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Nardini M. An Overview of Bioactive Phenolic Molecules and Antioxidant Properties of Beer: Emerging Trends. Molecules 2023; 28:molecules28073221. [PMID: 37049984 PMCID: PMC10096009 DOI: 10.3390/molecules28073221] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 03/31/2023] [Accepted: 04/02/2023] [Indexed: 04/14/2023] Open
Abstract
Beer is one of the oldest and most common beverages worldwide. The phenolic contents and antioxidant properties of beer are crucial factors in evaluating its nutritional quality. Special beers brewed with the addition of adjuncts are gaining in consumer preference, in response to demands for healthy food and new gustatory and olfactory stimuli. Many studies recently dealt with functional beers brewed with the addition of adjuncts. This review focuses on bioactive molecules, particularly the composition of phenolic compounds, and the antioxidant activity of beer. The current knowledge concerning the effect of the addition of adjuncts in the form of fruit, vegetables, herbs, and natural foods on the polyphenol content, antioxidant properties, and phenolic profile of beer is reviewed, with an outline of the emerging trends in brewing processes. Future studies need to complete the identification and characterization of the bioactive molecules in beer, as well as studying their absorption and metabolic fate in humans.
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Affiliation(s)
- Mirella Nardini
- CREA, Research Centre for Food and Nutrition, Via Ardeatina 546, 00178 Rome, Italy
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C G DP, R V, N B, M TA. Influence of Pichia myanmarensis in fermentation to produce quinoa based non-alcoholic beer with enhanced antioxidant activity. J Cereal Sci 2022. [DOI: 10.1016/j.jcs.2021.103390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Nundaeng S, Suwannarach N, Limtong S, Khuna S, Kumla J, Lumyong S. An Updated Global Species Diversity and Phylogeny in the Genus Wickerhamomyces with Addition of Two New Species from Thailand. J Fungi (Basel) 2021; 7:957. [PMID: 34829244 PMCID: PMC8618796 DOI: 10.3390/jof7110957] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/07/2021] [Accepted: 11/08/2021] [Indexed: 12/15/2022] Open
Abstract
Ascomycetous yeast species in the genus Wickerhamomyces (Saccharomycetales, Wickerhamomycetaceae) are isolated from various habitats and distributed throughout the world. Prior to this study, 35 species had been validly published and accepted into this genus. Beneficially, Wickerhamomyces species have been used in a number of biotechnologically applications of environment, food, beverage industries, biofuel, medicine and agriculture. However, in some studies, Wickerhamomyces species have been identified as an opportunistic human pathogen. Through an overview of diversity, taxonomy and recently published literature, we have updated a brief review of Wickerhamomyces. Moreover, two new Wickerhamomyces species were isolated from the soil samples of Assam tea (Camellia sinensis var. assamica) that were collected from plantations in northern Thailand. Herein, we have identified these species as W. lannaensis and W. nanensis. The identification of these species was based on phenotypic (morphological, biochemical and physiological characteristics) and molecular analyses. Phylogenetic analyses of a combination of the internal transcribed spacer (ITS) region and the D1/D2 domains of the large subunit (LSU) of ribosomal DNA genes support that W. lannaensis and W. nanensis are distinct from other species within the genus Wickerhamomyces. A full description, illustrations and a phylogenetic tree showing the position of both new species have been provided. Accordingly, a new combination species, W. myanmarensis has been proposed based on the phylogenetic results. A new key for species identification is provided.
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Affiliation(s)
- Supakorn Nundaeng
- Master of Science Program in Applied Microbiology (International Program), Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; (N.S.); (S.K.)
| | - Nakarin Suwannarach
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; (N.S.); (S.K.)
- Research Center of Microbial Diversity and Sustainable Utilization, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Savitree Limtong
- Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand;
- Academy of Science, The Royal Society of Thailand, Bangkok 10300, Thailand
| | - Surapong Khuna
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; (N.S.); (S.K.)
- Research Center of Microbial Diversity and Sustainable Utilization, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Jaturong Kumla
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; (N.S.); (S.K.)
- Research Center of Microbial Diversity and Sustainable Utilization, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Saisamorn Lumyong
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; (N.S.); (S.K.)
