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Mahadeo K, Taïbi A, Meile JC, Côme B, Gauvin-Bialecki A, Boubakri H, Herrera-Belaroussi A, Kodja H. Exploring endophytic bacteria communities of Vanilla planifolia. BMC Microbiol 2024; 24:218. [PMID: 38902615 PMCID: PMC11188167 DOI: 10.1186/s12866-024-03362-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 06/04/2024] [Indexed: 06/22/2024] Open
Abstract
BACKGROUND Rhizosphere bacterial community and endophytes are now known to influence plant health and response to environmental stress. Very few studies have reported the diversity of endophytic bacterial communities of Vanilla planifolia and their potential roles in promoting plant growth or contributing to aromatic quality. RESULTS In this study, the composition and diversity of the Vanilla rhizosphere bacterial community were explored by analyzing rhizosphere soil and root tissue samples as well as green pods of three accessions of Vanilla planifolia grown on different types of substrates (compost and leaf litter). In addition, the endophytic bacterial diversity of roots and green pods as well as the evolution of endophytic bacteria after the curing process of vanilla green pods were analyzed based on a metabarcoding approach. The results showed that bacterial species richness and diversity were higher in the compost. The analysis of the soil bacterial composition displayed that Halomonas, Pseudoalteromonas, Enterobacter and Bradyrhizobium were the most abundant genera. Moreover, the results indicated that the soil bacterial community structure was linked to the host plant genotype. Regarding the roots endophytic bacteria composition, the genera Halomonas, Pseudoalteromonas, Bacillus and Carboxydocella genera were present in all samples, independently from the substrate nature. Several genera including Bacillus, Bradyrhizobium, Burkholderia and Halomonas were transmitted internally from the roots to the green pods. The curing process reduced the bacterial richness and bacterial diversity associated with the green pods. Halomonas, Pseudoalteromonas, Bacillus, and Carboxydocella are the dominant genera in the pods after the curing process. CONCLUSIONS This study provides an overview of changes of the bacterial communities dynamics especially endophytic in the roots and the green pods. It highlighted bacterial genera (Halomonas, Pseudoalteromonas, Bacillus, and Carboxydocella) potentially implicated in the formation of aroma compounds of vanilla beans.
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Affiliation(s)
- Keshika Mahadeo
- Laboratoire de Chimie et Biotechnologie des Produits Naturels, Faculté des Sciences et Technologies, Université de la Réunion, 15 Avenue René Cassin, CS 92 003, 97 744 St Denis Cedex 9, La Réunion, France
| | - Ahmed Taïbi
- QualiSud, Université de La Réunion, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, Montpellier, France
| | - Jean-Christophe Meile
- QualiSud, Université de La Réunion, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, Montpellier, France
| | - Bertrand Côme
- La Vanilleraie, 2 ter Domaine du Grand Hazier, allée Chassagne, Sainte Suzanne, Réunion, 97441, France
| | - Anne Gauvin-Bialecki
- Laboratoire de Chimie et Biotechnologie des Produits Naturels, Faculté des Sciences et Technologies, Université de la Réunion, 15 Avenue René Cassin, CS 92 003, 97 744 St Denis Cedex 9, La Réunion, France
| | - Hasna Boubakri
- Laboratoire d'Ecologie Microbienne, Université Claude Bernard Lyon 1, UMR CNRS 5557, UMR INRAE 1418, VetAgro Sup, Villeurbanne, 69622, France
| | - Aude Herrera-Belaroussi
- Laboratoire d'Ecologie Microbienne, Université Claude Bernard Lyon 1, UMR CNRS 5557, UMR INRAE 1418, VetAgro Sup, Villeurbanne, 69622, France
| | - Hippolyte Kodja
- QualiSud, Université de La Réunion, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, Montpellier, France.
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Vale ADS, Pereira CMT, De Dea Lindner J, Rodrigues LRS, Kadri NKE, Pagnoncelli MGB, Kaur Brar S, Soccol CR, Pereira GVDM. Exploring Microbial Influence on Flavor Development during Coffee Processing in Humid Subtropical Climate through Metagenetic-Metabolomics Analysis. Foods 2024; 13:1871. [PMID: 38928813 PMCID: PMC11203001 DOI: 10.3390/foods13121871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 06/08/2024] [Accepted: 06/11/2024] [Indexed: 06/28/2024] Open
Abstract
Research into microbial interactions during coffee processing is essential for developing new methods that adapt to climate change and improve flavor, thus enhancing the resilience and quality of global coffee production. This study aimed to investigate how microbial communities interact and contribute to flavor development in coffee processing within humid subtropical climates. Employing Illumina sequencing for microbial dynamics analysis, and high-performance liquid chromatography (HPLC) integrated with gas chromatography-mass spectrometry (GC-MS) for metabolite assessment, the study revealed intricate microbial diversity and associated metabolic activities. Throughout the fermentation process, dominant microbial species included Enterobacter, Erwinia, Kluyvera, and Pantoea from the prokaryotic group, and Fusarium, Cladosporium, Kurtzmaniella, Leptosphaerulina, Neonectria, and Penicillium from the eukaryotic group. The key metabolites identified were ethanol, and lactic, acetic, and citric acids. Notably, the bacterial community plays a crucial role in flavor development by utilizing metabolic versatility to produce esters and alcohols, while plant-derived metabolites such as caffeine and linalool remain stable throughout the fermentation process. The undirected network analysis revealed 321 interactions among microbial species and key substances during the fermentation process, with Enterobacter, Kluyvera, and Serratia showing strong connections with sugar and various volatile compounds, such as hexanal, benzaldehyde, 3-methylbenzaldehyde, 2-butenal, and 4-heptenal. These interactions, including inhibitory effects by Fusarium and Cladosporium, suggest microbial adaptability to subtropical conditions, potentially influencing fermentation and coffee quality. The sensory analysis showed that the final beverage obtained a score of 80.83 ± 0.39, being classified as a specialty coffee by the Specialty Coffee Association (SCA) metrics. Nonetheless, further enhancements in acidity, body, and aftertaste could lead to a more balanced flavor profile. The findings of this research hold substantial implications for the coffee industry in humid subtropical regions, offering potential strategies to enhance flavor quality and consistency through controlled fermentation practices. Furthermore, this study contributes to the broader understanding of how microbial ecology interplays with environmental factors to influence food and beverage fermentation, a topic of growing interest in the context of climate change and sustainable agriculture.
