wine fermentation of Q1 (a), Q2 (b) and Q3 (c) Xiaoqu (red, VIP > 1.0, p < 0.05); Correlation network of Q1 (d), Q2 (e) and Q3 (f) Xiaoqu were constructed using Spearman’s correlation coefficient (|r| > 0.6, p < 0.05) among the microbial community (20 top fungi and 50 top bacteria) and the 18 characteristic flavor substances (OAV ≥ 1: isoamyl acetate (et5), ethyl octanoate (et10), 2-octenal (ad5), ethyl decanoate (et17), 2-decenal (ad9), ethyl heptanoate (et8), ethyl butyrate (et3), and nonanal (ad6); 1 > OAV > 0.1: ethyl palmitate (et22), phenyl ethyl acetate (et13), phenyl ethanol (al11), limonene (hf1), ethyl acetate (et1), 4-ethyl guaiacol (bp3), isoamyl alcohol (al2), butyrolactone (et7), and ethyl cinnamate (et18)) in black rice wine.

Correlation between microbial genera and volatile flavor compounds. VIP plot of the microbiota using O2PLS modeling during black rice wine fermentation of Q1 (a), Q2 (b) and Q3 (c) Xiaoqu (red, VIP > 1.0, p < 0.05); Correlation network of Q1 (d), Q2 (e) and Q3 (f) Xiaoqu were constructed using Spearman’s correlation coefficient (|r| > 0.6, p < 0.05) among the microbial community (20 top fungi and 50 top bacteria) and the 18 characteristic flavor substances (OAV ≥ 1: isoamyl acetate (et5), ethyl octanoate (et10), 2-octenal (ad5), ethyl decanoate (et17), 2-decenal (ad9), ethyl heptanoate (et8), ethyl butyrate (et3), and nonanal (ad6); 1 > OAV > 0.1: ethyl palmitate (et22), phenyl ethyl acetate (et13), phenyl ethanol (al11), limonene (hf1), ethyl acetate (et1), 4-ethyl guaiacol (bp3), isoamyl alcohol (al2), butyrolactone (et7), and ethyl cinnamate (et18)) in black rice wine.