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Li A, Liu Y, Yang G, Du M, Song J, Kan J. Impact of salt content on Douchi metabolites: biogenic amines, non-volatile compounds and volatile compounds. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024. [PMID: 38738583 DOI: 10.1002/jsfa.13574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 02/27/2024] [Accepted: 05/02/2024] [Indexed: 05/14/2024]
Abstract
BACKGROUND The excessive salt intake associated with Douchi has become a topic of controversy. Addressing this concern and enhancing its market competitiveness necessitates the application of salt reduction fermentation in Douchi. Therefore, to promote the application of salt reduction fermentation in Douchi, a comprehensive study was undertaken aiming to investigate the differences in biogenic amines, volatile compounds and non-volatile compounds in Douchi with varying salt content. RESULTS The findings unequivocally demonstrate that salt hampers the formation of metabolites in Douchi. As the salt content increased, there was a significant decrease (P < 0.05) in the levels of total acid, amino-type nitrogen and free amino acids in Douchi. Notably, when the salt content exceeded 80 g kg-1, there was a substantial reduction (P < 0.05) in putrescine, lactic acid and malic acid levels. Similarly, when the salt content surpassed 40 g kg-1, β-phenethylamine and oxalic acid levels exhibited a significant decline (P < 0.05). Furthermore, the results of E-nose and principal component analysis based on headspace solid phase microextraction gas chromatography-mass spectrometry revealed notable discrepancies in the volatile compound content between Douchi samples with relatively low salt content (40 and 80 g kg-1) and those with relatively high salt content (120, 160 and 200 g kg-1) (P < 0.05). By employing partial least squares discriminant analysis, eight distinct volatile compounds, including o-xylene, benzaldehyde and 1-octen-one, were identified. These compounds exhibited higher concentrations in Douchi samples with relatively low salt content (40 and 80 g kg-1). The sensory results showed that Douchi samples with lower salt content exhibited higher scores in the soy sauce-like and Douchi aroma attributes. CONCLUSION In conclusion, this study significantly enhances our understanding of the impact of salt on metabolites in Douchi and provides invaluable insights for the development of salt reduction fermentation in this context. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Aijun Li
- College of Food Science, Southwest University, Chongqing, China
| | - Yuchen Liu
- College of Food Science, Southwest University, Chongqing, China
| | - Gang Yang
- College of Food Science, Southwest University, Chongqing, China
| | - Muying Du
- College of Food Science, Southwest University, Chongqing, China
- Chinese-Hungarian Cooperative Research Centre for Food Science, Chongqing, China
- Laboratory of Quality & Safety Risk Assessment for Agri-products on Storage and Preservation (Chongqing), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Chongqing, China
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing, China
| | - Jun Song
- Shu Xiang Douchi Food Research Institute limited company, Chongqing, China
| | - Jianquan Kan
- College of Food Science, Southwest University, Chongqing, China
- Chinese-Hungarian Cooperative Research Centre for Food Science, Chongqing, China
- Laboratory of Quality & Safety Risk Assessment for Agri-products on Storage and Preservation (Chongqing), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Chongqing, China
- Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing, China
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2
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Xie J, Wang Y, Zhong R, Yuan Z, Du J, Huang J. Quality evaluation of Sojae Semen Praeparatum by HPLC combined with HS-GC-MS. Heliyon 2023; 9:e18767. [PMID: 37593616 PMCID: PMC10432166 DOI: 10.1016/j.heliyon.2023.e18767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 05/29/2023] [Accepted: 07/27/2023] [Indexed: 08/19/2023] Open
Abstract
Sojae Semen Praeparatum is a popular fermented legume product in China, with a delicious flavour and health benefits. However, the quality control methods for Sojae Semen Praeparatum are now incomplete, and there are no standards for defining its degree of fermentation. In this study, we introduced colour, acid value, ethanol-soluble extractives and six flavonoid components' content to evaluate the quality of Sojae Semen Praeparatum comprehensively. Multiple linear regression was used to streamline the 11 evaluation indicators to 4 and confirm the evaluating feasibility of the four indicators. The degree of fermentation and odour of Sojae Semen Praeparatum were analyzed on headspace-gas chromatography-mass, and two types of odours, 'pungent' and 'unpleasant', could distinguish over-fermented Sojae Semen Praeparatum. Our research developed fermentation specifications and quality standards for Sojae Semen Praeparatum.