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Affiliation(s)
- Alexander da Silva Vale
- Department of Bioprocess Engineering and Biotechnology, Federal University of Paraná (UFPR), Curitiba 81530-900, PR, Brazil (C.R.S.)
| | - Cecília Marques Tenório Pereira
- Department of Food Science and Technology, Federal University of Santa Catarina (UFSC), Florianópolis 88034-000, SC, Brazil; (C.M.T.P.); (J.D.D.L.)
| | - Juliano De Dea Lindner
- Department of Food Science and Technology, Federal University of Santa Catarina (UFSC), Florianópolis 88034-000, SC, Brazil; (C.M.T.P.); (J.D.D.L.)
| | - Luiz Roberto Saldanha Rodrigues
- Graduate Program in Biotechnology, Federal Technological University of Paraná (UTFPR), Dois Vizinhos 85660-000, PR, Brazil; (L.R.S.R.); (M.G.B.P.)
| | - Nájua Kêmil El Kadri
- Department of Bioprocess Engineering and Biotechnology, Federal University of Paraná (UFPR), Curitiba 81530-900, PR, Brazil (C.R.S.)
| | - Maria Giovana Binder Pagnoncelli
- Graduate Program in Biotechnology, Federal Technological University of Paraná (UTFPR), Dois Vizinhos 85660-000, PR, Brazil; (L.R.S.R.); (M.G.B.P.)
| | - Satinder Kaur Brar
- Department of Civil Engineering, Lassonde School of Engineering, York University, North York, Toronto, ON M3J 1P3, Canada;
| | - Carlos Ricardo Soccol
- Department of Bioprocess Engineering and Biotechnology, Federal University of Paraná (UFPR), Curitiba 81530-900, PR, Brazil (C.R.S.)
| | - Gilberto Vinícius de Melo Pereira
- Department of Bioprocess Engineering and Biotechnology, Federal University of Paraná (UFPR), Curitiba 81530-900, PR, Brazil (C.R.S.)
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3
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Rocha RAR, da Cruz MAD, Silva LCF, Costa GXR, Amaral LR, Bertarini PLL, Gomes MS, Santos LD. Evaluation of Arabica Coffee Fermentation Using Machine Learning. Foods 2024; 13:454. [PMID: 38338590 PMCID: PMC10855612 DOI: 10.3390/foods13030454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/15/2023] [Accepted: 12/19/2023] [Indexed: 02/12/2024] Open
Abstract
This study explores the variances in the organic, chemical, and sensory attributes of fermented coffee beans, specifically examining how post-harvest processes influence cup quality. Coffee fruits from the Catuaí IAC-144 variety were processed using both natural coffee (NC) and pulped coffee (PC) methods. The fruits were then subjected to self-induced anaerobic fermentation (SIAF) using one of the following fermentation methods: solid-state fermentation (SSF) or submerged fermentation (SMF). Within these methods, either spontaneous fermentation (SPF) or starter culture fermentation (SCF) was applied. Each method was conducted over periods of 24, 48, and 72 h. For this purpose, two-hundred-liter bioreactors were used, along with two control treatments. Numerous parameters were monitored throughout the fermentation process. A comprehensive chemical profiling and sensory analysis, adhering to the guidelines of the Specialty Coffee Association, were conducted to evaluate the influence of these fermentation processes on the flavor, aroma, and body characteristics of the coffee beverage across multiple dimensions. Data analysis and predictive modeling were performed using machine learning techniques. This study found that NC exhibited a higher production of acids (citric, malic, succinic, and lactic) compared to PC, resulting in distinct chemical and sensory profiles. The decision tree showed that fructose and malic and succinic acids were identified as the main factors enhancing sensory notes during cupping. SMF promoted higher concentrations of lactic acid, while SSF led to increased ethanol content. Consequently, the SIAF process enhances the sensory quality of coffee, adding value to the product by generating diverse sensory profiles.
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Affiliation(s)
- Renata A. R. Rocha
- Biotechnology Institute, University Federal of Uberlândia, Patos de Minas 38700-002, MG, Brazil; (R.A.R.R.); (M.A.D.d.C.); (L.C.F.S.)
| | - Marcelo A. D. da Cruz
- Biotechnology Institute, University Federal of Uberlândia, Patos de Minas 38700-002, MG, Brazil; (R.A.R.R.); (M.A.D.d.C.); (L.C.F.S.)
| | - Lívia C. F. Silva
- Biotechnology Institute, University Federal of Uberlândia, Patos de Minas 38700-002, MG, Brazil; (R.A.R.R.); (M.A.D.d.C.); (L.C.F.S.)
| | - Gisele X. R. Costa
- Faculty of Chemical Engineering, Federal University of Uberlândia, Patos de Minas 38702-178, MG, Brazil;
| | - Laurence R. Amaral
- Laboratory of Bioinformatics and Molecular Analysis (LBAM), Federal University of Uberlândia, Patos de Minas 38702-178, MG, Brazil; (L.R.A.); (M.S.G.)
