Dual Bioconversion Strategy: Synergistic Germination and <i>Lactobacillus</i> Fermentation Engineering for a γ-Aminobutyric Acid-Enriched Beverage from Brown Rice
Growing demand for plant-based nutraceuticals drives the need for innovative bioprocessing strategies. This study developed an integrated approach combining germination and Lactobacillus-mediated fermentation to produce a γ-aminobutyric acid (GABA)-enriched functional beverage from brown rice. Syste...
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2025-08-01
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| Series: | Foods |
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| Online Access: | https://www.mdpi.com/2304-8158/14/15/2733 |
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| author | Di Yuan Shan Zhang Bin Hong Shan Shan Jingyi Zhang Dixin Sha Shiwei Gao Qing Liu Shuwen Lu Chuanying Ren |
| author_facet | Di Yuan Shan Zhang Bin Hong Shan Shan Jingyi Zhang Dixin Sha Shiwei Gao Qing Liu Shuwen Lu Chuanying Ren |
| author_sort | Di Yuan |
| collection | DOAJ |
| description | Growing demand for plant-based nutraceuticals drives the need for innovative bioprocessing strategies. This study developed an integrated approach combining germination and Lactobacillus-mediated fermentation to produce a γ-aminobutyric acid (GABA)-enriched functional beverage from brown rice. Systematic screening identified an optimal rice cultivar for germination. Sequential enzymatic liquefaction and saccharification were optimized to generate a suitable hydrolysate. Screening of 13 probiotic strains revealed that a 10-strain <i>Lactobacillus–Bifidobacterium</i> consortium maximized GABA synthesis (12.2 mg/100 g). Fermentation parameters were optimized to 0.25% monosodium glutamate, 4% inoculum, 10 μmol/L pyridoxine hydrochloride, 37 °C, and 24 h. The resulting beverage achieved significantly elevated GABA concentrations while exhibiting low fat (0.2 g/100 g), reduced caloric content (233.6 kJ/100 g), and high viable probiotic counts (2 × 10<sup>8</sup> CFU/g). This strategy demonstrates significant potential for the scalable production of multifunctional, plant-based nutraceuticals with targeted bioactive components. |
| format | Article |
| id | doaj-art-4bd08ae5c9cc4148b8f2078bfcc04bd3 |
| institution | Kabale University |
| issn | 2304-8158 |
| language | English |
| publishDate | 2025-08-01 |
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| series | Foods |
| spelling | doaj-art-4bd08ae5c9cc4148b8f2078bfcc04bd32025-08-20T04:00:50ZengMDPI AGFoods2304-81582025-08-011415273310.3390/foods14152733Dual Bioconversion Strategy: Synergistic Germination and <i>Lactobacillus</i> Fermentation Engineering for a γ-Aminobutyric Acid-Enriched Beverage from Brown RiceDi Yuan0Shan Zhang1Bin Hong2Shan Shan3Jingyi Zhang4Dixin Sha5Shiwei Gao6Qing Liu7Shuwen Lu8Chuanying Ren9Food Processing Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, ChinaFood Processing Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, ChinaFood Processing Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, ChinaFood Processing Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, ChinaFood Processing Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, ChinaFood Processing Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, ChinaSuihua Branch of Heilongjiang Academy Agricultural Sciences, Suihua 152001, ChinaSuihua Branch of Heilongjiang Academy Agricultural Sciences, Suihua 152001, ChinaFood Processing Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, ChinaFood Processing Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, ChinaGrowing demand for plant-based nutraceuticals drives the need for innovative bioprocessing strategies. This study developed an integrated approach combining germination and Lactobacillus-mediated fermentation to produce a γ-aminobutyric acid (GABA)-enriched functional beverage from brown rice. Systematic screening identified an optimal rice cultivar for germination. Sequential enzymatic liquefaction and saccharification were optimized to generate a suitable hydrolysate. Screening of 13 probiotic strains revealed that a 10-strain <i>Lactobacillus–Bifidobacterium</i> consortium maximized GABA synthesis (12.2 mg/100 g). Fermentation parameters were optimized to 0.25% monosodium glutamate, 4% inoculum, 10 μmol/L pyridoxine hydrochloride, 37 °C, and 24 h. The resulting beverage achieved significantly elevated GABA concentrations while exhibiting low fat (0.2 g/100 g), reduced caloric content (233.6 kJ/100 g), and high viable probiotic counts (2 × 10<sup>8</sup> CFU/g). This strategy demonstrates significant potential for the scalable production of multifunctional, plant-based nutraceuticals with targeted bioactive components.https://www.mdpi.com/2304-8158/14/15/2733γ-aminobutyric acid (GABA)germination<i>Lactobacillus</i> fermentationgerminated brown rice (GBR)beverage |
| spellingShingle | Di Yuan Shan Zhang Bin Hong Shan Shan Jingyi Zhang Dixin Sha Shiwei Gao Qing Liu Shuwen Lu Chuanying Ren Dual Bioconversion Strategy: Synergistic Germination and <i>Lactobacillus</i> Fermentation Engineering for a γ-Aminobutyric Acid-Enriched Beverage from Brown Rice Foods γ-aminobutyric acid (GABA) germination <i>Lactobacillus</i> fermentation germinated brown rice (GBR) beverage |
| title | Dual Bioconversion Strategy: Synergistic Germination and <i>Lactobacillus</i> Fermentation Engineering for a γ-Aminobutyric Acid-Enriched Beverage from Brown Rice |
| title_full | Dual Bioconversion Strategy: Synergistic Germination and <i>Lactobacillus</i> Fermentation Engineering for a γ-Aminobutyric Acid-Enriched Beverage from Brown Rice |
| title_fullStr | Dual Bioconversion Strategy: Synergistic Germination and <i>Lactobacillus</i> Fermentation Engineering for a γ-Aminobutyric Acid-Enriched Beverage from Brown Rice |
| title_full_unstemmed | Dual Bioconversion Strategy: Synergistic Germination and <i>Lactobacillus</i> Fermentation Engineering for a γ-Aminobutyric Acid-Enriched Beverage from Brown Rice |
| title_short | Dual Bioconversion Strategy: Synergistic Germination and <i>Lactobacillus</i> Fermentation Engineering for a γ-Aminobutyric Acid-Enriched Beverage from Brown Rice |
| title_sort | dual bioconversion strategy synergistic germination and i lactobacillus i fermentation engineering for a γ aminobutyric acid enriched beverage from brown rice |
| topic | γ-aminobutyric acid (GABA) germination <i>Lactobacillus</i> fermentation germinated brown rice (GBR) beverage |
| url | https://www.mdpi.com/2304-8158/14/15/2733 |
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