- Research Center of Microbial Diversity and Sustainable Utilization, Chiang Mai University, Chiang Mai 50200, Thailand
- Academy of Science, The Royal Society of Thailand, Bangkok 10300, Thailand
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Chai CY, Huang LN, Cheng H, Liu WJ, Hui FL. Wickerhamomyces menglaensis f.a., sp. nov., a yeast species isolated from rotten wood. Int J Syst Evol Microbiol 2019; 69:1509-1514. [PMID: 30893031 DOI: 10.1099/ijsem.0.003350] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Five strains, NUNU 16637, NYNU 16645, NYNU 1673, NYNU 1680 and NYNU 1689, of a novel ascomycetous yeast were isolated from the Xishuangbanna tropical rainforest, Yunnan Province, PR China. The five strains shared identical sequences in both of the D1/D2 domains of the large subunit rRNA gene and the internal transcribed spacer (ITS) regions. Sequence analysis showed that they represent undescribed yeast species belonging to the genus Wickerhamomyces. They differed from their closest known species, Wickerhamomyces xylosivorus NBRC 111553T, by 3.4 % sequence divergence (14 substitutions and six gaps out of 584 bp) in the D1/D2 domains and by 9.6 % sequence divergence (28 substitutions and 24 gaps over 543 bp) in the ITS regions, respectively. The five strains of novel species reproduced asexually; no sexual reproduction could be found. In contrast to W. xylosivorus, the novel yeast species were able to assimilate l-arabinose, inulin, soluble starch, d-mannitol and citrate, and unable to assimilate trehalose, raffinose, 5-keto-d-gluconate, d-gluconate, ethanol, ethylamine and cadaverine. Growth was observed at 35 °C. The name Wickerhamomyces menglaensis f.a., sp. nov. is proposed to accommodate these strains, with NYNU 1673 as the holotype.
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Affiliation(s)
- Chun-Yue Chai
- School of Life Science and Technology, Nanyang Normal University, Nanyang 473061, PR China
| | - Lin-Na Huang
- School of Life Science and Technology, Nanyang Normal University, Nanyang 473061, PR China
| | - Han Cheng
- School of Life Science and Technology, Nanyang Normal University, Nanyang 473061, PR China
| | - Wen-Jing Liu
- School of Life Science and Technology, Nanyang Normal University, Nanyang 473061, PR China
| | - Feng-Li Hui
- School of Life Science and Technology, Nanyang Normal University, Nanyang 473061, PR China
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Arastehfar A, Bakhtiari M, Daneshnia F, Fang W, Sadati SK, Al-Hatmi AM, Groenewald M, Sharifi-Mehr H, Liao W, Pan W, Zomorodian K, Hagen F, Boekhout T. First fungemia case due to environmental yeast Wickerhamomyces myanmarensis: detection by multiplex qPCR and antifungal susceptibility. Future Microbiol 2019; 14:267-274. [PMID: 30859860 PMCID: PMC6482385 DOI: 10.2217/fmb-2018-0253] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AIM Presenting the first clinical case of Wickerhamomyces myanmarensis. PATIENTS & METHODS Yeast cells were isolated from blood and central venous catheter of a 5.5-year-old male subject. API 20C AUX, MALDI-TOF MS, ITS and LSU rDNA sequencing, and our qPCR assay were used for identification and the MIC values were determined by CLSI M27-A3. RESULTS ITS and LSU rDNA sequencing identified both isolates as W. myanmarensis, while API 20C AUX and MALDI-TOF MS did not identify them correctly. Our qPCR specifically distinguished W. myanmarensis from W. anomalus. Isolate obtained from blood showed a higher MIC value for fluconazole, voriconazole and posaconazole. CONCLUSION Utilization of reliable identification tools might reveal the genuine spectrum of opportunistic yeast species.
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Affiliation(s)
- Amir Arastehfar
- Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands
| | - Mina Bakhtiari
- Basic Sciences in Infectious Diseases Research Center, & Department of Medical Mycology & Parasitology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Farnaz Daneshnia
- Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands
| | - Wenjie Fang
- Department of Dermatology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, China.,Shanghai Key Laboratory of Molecular Medical Mycology, Shanghai Institute of Medical Mycology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Sara Khanjari Sadati
- Basic Sciences in Infectious Diseases Research Center, & Department of Medical Mycology & Parasitology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Abdullah Ms Al-Hatmi
- Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands.,Ministry of Health, Directorate General of Health Services, Ibri, Oman
| | | | - Hamid Sharifi-Mehr
- Biology Department, Faculty of Science, Sahid Bahonar University of Kerman, Kerman, Iran
| | - Wanqing Liao
- Department of Dermatology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, China.,Shanghai Key Laboratory of Molecular Medical Mycology, Shanghai Institute of Medical Mycology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Weihua Pan
- Department of Dermatology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, China.,Shanghai Key Laboratory of Molecular Medical Mycology, Shanghai Institute of Medical Mycology, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Kamiar Zomorodian
- Basic Sciences in Infectious Diseases Research Center, & Department of Medical Mycology & Parasitology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ferry Hagen
- Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands
| | - Teun Boekhout
- Westerdijk Fungal Biodiversity Institute, Utrecht, The Netherlands.,Basic Sciences in Infectious Diseases Research Center, & Department of Medical Mycology & Parasitology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran.,Institute of Biodiversity & Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands
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Agustini BC, da Silva GA, Bonfim TMB. MALDI-TOF MS Supplementary database for species identification employing the yeast diversity encountered on southern Brazil grapes. Folia Microbiol (Praha) 2018; 63:685-693. [PMID: 29752627 DOI: 10.1007/s12223-018-0607-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 04/25/2018] [Indexed: 10/16/2022]
Abstract
The study of grape microflora is of interest when autochthonous yeasts, which are related to typical wine characteristics, are intended to be used in winemaking. The election of matrix-assisted laser desorption-ionization time-of-flight mass spectrometry (MALDI-TOF MS) as the first method for yeast identification was based on its accuracy and rapidity compared to alternative laboratory protocols for identification. The aims of this study are to consolidate the MALDI-TOF MS Supplementary database for environmental yeasts already constructed, to expand it through the addition of standard spectra of not included yeast species, and to discuss the grape microflora encountered in Southern Brazil. A total of 358 strains, isolated from grape berries, were submitted to protein profiling employing Biotyper and Supplementary database. Molecular biology techniques were used as alternatives to identify 6.4% of strains not promptly designated by protein profiling. These strains corresponded to the species Candida californica, Zygoascus meyerae, Candida akabanensis, Candida azyma, and Hanseniaspora vineae. The MALDI-TOF MS spectra of the identified species were added to Supplementary database. The presented results strengthen the need for further expansion of the mass spectra database to broaden its microbiological application.