| | - Pedro L. L. Bertarini
- Faculty of Electrical Engineering, Federal University of Uberlândia, Patos de Minas 38702-178, MG, Brazil;
| | - Matheus S. Gomes
- Laboratory of Bioinformatics and Molecular Analysis (LBAM), Federal University of Uberlândia, Patos de Minas 38702-178, MG, Brazil; (L.R.A.); (M.S.G.)
| | - Líbia D. Santos
- Faculty of Chemical Engineering, Federal University of Uberlândia, Patos de Minas 38702-178, MG, Brazil;
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Muradova M, Proskura A, Canon F, Aleksandrova I, Schwartz M, Heydel JM, Baranenko D, Nadtochii L, Neiers F. Unlocking Flavor Potential Using Microbial β-Glucosidases in Food Processing. Foods 2023; 12:4484. [PMID: 38137288 PMCID: PMC10742834 DOI: 10.3390/foods12244484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/07/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023] Open
Abstract
Aroma is among of the most important criteria that indicate the quality of food and beverage products. Aroma compounds can be found as free molecules or glycosides. Notably, a significant portion of aroma precursors accumulates in numerous food products as nonvolatile and flavorless glycoconjugates, termed glycosidic aroma precursors. When subjected to enzymatic hydrolysis, these seemingly inert, nonvolatile glycosides undergo transformation into fragrant volatiles or volatiles that can generate odor-active compounds during food processing. In this context, microbial β-glucosidases play a pivotal role in enhancing or compromising the development of flavors during food and beverage processing. β-glucosidases derived from bacteria and yeast can be utilized to modulate the concentration of particular aroma and taste compounds, such as bitterness, which can be decreased through hydrolysis by glycosidases. Furthermore, oral microbiota can influence flavor perception by releasing volatile compounds that can enhance or alter the perception of food products. In this review, considering the glycosidic flavor precursors present in diverse food and beverage products, we underscore the significance of glycosidases with various origins. Subsequently, we delve into emerging insights regarding the release of aroma within the human oral cavity due to the activity of oral microbial glycosidases.
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Affiliation(s)
- Mariam Muradova
- Molecular Mechanisms of Flavor Perception, Center for Taste and Feeding Behavior, INRAE, CNRS, University of Burgundy Franche-Comté, 21000 Dijon, France; (A.P.); (F.C.); (M.S.); (J.-M.H.)
- International Research Center “Biotechnologies of the Third Millennium”, Faculty of Biotechnologies (BioTech), ITMO University, 191002 Saint-Petersburg, Russia; (I.A.); (L.N.)
| | - Alena Proskura
- Molecular Mechanisms of Flavor Perception, Center for Taste and Feeding Behavior, INRAE, CNRS, University of Burgundy Franche-Comté, 21000 Dijon, France; (A.P.); (F.C.); (M.S.); (J.-M.H.)
- International Research Center “Biotechnologies of the Third Millennium”, Faculty of Biotechnologies (BioTech), ITMO University, 191002 Saint-Petersburg, Russia; (I.A.); (L.N.)
| | - Francis Canon
- Molecular Mechanisms of Flavor Perception, Center for Taste and Feeding Behavior, INRAE, CNRS, University of Burgundy Franche-Comté, 21000 Dijon, France; (A.P.); (F.C.); (M.S.); (J.-M.H.)
| | - Irina Aleksandrova
- International Research Center “Biotechnologies of the Third Millennium”, Faculty of Biotechnologies (BioTech), ITMO University, 191002 Saint-Petersburg, Russia; (I.A.); (L.N.)
| | - Mathieu Schwartz
- Molecular Mechanisms of Flavor Perception, Center for Taste and Feeding Behavior, INRAE, CNRS, University of Burgundy Franche-Comté, 21000 Dijon, France; (A.P.); (F.C.); (M.S.); (J.-M.H.)
| | - Jean-Marie Heydel
- Molecular Mechanisms of Flavor Perception, Center for Taste and Feeding Behavior, INRAE, CNRS, University of Burgundy Franche-Comté, 21000 Dijon, France; (A.P.); (F.C.); (M.S.); (J.-M.H.)
| | - Denis Baranenko
- International Research Center “Biotechnologies of the Third Millennium”, Faculty of Biotechnologies (BioTech), ITMO University, 191002 Saint-Petersburg, Russia; (I.A.); (L.N.)
| | - Liudmila Nadtochii
- International Research Center “Biotechnologies of the Third Millennium”, Faculty of Biotechnologies (BioTech), ITMO University, 191002 Saint-Petersburg, Russia; (I.A.); (L.N.)
| | - Fabrice Neiers
- Molecular Mechanisms of Flavor Perception, Center for Taste and Feeding Behavior, INRAE, CNRS, University of Burgundy Franche-Comté, 21000 Dijon, France; (A.P.); (F.C.); (M.S.); (J.-M.H.)
