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Quality improvement of sweet rice wine fermented with Rhizopus delemar on key aroma compounds content, phenolic composition, and antioxidant capacity compared to Rhizopus oryzae

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Abstract

The pure culture fermentation has led to less flavorful rice wine and relatively lower bioactive substance level compared to traditional mixed culture fermentation; however, a pure strain is easily controlled by industrialized producers. The purpose of the present research was to screen a species of Rhizopus for improving the flavor deficiency and antioxidant function of sweet rice wine. Seven rice wine samples fermented with isolated strains were analyzed for their total phenolics, total flavonoids, peptide and antioxidant activity using spectrophotometry, as well as ethanol, ethyl acetate, β-phenethyl alcohol, and volatile alcohol contents measured by headspace gas chromatography (HS-GC), the further principal component analysis determined Rhizopus delemar rice wine better on aroma and antioxidant capacity. A comparison of phenolics profile between R. delemar and R. oryzae rice wines was made based on the measurement data of ultrahigh-performance liquid chromatography coupled with Q-exactive orbitrap mass spectrometry (UHPLC-QE-MS) data. Thirty-two phenolics were identified in sweet rice wine. Overall, the results presented in this study showed that a strain of R. delemar is available for the improvement of flavor and antioxidant activity in sweet rice wine, which has the great potential to be applied to industrialized products.

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Availability of data and material

The datasets used or analyzed during the current study are available from the corresponding author on reasonable request.

Abbreviations

BLAST:

The basic local alignment search tool

CA:

Cluster analysis

FRAP:

Ferric reducing antioxidant power

GAE:

Gallic acid equivalents

GSH:

Glutathione

GSHEAC:

Glutathione equivalent antioxidant capacity

HS-GC:

Headspace-gas chromatography

ITS:

Internally transcribed spacer

MEGA:

Molecular evolutionary genetics analysis

PDA:

Potato dextrose agar (medium)

PCA:

Principal component analysis

RE:

Rutin equivalent

TCA:

Trichloroacetic acid

TEAC:

Trolox equivalent antioxidant capacity

TFC:

Total flavonoid content

TPC:

Total phenolic content

UHPLC-QE-MS:

Ultrahigh-performance liquid chromatography coupled with Q-exactive orbitrap mass spectrometer

YRR1:

Isolated strain from the starter of Sichuan province, China

YRR2:

Isolated strain from the starter of Hunan province, China

YRR3:

Isolated strain from the starter of Guangxi province, China

YRR4:

Isolated strain from the starter of Chongqing province, China

YRR5:

Isolated strain from the starter of Guangxi province, China

WJ01:

Rhizopus oryzae WJ01 (GenBank accession MT835118)

AQR:

Commercial Rhizopus oryzae, Angel Yeast Co., Ltd, China

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Acknowledgements

This study was supported by Hunan Provincial Science and Technology Department, China (Grant No. 2020SK2140) and the Technology Development Project of Jiangxi Lidu Liquor Industry Co. Ltd. (No. 2019430102003061 and No. 2020430102002535). The authors wish to acknowledge Professor Xiyun Deng, University of Hunan Normal University, for his help in providing language help. Thanks to Mr. Shengang Liu for providing information help.

Funding

This study was supported by Hunan Provincial Science and Technology Department, China (Grant No. 2020SK2140) and the Technology Development Project of Jiangxi Lidu Liquor Industry Co. Ltd. (No. 2019430102003061 and No. 2020430102002535).

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Authors and Affiliations

Authors

Contributions

Conceptualization, Y.Y. and T.Y.; Methodology, Y.Y.; Formal Analysis, Y.Y.; Investigation, Y.Y., N.Y. and S.X.; Resources, T.Y.; Data Curation, Y.Y.; Writing – Original Draft Preparation, Y.Y.; Writing – Review & Editing, H.Z. and T.Y.; Visualization, Y.Y. and N.Y.; Supervision, T.Y. and H.Z.

Corresponding author

Correspondence to Tao Yang.

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Yang, Y., Zhong, H., Yang, N. et al. Quality improvement of sweet rice wine fermented with Rhizopus delemar on key aroma compounds content, phenolic composition, and antioxidant capacity compared to Rhizopus oryzae. J Food Sci Technol 59, 2339–2350 (2022). https://doi.org/10.1007/s13197-021-05250-x

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