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Affiliation(s)
- Jiaqi Xie
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Yibo Wang
- China National Traditional Chinese Medicine Co., Ltd, China
| | - Rongrong Zhong
- China National Traditional Chinese Medicine Co., Ltd, China
| | - Zhenshuang Yuan
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 100029, China
| | - Jie Du
- China National Traditional Chinese Medicine Co., Ltd, China
| | - Jianmei Huang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 100029, China
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3
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Hou H, Zhou W, Guo L, Jia S, Zhang X, Wang L. Effects of characteristics of douchi during rapid fermentation and antioxidant activity using different starter cultures. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2023; 103:2459-2472. [PMID: 36588174 DOI: 10.1002/jsfa.12419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 09/14/2022] [Accepted: 01/02/2023] [Indexed: 06/17/2023]
Abstract
BACKGROUND As a traditional Chinese condiment, douchi has attracted attention in Asian and European countries because of its high nutrient content and unique flavors. Douchi is currently produced mostly by natural fermentation. The quality of douchi produced in this way is affected by microbial species, temperature, humidity, and season, so the physical and chemical properties of the product, the content of flavor substances, and its safety vary. In this study, four safe strains with high protease activity, screened previously, namely Bacillus velezensis, Bacillus amyloliquefaciens, Lichtheimia ramosa, and Lichtheimia corymbifera, were used as starter cultures for douchi fermentation. RESULTS After 35 days, the results showed that the pH, titratable acids, free amino-type nitrogen, amino acids, the total number of colonies, and neutral protease activity of all samples had reached an average level. Through gas chromatography-mass spectrometry (GC-MS), the content of key aroma substances aldehydes and esters was higher than in commercial douchi and the free amino acid content of douchi fermented by the four strains was three to five times that of commercial douchi. Douchi fermented by Bacillus amyloliquefaciens had more flavor substances and the highest 2, 2-diphenyl-1-(2, 4, 6-trinitrophenyl) hydrazyl (DPPH) free radical scavenging rates of 92.4%. Four samples yielded total phenolic content and soy isoflavones in the range of 0.98-1.93 g kg-1 and 0.58-0.89 g kg-1 , respectively. CONCLUSION These findings indicate that the use of a high-protease activity starter to produce douchi can improve the quality of douchi to a certain extent. The douchi obtained using Bacillus amyloliquefaciens not only has a good flavor but also has a high level of antioxidant activity. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Hongwei Hou
- College of Food Science And Engineering, Shanghai Ocean University, Shanghai, China
| | - Wanting Zhou
- College of Food Science And Engineering, Shanghai Ocean University, Shanghai, China
| | - Lidan Guo
- College of Food Science And Engineering, Shanghai Ocean University, Shanghai, China
| | - Shuang Jia
- College of Food Science And Engineering, Shanghai Ocean University, Shanghai, China
| | - Xiaoyan Zhang
- College of Food Science And Engineering, Shanghai Ocean University, Shanghai, China
| | - Liping Wang
- College of Food Science And Engineering, Shanghai Ocean University, Shanghai, China
- Engineering Research Center of Food Thermal-processing Technology, Shanghai Ocean University, Shanghai, China
- Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation (Shanghai), Ministry of Agriculture, Shanghai, China
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4
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Li J, Peng B, Huang L, Zhong B, Yu C, Hu X, Wang W, Tu Z. Association between flavors and microbial communities of traditional Aspergillus-Douchi produced by a typical industrial-scale factory. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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5
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Tian F, Woo SY, Lee SY, Park SB, Im JH, Chun HS. Mycotoxins in soybean-based foods fermented with filamentous fungi: Occurrence and preventive strategies. Compr Rev Food Sci Food Saf 2022; 21:5131-5152. [PMID: 36084140 DOI: 10.1111/1541-4337.13032] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 07/31/2022] [Accepted: 08/05/2022] [Indexed: 01/28/2023]
Abstract