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5
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Vaz CJT, de Menezes LS, de Santana RC, Sentanin MA, Zotarelli MF, Guidini CZ. Effect of fermentation on the physicochemical characteristics and sensory quality of Arabica coffee. 3 Biotech 2023; 13:403. [PMID: 37982081 PMCID: PMC10654292 DOI: 10.1007/s13205-023-03768-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 09/06/2023] [Indexed: 11/21/2023] Open
Abstract
This work aims to assess the physicochemical characteristics and final sensory quality of Yellow Catuai IAC 62 Arabica coffee fermented with Saccharomyces cerevisiae. For such a purpose, a Composite Central Rotational Design (CCRD) was performed to investigate how fermentation time,temperature and pH conditions, moisture content and concentration of sugars and organic acids affect its sensory quality on two different roast levels in accordance with Specialty Coffee Association (SCA) protocols. It was found that fructose concentration decreased from 12 g/L to around 5 g/L during fermentation, regardless of temperature condition. Furthermore, longer fermentation times and higher temperatures have lowered sucrose and glucose concentrations from 4 to 2 g/L and 7 g/L to zero, respectively. Glycerol concentration was higher as time and temperature increased, and optimal conditions ranged at temperatures between 24 °C and 32 °C from 35 to 45 h of fermentation time. pH decreased as fermentation time elapsed, but there was a more significant reduction due to higher temperatures, starting at around pH 5 and, lower than 4 under extreme conditions. Contents of organic acids such as acetic, propionic, succinic, and lactic acids, were measured at the final stage of each fermentation process under studied conditions. It was observed that coffee samples achieved final scores ranging from 81 to 85 (SCA score), even in longer times and extreme temperature conditions, thus all samples have been classified as specialty coffees. This work described the initial step towards parameterizing fermentation processes, given that the response variables of temperature and fermentation time, were optimal and enhanced the sensory quality of coffee as beverage. Saccharomyces cerevisiae, a commercial product which has already been made available for producers, can ensure an increase in the sensory quality of coffee.
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Affiliation(s)
- Carlos Johnantan Tolentino Vaz
- Multidisciplinary Research, Science and Technology Network (RMPCT), Federal University of Uberlândia, School of Chemical Engineering, Patos de Minas, MG 38700-126 Brazil
| | - Larissa Soares de Menezes
- Multidisciplinary Research, Science and Technology Network (RMPCT), Federal University of Uberlândia, School of Chemical Engineering, Patos de Minas, MG 38700-126 Brazil
| | - Ricardo Corrêa de Santana
- Multidisciplinary Research, Science and Technology Network (RMPCT), Federal University of Uberlândia, School of Chemical Engineering, Patos de Minas, MG 38700-126 Brazil
| | - Michelle Andriati Sentanin
- Multidisciplinary Research, Science and Technology Network (RMPCT), Federal University of Uberlândia, School of Chemical Engineering, Patos de Minas, MG 38700-126 Brazil
| | - Marta Fernanda Zotarelli
- Multidisciplinary Research, Science and Technology Network (RMPCT), Federal University of Uberlândia, School of Chemical Engineering, Patos de Minas, MG 38700-126 Brazil
| | - Carla Zanella Guidini
- Multidisciplinary Research, Science and Technology Network (RMPCT), Federal University of Uberlândia, School of Chemical Engineering, Patos de Minas, MG 38700-126 Brazil
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6
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Febrianto NA, Zhu F. Coffee bean processing: Emerging methods and their effects on chemical, biological and sensory properties. Food Chem 2023; 412:135489. [PMID: 36716620 DOI: 10.1016/j.foodchem.2023.135489] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 12/29/2022] [Accepted: 01/12/2023] [Indexed: 01/18/2023]
Abstract
Emerging processing methods have been applied in coffee bean processing for improved sensory quality. The processes focus on optimizing the fermentation process of the coffee cherries and beans. This involves various pathways, including the formation of volatiles, flavor precursors and organic acids and the reduction in the concentrations of bioactive compounds. Comprehensive information regarding the effect of these emerging processes on the chemical, biological and sensory properties of the coffee beans is summarized. Emerging processes affected the coffee bean to various degrees depending on the raw material and the method used. The emerging methods promoted the reduction of bioactives such as caffeine and phenolics in coffee beans. Substantial improvement of these processes is needed to obtain coffee beans with improved biological activities. Effort to simplify the methods and optimize the post-fermentation process is crucial for the methods to be easily accessible by the producers and to produce defect-free coffee beans.
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Affiliation(s)
- Noor Ariefandie Febrianto
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand; Indonesian Coffee and Cocoa Research Institute (ICCRI), Jl. PB Sudirman No. 90 Jember, East Java, Indonesia
| | - Fan Zhu
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
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7
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Wang Y, Wang X, Hu G, Zhang Z, Al-Romaima A, Bai X, Li J, Zhou L, Li Z, Qiu M. Comparative studies of fermented coffee fruits post-treatments on chemical and sensory properties of roasted beans in Yunnan, China. Food Chem 2023; 423:136332. [PMID: 37182497 DOI: 10.1016/j.foodchem.2023.136332] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 04/24/2023] [Accepted: 05/05/2023] [Indexed: 05/16/2023]
Abstract
In this study, medium roasted coffee with four different fermented coffee fruits post-treatments (dry, wet, semi-dry and hot air dry) was used as the material. Chemical profile and sensorial analysis were used to comprehensively analyze the effects of post-treatments on coffee flavor characteristics from multiple dimensions. A total of 31 water-soluble chemical components and 39 volatile compounds were identified in roasted coffee, and distinct post-treatments based on chemical orientation make coffee highly differentiated. In addition, the principal component analysis (PCA) of the chemical composition integrated data set showed that the first two principal components could explain 54.9% of the sample variability. All four post-treatments can be classified as "specialty coffees" according to the Specialty Coffee Association (SCA) protocol, with various organoleptic characteristics and flavor attributes. As a result, the fermented coffee fruits post-treatment method further determines the quality characteristics of coffee, thus meeting the needs of different niche markets.
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Affiliation(s)
- Yanbing Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China; Dehong Tropical Agriculture Research Institute of Yunnan, Ruili 678600, Yunnan, PR China; College of Agriculture, Guangxi University, Nanning 530004, Guangxi, PR China
| | - Xiaoyuan Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China; Dehong Tropical Agriculture Research Institute of Yunnan, Ruili 678600, Yunnan, PR China; College of Agriculture, Guangxi University, Nanning 530004, Guangxi, PR China.
| | - Guilin Hu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China
| | - Zhirun Zhang
- Dehong Tropical Agriculture Research Institute of Yunnan, Ruili 678600, Yunnan, PR China
| | - Abdulbaset Al-Romaima
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China
| | - Xuehui Bai
- Dehong Tropical Agriculture Research Institute of Yunnan, Ruili 678600, Yunnan, PR China
| | - Jinhong Li
- Dehong Tropical Agriculture Research Institute of Yunnan, Ruili 678600, Yunnan, PR China
| | - Lin Zhou
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China
| | - Zhongrong Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China
| | - Minghua Qiu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, PR China.
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Pop OL, Suharoschi R, Socaci SA, Berger Ceresino E, Weber A, Gruber-Traub C, Vodnar DC, Fărcaș AC, Johansson E. Polyphenols—Ensured Accessibility from Food to the Human Metabolism by Chemical and Biotechnological Treatments. Antioxidants (Basel) 2023; 12:antiox12040865. [PMID: 37107240 PMCID: PMC10135483 DOI: 10.3390/antiox12040865] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 03/27/2023] [Accepted: 03/29/2023] [Indexed: 04/05/2023] Open
Abstract
Polyphenols are plant-based compounds famous for their positive impact on both human health and the quality of food products. The benefits of polyphenols are related to reducing cardiovascular diseases, cholesterol management, cancers, and neurological disorders in humans and increasing the shelf life, management of oxidation, and anti-microbial activity in food products. The bioavailability and bio-accessibility of polyphenols are of the highest importance to secure their impact on human and food health. This paper summarizes the current state-of-the-art approaches on how polyphenols can be made more accessible in food products to contribute to human health. For example, by using food processing methods including various technologies, such as chemical and biotechnological treatments. Food matrix design and simulation procedures, in combination with encapsulation of fractionated polyphenols utilizing enzymatic and fermentation methodology, may be the future technologies to tailor specific food products with the ability to ensure polyphenol release and availability in the most suitable parts of the human body (bowl, intestine, etc.). The development of such new procedures for utilizing polyphenols, combining novel methodologies with traditional food processing technologies, has the potential to contribute enormous benefits to the food industry and health sector, not only reducing food waste and food-borne illnesses but also to sustain human health.
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Affiliation(s)
- Oana Lelia Pop
- Department of Food Science, University of Agricultural Sciences and Veterinary Medicine, 400372 Cluj-Napoca, Romania
- Molecular Nutrition and Proteomics Laboratory, Institute of Life Sciences, University of Agricultural Sciences and Veterinary Medicine, 400372 Cluj-Napoca, Romania
| | - Ramona Suharoschi
- Department of Food Science, University of Agricultural Sciences and Veterinary Medicine, 400372 Cluj-Napoca, Romania
- Molecular Nutrition and Proteomics Laboratory, Institute of Life Sciences, University of Agricultural Sciences and Veterinary Medicine, 400372 Cluj-Napoca, Romania
| | - Sonia Ancuța Socaci
- Department of Food Science, University of Agricultural Sciences and Veterinary Medicine, 400372 Cluj-Napoca, Romania
| | - Elaine Berger Ceresino
- Department of Plant Breeding, The Swedish University of Agricultural Sciences, P.O. Box 190, SE-234 22 Lomma, Sweden
| | - Achim Weber
- Innovation Field Functional Surfaces and Materials, Fraunhofer Institute for Interfacial Engineering and Biotechnology, Nobelstraße 12, 70569 Stuttgart, Germany
| | - Carmen Gruber-Traub
- Innovation Field Functional Surfaces and Materials, Fraunhofer Institute for Interfacial Engineering and Biotechnology, Nobelstraße 12, 70569 Stuttgart, Germany
| | - Dan Cristian Vodnar
- Department of Food Science, University of Agricultural Sciences and Veterinary Medicine, 400372 Cluj-Napoca, Romania
| | - Anca Corina Fărcaș
- Department of Food Science, University of Agricultural Sciences and Veterinary Medicine, 400372 Cluj-Napoca, Romania
| | - Eva Johansson
- Department of Plant Breeding, The Swedish University of Agricultural Sciences, P.O. Box 190, SE-234 22 Lomma, Sweden
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Zhang S, Page-Zoerkler N, Genevaz A, Roubaty C, Pollien P, Bordeaux M, Mestdagh F, Moccand C. Unlocking the Aromatic Potential of Native Coffee Yeasts: From Isolation to a Biovolatile Platform. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:4665-4674. [PMID: 36916533 PMCID: PMC10037330 DOI: 10.1021/acs.jafc.2c08263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 02/28/2023] [Accepted: 03/01/2023] [Indexed: 06/18/2023]
Abstract
Postharvest processing of coffee has been shown to impact cup quality. Yeasts are known to modulate the sensory traits of the final cup of coffee after controlled fermentation at the farm. Here, we enumerated native coffee yeasts in a Nicaraguan farm during dry and semidry postharvest processing of Arabica and Robusta beans. Subsequently, 90 endogenous yeast strains were selected from the collected endogenous isolates, identified, and subjected to high-throughput fermentation and biovolatile generation in a model system mimicking postharvesting conditions. Untargeted volatile analysis by SPME-GC-MS enabled the identification of key aroma compounds generated by the yeast pool and demonstrated differences among strains. Several genera, including Pichia, Candida, and Hanseniaspora, showed both strain- and species-level variability in volatile generation and profiles. This fermentation platform and biovolatile database could represent a versatile opportunity to accelerate the development of yeast starter cultures for generating specific and desired sensory attributes in the final cup of coffee.