Fermented soybean products are widely consumed worldwide, and their popularity is increasing. Filamentous fungi, such as Actinomucor, Aspergillus, Monascus, Mucor, Penicillium, Rhizopus, and Zymomonas, play critical roles in the fermentation processes of many soybean foods. However, besides producing essential enzymes for food fermentation, filamentous fungi can release undesirable or even toxic metabolites into the food. Mycotoxins are toxic secondary metabolites produced by certain filamentous fungi and may be detected during the food production process. Without effective prevention strategies, mycotoxin contamination in fermented soybean products poses a risk to human health. This review focused on the changes in mycotoxigenic fungal abundance and mycotoxin contamination at different stages during the production of soybean-based fermented foods, as well as effective strategies for preventing mycotoxin contamination in such products. Data from relevant studies demonstrated a tendency of change in the genera of mycotoxigenic fungi and types of mycotoxins (aflatoxins, alternariol, alternariol monomethyl ether, deoxynivalenol, fumonisins, ochratoxin A, rhizoxins, T-2 toxin, and zearalenone) present in the raw materials and the middle and final products. The applicability of traditional chemical and physical mitigation strategies and novel eco-friendly biocontrol approaches to prevent mycotoxin contamination in soybean-based fermented foods were discussed. The present review highlights the risks of mycotoxin contamination during the production of fermented soybean products and recommends promising strategies for eliminating mycotoxin contamination risk in soybean-based fermented foods.
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Affiliation(s)
- Fei Tian
- Food Toxicology Laboratory, School of Food Science and Technology, Chung-Ang University, Anseong, Republic of Korea
| | - So Young Woo
- Food Toxicology Laboratory, School of Food Science and Technology, Chung-Ang University, Anseong, Republic of Korea
| | - Sang Yoo Lee
- Food Toxicology Laboratory, School of Food Science and Technology, Chung-Ang University, Anseong, Republic of Korea
| | - Su Been Park
- Food Toxicology Laboratory, School of Food Science and Technology, Chung-Ang University, Anseong, Republic of Korea
| | - Ju Hee Im
- Food Toxicology Laboratory, School of Food Science and Technology, Chung-Ang University, Anseong, Republic of Korea
| | - Hyang Sook Chun
- Food Toxicology Laboratory, School of Food Science and Technology, Chung-Ang University, Anseong, Republic of Korea
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6
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Qiao Y, Zhang K, Zhang Z, Zhang C, Sun Y, Feng Z. Fermented soybean foods: A review of their functional components, mechanism of action and factors influencing their health benefits. Food Res Int 2022; 158:111575. [PMID: 35840260 DOI: 10.1016/j.foodres.2022.111575] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 06/21/2022] [Accepted: 06/23/2022] [Indexed: 11/27/2022]
Abstract
After thousands of years of evolution and development, traditional fermented soybean foods, with their unique charm, have gained a stable place in the global market. With the explosive development of modern biological technologies, some traditional fermented soybean foods that possess health-promoting benefits are gradually appearing. Physiologically active substances in fermented soybean foods have received extensive attention in recent decades. This review addresses the potential health benefits of several representative fermented soybean foods, as well as the action mechanism and influencing factors of their functional components. Phenolic compounds, low-molecular-weight peptides, melanoidins, furanones and 3-hydroxyanthranilic acid are the antioxidative components predominantly found in fermented soybean foods. Angiotensin I-converting enzyme inhibitory peptides and γ-aminobutyric acid isolated from fermented soy foods provide potential selectivity for hypertension therapy. The potential anti-inflammatory bioactive components in fermented soybean foods include γ-linolenic acid, butyric acid, soy sauce polysaccharides, 2S albumin and isoflavone glycones. Deoxynojirimycin, genistein, and betaine possess high activity against α-glucosidase. Additionally, fermented soybean foods contain neuroprotective constituents, including indole alkaloids, nattokinase, arbutin, and isoflavone vitamin B12. The anticancer activities of fermented soybean foods are associated with surfactin, isolavone, furanones, trypsin inhibitors, and 3-hydroxyanthranilic acid. Nattokinase is highly correlated with antioxidant activity. And a high level of menaquinones-7 is linked to protection against neurodegenerative diseases. Sufficiently recognizing and exploiting the health benefits and functional components of traditional fermented soybean foods could provide a new strategy in the development of the food fermentation industry.