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Affiliation(s)
| | | | - Aliénor Genevaz
- Nestlé
Research, Vers-Chez-Les-Blanc, 1000 Lausanne 26, Switzerland
| | - Claudia Roubaty
- Nestlé
Research, Vers-Chez-Les-Blanc, 1000 Lausanne 26, Switzerland
| | - Philippe Pollien
- Nestlé
Research, Vers-Chez-Les-Blanc, 1000 Lausanne 26, Switzerland
| | | | - Frederic Mestdagh
- Nestlé
Nespresso S.A., Route
de Lausanne 2, 1680 Romont, Switzerland
| | - Cyril Moccand
- Nestlé
Research, Vers-Chez-Les-Blanc, 1000 Lausanne 26, Switzerland
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10
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Fang GY, Mu XJ, Huang BW, Wu GZ, Jiang YJ. Fungal biodiversity and interaction complexity were the important drivers of multifunctionality for flavor production in a spontaneously fermented vinegar. INNOV FOOD SCI EMERG 2022. [DOI: 10.1016/j.ifset.2022.103259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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11
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Pua A, Goh RMV, Huang Y, Tang VCY, Ee KH, Cornuz M, Liu SQ, Lassabliere B, Yu B. Recent advances in analytical strategies for coffee volatile studies: Opportunities and challenges. Food Chem 2022; 388:132971. [PMID: 35462220 DOI: 10.1016/j.foodchem.2022.132971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 04/08/2022] [Accepted: 04/10/2022] [Indexed: 11/29/2022]
Abstract
Coffee has attracted significant research interest owing to its complex volatile composition and aroma, which imparts a pleasant sensorial experience that remains challenging to analyse and interpret. This review summarises analytical challenges associated with coffee's volatile and matrix complexity, and recent developments in instrumental techniques to resolve them. The benefits of state-of-the-art analytical techniques applied to coffee volatile analysis from experimental design to sample preparation, separation, detection, and data analysis are evaluated. Complementary method selection coupled with progressive experimental design and data analysis are vital to unravel the increasing comprehensiveness of coffee volatile datasets. Considering this, analytical workflows for conventional, targeted, and untargeted coffee volatile analyses are thus proposed considering the trends towards sorptive extraction, multidimensional gas chromatography, and high-resolution mass spectrometry. In conclusion, no single analytical method addresses coffee's complexity in its entirely, and volatile analysis must be tailored to the key objectives and concerns of the analyst.
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Affiliation(s)
- Aileen Pua
- Mane SEA Pte Ltd, 3 Biopolis Drive, #07-17/18/19 Synapse, Singapore 138623, Sigapore; Department of Food Science and Technology, National University of Singapore, S14 Level 5, Science Drive 2, Singapore 117542, Sigapore
| | - Rui Min Vivian Goh
- Mane SEA Pte Ltd, 3 Biopolis Drive, #07-17/18/19 Synapse, Singapore 138623, Sigapore
| | - Yunle Huang
- Mane SEA Pte Ltd, 3 Biopolis Drive, #07-17/18/19 Synapse, Singapore 138623, Sigapore; Department of Food Science and Technology, National University of Singapore, S14 Level 5, Science Drive 2, Singapore 117542, Sigapore
| | - Vivien Chia Yen Tang
- Mane SEA Pte Ltd, 3 Biopolis Drive, #07-17/18/19 Synapse, Singapore 138623, Sigapore
| | - Kim-Huey Ee
- Mane SEA Pte Ltd, 3 Biopolis Drive, #07-17/18/19 Synapse, Singapore 138623, Sigapore
| | - Maurin Cornuz
- Mane SEA Pte Ltd, 3 Biopolis Drive, #07-17/18/19 Synapse, Singapore 138623, Sigapore
| | - Shao Quan Liu
- Department of Food Science and Technology, National University of Singapore, S14 Level 5, Science Drive 2, Singapore 117542, Sigapore.
| | - Benjamin Lassabliere
- Mane SEA Pte Ltd, 3 Biopolis Drive, #07-17/18/19 Synapse, Singapore 138623, Sigapore
| | - Bin Yu
- Mane SEA Pte Ltd, 3 Biopolis Drive, #07-17/18/19 Synapse, Singapore 138623, Sigapore.
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12
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Yang Z, Zhu X, Wen A, Qin L. Development of probiotics beverage using cereal enzymatic hydrolysate fermented with
Limosilactobacillus reuteri. FOOD SCIENCE & NUTRITION 2022; 10:3143-3153. [PMID: 36171765 PMCID: PMC9469843 DOI: 10.1002/fsn3.2913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 03/22/2022] [Accepted: 04/19/2022] [Indexed: 11/09/2022]
Abstract
Although most probiotic products are milk based, lactose intolerance and vegetarianism inspired the idea of developing nondairy probiotic products. In this study, probiotic beverages were produced from four enzymatically hydrolyzed cereal substrates (coix seed, quinoa, millet, and brown rice) and fermented by Limosilactobacillus reuteri. Fermentation parameters, including pH, titratable acidity, viable count, organic acids, and volatile components were determined. Results showed that the pH values decreased and titratable acidity increased with the fermentation process (p < .05). Although the final pH in all samples was below 4.0, the growth of L. reuteri was not significantly inhibited by low pH. The number of viable bacteria (12.96 log CFU/ml) in coix seed substrate was significantly higher than that in other samples after the fermentation for 24 h (p < .05). Lactic acid and acetic acid were the main organic acids after fermentation and the highest in quinoa (lactic acid: 7.58 mg/ml; acetic acid: 2.23 mg/ml). The flavor analysis indicated that there were differences in the flavor components of different cereal beverages. Forty‐nine volatile compounds were identified in four beverages, including acids, alcohols, aldehydes, ketones, and esters. The results of the electronic tongue showed that the umami taste of the fermented coix seed was better than that of other samples, displaying the more pleasant taste characteristics. In conclusion, it is feasible to prepare probiotic symbiotic cereal beverage with L. reuteri as starter culture. This study provides a reference for the development of nondairy probiotic products.
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Affiliation(s)
- Zhoujie Yang
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education) College of Life Sciences/Institute of Agro‐bioengineering Guizhou University Guiyang Guizhou Province China
| | - Xiaoli Zhu
- School of Liquor and Food Engineering Guizhou University Guiyang Guizhou Province China
| | - Anyan Wen
- School of Liquor and Food Engineering Guizhou University Guiyang Guizhou Province China
| | - Likang Qin
- School of Liquor and Food Engineering Guizhou University Guiyang Guizhou Province China
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13
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Machado JL, Tomaz MA, da Luz JMR, Osório VM, Costa AV, Colodetti TV, Debona DG, Pereira LL. Evaluation of genetic divergence of coffee genotypes using the volatile compounds and sensory attributes profile. J Food Sci 2021; 87:383-395. [PMID: 34907528 DOI: 10.1111/1750-3841.15986] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 10/09/2021] [Accepted: 10/25/2021] [Indexed: 12/30/2022]
Abstract
The quality of the coffee beverage is related to the chemical, physical, and sensory attributes of the coffee beans that vary with the geographic location of the crop, genetic factors, and post-harvest processing. So, the objective of this study was to evaluate the genetic divergence of 27 genotypes of Coffea canephora using the volatile compounds and sensory attributes profile to select genotypes that produce a coffee beverage with high sensory quality. This genetic diversity was estimated from the Euclidean distance matrix using non-standard data and the Unweighted Pair-Group Method Using Arithmetic Averages (UPGMA). The 2-furyl-methanol, 4-ethenyl-2-methoxyphenol, furfural, 5-methylfurfural, methylpyrazine, and 2,6-dimethylpyrazine were predominating volatile compounds in the genotypes. The sensory attributes had a positive Pearson's correlation with the total score. The volatile compounds had a different relative contribution to the genetic divergence between the genotypes of C. canephora. The 4-ethenyl-2-methoxyphenol, 2-furyl-methanol, and furfural were volatile compounds that most contributed to the formation of the groups in the UPGMA dendrogram. The relative contribution of sensory attributes to dissimilarity among genotypes was 6.42% to 20.20%. Therefore, this study verified the relative contribution of volatile compounds, in specially 4-ethenyl-2-methoxyphenol, 2-furyl-methanol, and furfural, and sensory attributes (flavor, mouthfeel, and bitterness/sweetness) to the genetic divergence between the genotypes of the three clonal varieties. Thus, this work points out compounds that positively contribute to the sensory quality of the Conilon coffee beverage.
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Affiliation(s)
- Jéssica Louzada Machado
- Graduate Program in Agrochemistry, Federal University of Espírito Santo/UFES, Alegre, Espírito Santo, Brazil
| | - Marcelo Antonio Tomaz
- Agronomy Department, Federal University of Espírito Santo/UFES, Alegre, Espírito Santo, Brazil
| | | | - Vanessa Moreira Osório
- Chemistry and Physical Department, Federal University of Espírito Santo/UFES, Alegre, Espírito Santo, Brazil
| | - Adilson Vidal Costa
- Chemistry and Physical Department, Federal University of Espírito Santo/UFES, Alegre, Espírito Santo, Brazil
| | | | - Danieli Grancieri Debona
- Department of Coffee Research Analysis Laboratory, Federal Institute of Espírito Santo, Venda Nova do Imigrante, Espírito Santo, Brazil
| | - Lucas Louzada Pereira
- Department of Coffee Research Analysis Laboratory, Federal Institute of Espírito Santo, Venda Nova do Imigrante, Espírito Santo, Brazil
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14
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Wang M, Wang C, Yang C, Peng L, Xie Q, Zheng R, Dai Y, Liu S, Peng X. Effects of Lactobacillus plantarum C7 and Staphylococcus warneri S6 on flavor quality and bacterial diversity of fermented meat rice, a traditional Chinese food. Food Res Int 2021; 150:110745. [PMID: 34865763 DOI: 10.1016/j.foodres.2021.110745] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 09/30/2021] [Accepted: 10/07/2021] [Indexed: 10/20/2022]
Abstract
Fermented meat rice (FMR) is a traditional Chinese fermented food with special flavor and abundant microorganisms. Lactobacillus and Staphylococcus species have been found to be excellent strains in FMR during fermentation. However, their roles in FMR flavor formation remain yet to be elucidated. Here, we investigated the correlation between physicochemical properties and volatile flavor components, as well as the microbial community during FMR fermentation. First, we determined pH, total titratable acids (TTA), proteins, total lipids, organic acids, free amino acids (FAAs), and volatile flavor compounds (VFCs). With increasing fermentation time, inoculation with Lactobacillus plantarum C7+ Staphylococcus warneri S6 (LP + SW) accelerated the decrease in pH, increased TTA, and reduced protein and total lipid content of FMR. In addition, LP + SW inoculation resulted in significantly (P < 0.05) higher contents of β-eudesmol, nerolidol, ethyl caproate, citronellal, lactic acid, and most FAAs (aspartic acid, glutamic acid, alanine, and lysine) in FMR compared to natural fermentation. Second, inoculated fermentation promoted the growth of Lactobacillus plantarum and/or Staphylococcus warneri and inhibited the growth of some potentially pathogenic microorganisms such as Acinetobacter and Enhydrobacter. Lactobacillus and Staphylococcus were found to be highly correlated with the physicochemical properties and VFCs (P < 0.05) of FMR as indicated by redundancy analysis (RDA) and partial least squares (PLS, VIP > 1.0) analysis. Finally, Spearman's correlation (| r | ≥ 0.7, P < 0.05) analysis of SPSS was visualized by the Cytoscape software. The findings suggest that inoculation with L. plantarum C7 and/or S. warneri S6 can significantly improve the flavor quality of FMR.