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Affiliation(s)
- Yali Qiao
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, No.600, Changjiang Road, Harbin 150030, China
| | - Kenan Zhang
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, No.600, Changjiang Road, Harbin 150030, China
| | - Zongcai Zhang
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, No.600, Changjiang Road, Harbin 150030, China
| | - Chao Zhang
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, No.600, Changjiang Road, Harbin 150030, China
| | - Yan Sun
- Heilongjiang Tobacco Industry Co., Ltd. Harbin Cigarette Factory, Harbin 150027, China
| | - Zhen Feng
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, No.600, Changjiang Road, Harbin 150030, China; Spice and Beverage Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wanning 571533, China.
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7
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Dynamic analysis of physicochemical characteristics and microbial communities of Aspergillus-type douchi during fermentation. Food Res Int 2022; 153:110932. [DOI: 10.1016/j.foodres.2021.110932] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 12/19/2021] [Accepted: 12/28/2021] [Indexed: 11/20/2022]
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8
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Chen Y, Li P, He W, Liao L, Xia B, Jiang L, Liu Y. Analysis of microbial community and the characterization of Aspergillus flavus in Liuyang Douchi during fermentation. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112567] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Tamang JP, Kharnaior P, Pariyar P, Thapa N, Lar N, Win KS, Mar A, Nyo N. Shotgun sequence-based metataxonomic and predictive functional profiles of Pe poke, a naturally fermented soybean food of Myanmar. PLoS One 2021; 16:e0260777. [PMID: 34919575 PMCID: PMC8682898 DOI: 10.1371/journal.pone.0260777] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 11/09/2021] [Indexed: 11/19/2022] Open
Abstract
Pe poke is a naturally fermented sticky soybean food of Myanmar. The present study was aimed to profile the whole microbial community structure and their predictive gene functionality of pe poke samples prepared in different fermentation periods viz. 3 day (3ds), 4 days (4ds), 5 days (5ds) and sun-dried sample (Sds). The pH of samples was 7.6 to 8.7, microbial load was 2.1-3.9 x 108 cfu/g with dynamic viscosity of 4.0±1.0 to 8.0±1.0cP. Metataxonomic profile of pe poke samples showed different domains viz. bacteria (99.08%), viruses (0.65%), eukaryota (0.08%), archaea (0.03%) and unclassified sequences (0.16%). Firmicutes (63.78%) was the most abundant phylum followed by Proteobacteria (29.54%) and Bacteroidetes (5.44%). Bacillus thermoamylovorans was significantly abundant in 3ds and 4ds (p<0.05); Ignatzschineria larvae was significantly abundant in 5ds (p<0.05), whereas, Bacillus subtilis was significantly abundant in Sds (p <0.05). A total of 172 species of Bacillus was detected. In minor abundance, the existence of bacteriophages, archaea, and eukaryotes were also detected. Alpha diversity analysis showed the highest Simpson's diversity index in Sds comparable to other samples. Similarly, a non-parametric Shannon's diversity index was also highest in Sds. Good's coverage of 0.99 was observed in all samples. Beta diversity analysis using PCoA showed no significant clustering. Several species were shared between samples and many species were unique to each sample. In KEGG database, a total number of 33 super-pathways and 173 metabolic sub-pathways were annotated from the metagenomic Open Reading Frames. Predictive functional features of pe poke metagenome revealed the genes for the synthesis and metabolism of wide range of bioactive compounds including various essential amino acids, different vitamins, and enzymes. Spearman's correlation was inferred between the abundant species and functional features.