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Affiliation(s)
- Man Wang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan 430070, China
| | - Chengming Wang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan 430070, China.
| | - Chen Yang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan 430070, China
| | - Luqiu Peng
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan 430070, China
| | - Qihui Xie
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan 430070, China
| | - Runmin Zheng
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan 430070, China
| | - Yiyi Dai
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan 430070, China
| | - Shilin Liu
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; Key Laboratory of Environment Correlative Dietology (Huazhong Agricultural University), Ministry of Education, Wuhan 430070, China
| | - Xitian Peng
- Institute of Agricultural Quality Standards and Testing Technology Research, Hubei Academy of Agricultural Sciences, Wuhan 430070, China
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15
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da Silva Oliveira EC, da Luz JMR, de Castro MG, Filgueiras PR, Guarçoni RC, de Castro EVR, da Silva MDCS, Pereira LL. Chemical and sensory discrimination of coffee: impacts of the planting altitude and fermentation. Eur Food Res Technol 2021. [DOI: 10.1007/s00217-021-03912-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Polanowska K, Varghese R, Kuligowski M, Majcher M. Carob kibbles as an alternative raw material for production of kvass with probiotic potential. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:5487-5497. [PMID: 33682152 DOI: 10.1002/jsfa.11197] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 02/25/2021] [Accepted: 03/07/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Non-diary beverages with probiotic properties are of great interest nowadays. In this research, we evaluated the suitability of carob kibbles in the manufacture of kvass. Kvass is a low-alcohol drink popular in Central and Eastern Europe and indicated as a potential non-diary beverage with probiotic properties. Therefore, the viability of probiotic strains of Lactobacillus plantarum and Saccharomyces boulardii during 4 weeks' storage in manufactured beverages was tested. RESULTS Carob kibbles introduced significant amounts of phenolic compounds into kvasses, especially gallic acid (up to 117.45 ± 10.56 mg L-1 ), and improved antiradical activity up to 78% after fermentation. Moreover, fermentation efficiently reduced furfural and hydroxymethylfurfural content in samples up to 12.9% and 29.9%, respectively. Kvasses with rye malt extract possessed coffee-like, chocolate-like, roasted and caramel-like odours and a more bitter taste. Whereas kvass with carob kibbles was characterized by fruit-like odour and sweeter taste. Fermentation contributed to a creation as well as degradation of volatiles. L. plantarum exhibited higher general mortality during storage, whereas, in the case of S. boulardii, the viability was significantly higher regardless of the sample composition. CONCLUSION This is the first study reporting the use of carob kibbles for kvass production. The obtained results showed that carob kibbles can replace rye malt extract, at least partially, in the production of kvass, giving to the product added health benefits. Moreover, S. boulardii is a better choice for production of kvass with probiotic properties. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Katarzyna Polanowska
- Institute of Food Technology of Plant Origin, Faculty of Food Science and Nutrition, Poznań University of Life Sciences, Poznań, Poland
| | - Reshma Varghese
- Institute of Food Technology of Plant Origin, Faculty of Food Science and Nutrition, Poznań University of Life Sciences, Poznań, Poland
| | - Maciej Kuligowski
- Institute of Food Technology of Plant Origin, Faculty of Food Science and Nutrition, Poznań University of Life Sciences, Poznań, Poland
| | - Małgorzata Majcher
- Institute of Food Technology of Plant Origin, Faculty of Food Science and Nutrition, Poznań University of Life Sciences, Poznań, Poland
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17
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Volatile Organic Compound-Mediated Antifungal Activity of Pichia spp. and Its Effect on the Metabolic Profiles of Fermentation Communities. Appl Environ Microbiol 2021; 87:AEM.02992-20. [PMID: 33608301 DOI: 10.1128/aem.02992-20] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 02/12/2021] [Indexed: 02/07/2023] Open
Abstract
Volatile organic compounds (VOCs) are chemicals responsible for antagonistic activity between microorganisms. The impact of VOCs on microbial community succession of fermentation is not well understood. In this study, Pichia spp. were evaluated for VOC production as a part of antifungal activity during baijiu fermentation. The results showed that the abundance of Pichia in the defect group (agglomerated fermented grains) was lower than that in control group, and a negative interaction between Pichia and Monascus was determined (P < 0.05). In addition, the disruption of fungi was significantly related to the differences of metabolic profiles in fermented grains. To determine production of VOCs from Pichia and its effect on Monascus purpureus, a double-dish system was assessed, and the incidence of M. purpureus reduction was 39.22% after 7 days. As to antifungal volatile compounds, 2-phenylethanol was identified to have an antifungal effect on M. purpureus through contact and noncontact. To further confirm the antifungal activity of 2-phenylethanol, scanning electron microscopy showed that 2-phenylethanol widely and significantly inhibited conidium germination and mycelial growth of filamentous fungi. Metatranscriptomic analysis revealed that the Ehrlich pathway is the metabolic path of 2-phenylethanol in Pichia and identified potential antifungal mechanisms, including protein synthesis and DNA damage. This study demonstrated the role of volatile compound-mediated microbial interaction in microbiome assembly and discovered a plausible scenario in which Pichia antagonized fungal blooms. The results may improve the niche establishment and growth of the functional yeast that enhances the flavor of baijiu.IMPORTANCE Fermentation of food occurs within communities of interacting species. The importance of microbial interactions in shaping microbial structure and metabolic performance to optimize the traditional fermentation process has long been emphasized, but the interaction mechanisms remain unclear. This study applied metabolome analysis and amplicon sequencing along with metatranscriptomic analysis to examine the volatile organic compound-mediated antifungal activity of Pichia and its effect on the metabolism of ethanol during baijiu fermentation, potentially enhancing the establishment of the fermentation niche and improving ethanol metabolism.
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