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Affiliation(s)
- Jyoti Prakash Tamang
- Department of Microbiology, DAICENTER (DBT-AIST International Centre for Translational and Environmental Research) and Bioinformatics Centre, School of Life Sciences, Sikkim University, Gangtok, Sikkim, India
| | - Pynhunlang Kharnaior
- Department of Microbiology, DAICENTER (DBT-AIST International Centre for Translational and Environmental Research) and Bioinformatics Centre, School of Life Sciences, Sikkim University, Gangtok, Sikkim, India
| | - Priyambada Pariyar
- Department of Microbiology, DAICENTER (DBT-AIST International Centre for Translational and Environmental Research) and Bioinformatics Centre, School of Life Sciences, Sikkim University, Gangtok, Sikkim, India
| | - Namrata Thapa
- Department of Zoology, Biotech Hub, Nar Bahadur Bhandari Degree College, Sikkim University, Tadong, Sikkim, India
| | - Ni Lar
- Department of Industrial Chemistry, University of Mandalay, Mandalay, Myanmar
| | - Khin Si Win
- Department of Industrial Chemistry, University of Mandalay, Mandalay, Myanmar
| | - Ae Mar
- Department of Industrial Chemistry, University of Mandalay, Mandalay, Myanmar
| | - Nyo Nyo
- Department of Geography, University of Mandalay, Mandalay, Myanmar
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10
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Wang Y, Xiang F, Zhang Z, Hou Q, Guo Z. High-throughput sequencing-based analysis of fungal diversity and taste quality evaluation of Douchi, a traditional fermented food. Food Sci Nutr 2020; 8:6612-6620. [PMID: 33312545 PMCID: PMC7723193 DOI: 10.1002/fsn3.1953] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/02/2020] [Accepted: 10/05/2020] [Indexed: 11/08/2022] Open
Abstract
Douchi, a popular traditional fermented soybean product, is mainly made by natural fermentation. However, its taste quality is affected by specific fungal communities which vary greatly according to fermentation conditions and production technologies used in different regions. Therefore, the taste quality of Douchi samples from different regions was digitally evaluated using electronic tongue technology. In addition, the fungal community structures and its association of them were also identified using high-throughput sequencing technology. Results showed that there were obvious differences in the taste quality of samples from different regions, while the tastes of different types of samples from the same region were similar. Sourness, umami, richness, and saltiness were the main reasons for regional differences in taste. Similarly, the results of high-throughput sequencing indicated that samples from different regions displayed important differences in dominant fungal genus, among which Debaryomyces, Fusarium, Pichia, Aspergillus, and Saccharomyces were the main dominant fungi. Debaryomyces and Trichosporon were conducive to the formation of taste qualities of Douchi, while Cladosporium and Candida have a negative impact on the taste quality of Douchi var correlation analysis. This study indicated the effects of dominant fungi on the formation of Douchi taste quality, allowing a deeper understanding of the role of microbial species in generating fermented soybean products in China. Our work provides theoretical support to guide the improvement of the industrial production process of Douchi.
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Affiliation(s)
- Yurong Wang
- Hubei Provincial Engineering and Technology Research Center for Food IngredientsHubei University of Arts and ScienceXiangyangChina
| | - Fanshu Xiang
- Hubei Provincial Engineering and Technology Research Center for Food IngredientsHubei University of Arts and ScienceXiangyangChina
| | - Zhendong Zhang
- Hubei Provincial Engineering and Technology Research Center for Food IngredientsHubei University of Arts and ScienceXiangyangChina
| | - Qiangchuan Hou
- Hubei Provincial Engineering and Technology Research Center for Food IngredientsHubei University of Arts and ScienceXiangyangChina
| | - Zhuang Guo
- Hubei Provincial Engineering and Technology Research Center for Food IngredientsHubei University of Arts and ScienceXiangyangChina
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11
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LIU XF, LIU CJ, ZENG XQ, ZHANG HY, LUO YY, LI XR. Metagenomic and metatranscriptomic analysis of the microbial community structure and metabolic potential of fermented soybean in Yunnan Province. FOOD SCIENCE AND TECHNOLOGY 2020. [DOI: 10.1590/fst.01718] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Xiao-Feng LIU
- Kunming University of Science and Technology, China; Chinese Academy of Agricultural Sciences, China
| | | | - Xue-Qin ZENG
- Kunming University of Science and Technology, China
| | | | - Yi-Yong LUO
- Kunming University of Science and Technology, China
| | - Xiao-Ran LI
- Kunming University of Science and Technology, China
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12
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Xing Q, Dekker S, Kyriakopoulou K, Boom RM, Smid EJ, Schutyser MA. Enhanced nutritional value of chickpea protein concentrate by dry separation and solid state fermentation. INNOV FOOD SCI EMERG 2020. [DOI: 10.1016/j.ifset.2019.102269] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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13
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Yang H, Yang L, Zhang J, Li H, Tu Z, Wang X. Exploring functional core bacteria in fermentation of a traditional Chinese food, Aspergillus-type douchi. PLoS One 2019; 14:e0226965. [PMID: 31887171 PMCID: PMC6936781 DOI: 10.1371/journal.pone.0226965] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 12/09/2019] [Indexed: 12/03/2022] Open
Abstract
Douchi is a type of traditional Chinese flavoring food that has been used for thousands of years and is produced by multispecies solid-state fermentation. However, the correlation between the flavor, the microbiota, and the functional core microbiota in Aspergillus-type douchi fermentation remains unclear. In this study, Illumina MiSeq sequencing and chromatography were used to investigate the bacterial community and flavor components in Aspergillus-type douchi fermentation. The dominant phyla were Firmicutes, Proteobacteria, and Actinobacteria, and the dominant genera were Weissella, Bacillus, Anaerosalibacter, Lactobacillus, Staphylococcus, and Enterococcus. A total of 58 flavor components were detected during fermentation, including two alcohols, 14 esters, five pyrazines, three alkanes, four aldehydes, three phenols, six acids, and five other compounds. Bidirectional orthogonal partial least square modeling showed that Corynebacterium_1, Lactococcus, Atopostipes, Peptostreptococcus, norank_o__AKYG1722, Truepera, Gulosibacter, norank_f__Actinomycetaceae, and unclassified_f__Rhodobacteraceae are the functional core microbiota responsible for the formation of the flavor components during douchi fermentation. This is the first study to investigate the functional core microbiota in douchi fermentation using Illumina MiSeq sequencing and chromatographic techniques. Our findings extend our understanding of the relationships between flavor, the microbiota, and the functional core microbiota during Aspergillus-type douchi fermentation.
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Affiliation(s)
- Huilin Yang
- Key Lab of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, China
| | - Lin Yang
- Key Lab of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, China
| | - Ju Zhang
- Key Lab of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, China
| | - Hao Li
- Key Lab of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, China
| | - Zongcai Tu
- Key Lab of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, China
| | - Xiaolan Wang
- Key Lab of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, China
- * E-mail:
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14
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Tan Y, Zhang R, Chen G, Wang S, Li C, Xu Y, Kan J. Effect of different starter cultures on the control of biogenic amines and quality change of douchi by rapid fermentation. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.04.041] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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15
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Zhu Y, Cao Y, Yang M, Wen P, Cao L, Ma J, Zhang Z, Zhang W. Bacterial diversity and community in Qula from the Qinghai-Tibetan Plateau in China. PeerJ 2018; 6:e6044. [PMID: 30568858 PMCID: PMC6286660 DOI: 10.7717/peerj.6044] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 10/31/2018] [Indexed: 01/17/2023] Open
Abstract
Qula is a cheese-like product usually prepared with unpasteurized yak milk under open conditions, with both endogenous and exogenous microorganisms involved in the fermentation process. In the present study, 15 Qula samples were collected from five different regions in China to investigate the diversity of microbial communities using high-throughput sequencing targeting the V3–V4 region of 16S rRNA gene. The bacterial diversity significantly differed among samples of different origins, indicating a possible effect of geography. The result also showed that microbial communities significantly differed in samples of different origin and these differences were greater at the genus than the phylum level. A total of six phyla were identified in the samples, and Firmicutes and Proteobacteria had a relative abundance >20%. A total of 73 bacterial genera were identified in the samples. Two dominant genera (Lactobacillus and Acetobacter) were common to all samples, and a total of 47 operational taxonomic units at different levels significantly differed between samples of different origin. The predicted functional genes of the bacteria present in samples also indicated differences in bacterial communities between the samples of different origin. The network analysis showed that microbial interactions between bacterial communities in Qula were very complex. This study lays a foundation for further investigations into its food ecology.
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Affiliation(s)
- Yan Zhu
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Yingying Cao
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Min Yang
- College of Science, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Pengchen Wen
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Lei Cao
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Jiang Ma
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Zhongmin Zhang
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, Gansu, China
| | - Weibing Zhang
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, Gansu, China
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Biogenic amines analysis and microbial contribution in traditional fermented food of Douchi. Sci Rep 2018; 8:12567. [PMID: 30135497 PMCID: PMC6105706 DOI: 10.1038/s41598-018-30456-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 07/30/2018] [Indexed: 12/19/2022] Open
Abstract
Biogenic amines (BAs) have been reported to threaten the Douchi safety, while the BAs formation mechanism and corresponding control method have not been clarified for Douchi. The present study aims to investigate the microbial contribution to BAs in Douchi, and to find the beneficial strain for BAs control. Firstly, the BAs profiles of 15 Douchi samples were analyzed, and common 6 kinds of BAs were detected from different samples. All the samples showed the total BAs contents within the safe dosage range, while the histamine concentrations in 2 samples and β-phenethylamine in 6 samples were above the toxic level. Then, the bacterial and fungal communities were investigated by high-throughput sequencing analysis, and Bacillus and Candida were identified as the dominant bacteria and fungi genus, respectively. Furthermore, nineteen strains were selected from the dominant species of Douchi samples, including 14 Bacillus strains, 2 Staphylococcus strains, 1 Enterococcus strain and 2 Candida strains, and their BAs formation and degradation abilities were evaluated. B. subtilis HB-1 and S. pasteuri JX-2 showed no BAs producing ability, and B. subtilis GD-4 and Candida sp. JX-3 exhibited high BAs degradation ability. Finally, fermented soybean model analysis further verified that B. subtilis HB-1 and S. pasteuri JX-2 could significantly reduce BAs. This study not only contributed to understanding the BAs formation mechanism in Douchi, but also provided potential candidates to control the BAs in fermented soybean products.
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Zhang W, Luo Q, Zhu Y, Ma J, Cao L, Yang M, Wen P, Zhang Z, He X. Microbial diversity in two traditional bacterial douchi from Gansu province in northwest China using Illumina sequencing. PLoS One 2018; 13:e0194876. [PMID: 29570735 PMCID: PMC5865742 DOI: 10.1371/journal.pone.0194876] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 03/12/2018] [Indexed: 12/13/2022] Open
Abstract
Douchi has been consumed as a flavoring ingredient for centuries. During production of douchi, numerous microorganisms play important roles in the hydrolysis and conversion of proteins and starch, which are related to the quality and flavor of the end product. Therefore, in the present study, the microbial diversity in two types of home-made traditional bacterial douchi from Gansu province in northwest China was studied by high-throughput sequencing, and a corresponding analysis of the bacterial and fungal communities were conducted. The results showed that geography may have impacted the fungal diversity and the bacterial and fungal species richness in the samples. The results also showed that the microbial community was significantly different in samples of different origin and the difference in the microbial community at the genus level was greater than at phylum level. Two dominant bacterial genera (Bacillus and Ignatzschineria) were common to the two samples, both of which had a relative abundance of more than 1%. Four bacterial genera (Staphylococcus, Aerococcus, Geobacillus, and Jeotgalicoccus) were dominant only in the sample from Qingyang, while another four (Carnobacterium, Proteus, Aneurinibacillus, and Enterococcus) were dominant only in the sample from Longnan. Two dominant fungal genera (Pichia and Candida) were shared by the two samples. Additionally, two genera (Rhodosporidium and Yarrowia) were dominant only in samples from Longnan. The functional genes of the bacteria present in samples indicated that a significant difference was observed in the bacterial community between samples of different origin. We also found that microbial interactions between bacterial and fungal communities in the samples were very complex. This study provides previously unknown information regarding the impact of the environment on microbial communities in douchi and lays a foundation for further investigations into food ecology in bacterial douchi.
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MESH Headings
- Bacillus/classification
- Bacillus/genetics
- Bacillus/isolation & purification
- Bacteria/classification
- Bacteria/genetics
- Bacteria/isolation & purification
- Biodiversity
- China
- DNA, Bacterial/chemistry
- DNA, Bacterial/isolation & purification
- DNA, Bacterial/metabolism
- Food Microbiology
- Fungi/classification
- Fungi/genetics
- High-Throughput Nucleotide Sequencing
- Phylogeny
- RNA, Ribosomal, 16S/chemistry
- RNA, Ribosomal, 16S/isolation & purification
- RNA, Ribosomal, 16S/metabolism
- Sequence Analysis, DNA
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Affiliation(s)
- Weibing Zhang
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China
| | - Qiaoqiao Luo
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China
| | - Yan Zhu
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China
| | - Jiang Ma
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China
| | - Lei Cao
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China
| | - Min Yang
- College of Science, Gansu Agricultural University, Lanzhou, China
| | - Pencheng Wen
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China
| | - Zhongmin Zhang
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China
| | - Xiaoling He
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China
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Yang L, Yang HL, Tu ZC, Wang XL. High-Throughput Sequencing of Microbial Community Diversity and Dynamics during Douchi Fermentation. PLoS One 2016; 11:e0168166. [PMID: 27992473 PMCID: PMC5167551 DOI: 10.1371/journal.pone.0168166] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Accepted: 11/24/2016] [Indexed: 12/02/2022] Open
Abstract
Douchi is a type of Chinese traditional fermented food that is an important source of protein and is used in flavouring ingredients. The end product is affected by the microbial community present during fermentation, but exactly how microbes influence the fermentation process remains poorly understood. We used an Illumina MiSeq approach to investigate bacterial and fungal community diversity during both douchi-koji making and fermentation. A total of 181,443 high quality bacterial 16S rRNA sequences and 221,059 high quality fungal internal transcribed spacer reads were used for taxonomic classification, revealing eight bacterial and three fungal phyla. Firmicutes, Actinobacteria and Proteobacteria were the dominant bacterial phyla, while Ascomycota and Zygomycota were the dominant fungal phyla. At the genus level, Staphylococcus and Weissella were the dominant bacteria, while Aspergillus and Lichtheimia were the dominant fungi. Principal coordinate analysis showed structural separation between the composition of bacteria in koji making and fermentation. However, multivariate analysis of variance based on unweighted UniFrac distances did identify distinct differences (p <0.05), and redundancy analysis identified two key genera that are largely responsible for the differences in bacterial composition between the two steps. Staphylococcus was enriched in koji making, while Corynebacterium was enriched in fermentation. This is the first investigation to integrate douchi fermentation and koji making and fermentation processes through this technological approach. The results provide insight into the microbiome of the douchi fermentation process, and reveal a structural separation that may be stratified by the environment during the production of this traditional fermented food.
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Affiliation(s)
- Lin Yang
- Key Lab of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, China
| | - Hui-lin Yang
- Key Lab of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, China
| | - Zong-cai Tu
- Key Lab of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, China
| | - Xiao-lan Wang
- Key Lab of Protection and Utilization of Subtropic Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, China
- * E-mail:
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