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Affiliation(s)
- Bruna Carla Agustini
- Laboratory of Applied Microbiology, Embrapa Grape and Wine, Bento Gonçalves, RS, Brazil.
| | | | - Tania Maria Bordin Bonfim
- Laboratory of Enzymology and Fermentation Technology, Pharmacy Department, Federal University of Paraná, Curitiba, PR, Brazil
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Kobayashi R, Kanti A, Kawasaki H. Three novel species of d-xylose-assimilating yeasts, Barnettozyma xylosiphila sp. nov., Barnettozyma xylosica sp. nov. and Wickerhamomyces xylosivorus f.a., sp. nov. Int J Syst Evol Microbiol 2017; 67:3971-3976. [PMID: 28895520 DOI: 10.1099/ijsem.0.002233] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
This study describes three novel xylose-assimilating yeasts, which were isolated from decayed wood collected from Bung Hatta Botanical Garden in West Sumatra and Cibodas Botanic Garden in West Java, or from litter from Eka Karya Bali Botanic Garden in Bali, Indonesia. Phylogenetic analysis was performed based on the sequences of the D1/D2 domains of the large ribosomal subunit (LSU), the small ribosomal subunit (SSU), the internal transcribed spacer (ITS) and elongation factor-1α (EF-1α), and the three strains were found to represent three novel species belonging to genera Barnettozyma or Wickerhamomyces. The morphological, biochemical and physiological characteristics indicated that the strains were distinct from other closely related species. Strains 13Y206T and 14Y196T belonging to the Barnettozyma clade are described as the type strains of Barnettozyma xylosiphila sp. nov. (type strain 13Y206T=NBRC 110202T=InaCC Y726T; MycoBank MB808598) and Barnettozyma xylosica sp. nov. (type strain 14Y196T=NBRC 111558T=InaCC Y1030T; MycoBank MB819485). Strain 14Y125T belonging to the Wickerhamomyces clade is described as the type strain of Wickerhamomyces xylosivorus f.a., sp. nov. (type strain 14Y125T=NBRC 111553T=InaCC Y1026T; MycoBank MB819484).
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Affiliation(s)
- Ryuichi Kobayashi
- Biological Resource Center, National Institute of Technology and Evaluation (NBRC), Chiba, Japan
| | - Atit Kanti
- Division of Microbiology, Research Center for Biology, Indonesian Institute of Sciences (LIPI), Cibinong, Indonesia
| | - Hiroko Kawasaki
- Biological Resource Center, National Institute of Technology and Evaluation (NBRC), Chiba, Japan
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8
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Agustini BC, Silva LP, Bloch C, Bonfim TMB, da Silva GA. Evaluation of MALDI-TOF mass spectrometry for identification of environmental yeasts and development of supplementary database. Appl Microbiol Biotechnol 2014; 98:5645-54. [PMID: 24687751 DOI: 10.1007/s00253-014-5686-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Revised: 03/08/2014] [Accepted: 03/11/2014] [Indexed: 11/29/2022]
Abstract
Yeast identification using traditional methods which employ morphological, physiological, and biochemical characteristics can be considered a hard task as it requires experienced microbiologists and a rigorous control in culture conditions that could implicate in different outcomes. Considering clinical or industrial applications, the fast and accurate identification of microorganisms is a crescent demand. Hence, molecular biology approaches has been extensively used and, more recently, protein profiling using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) has proved to be an even more efficient tool for taxonomic purposes. Nonetheless, concerning to mass spectrometry, data available for the differentiation of yeast species for industrial purpose is limited and reference databases commercially available comprise almost exclusively clinical microorganisms. In this context, studies focusing on environmental isolates are required to extend the existing databases. The development of a supplementary database and the assessment of a commercial database for taxonomic identifications of environmental yeast are the aims of this study. We challenge MALDI-TOF MS to create protein profiles for 845 yeast strains isolated from grape must and 67.7 % of the strains were successfully identified according to previously available manufacturer database. The remaining 32.3 % strains were not identified due to the absence of a reference spectrum. After matching the correct taxon for these strains by using molecular biology approaches, the spectra concerning the missing species were added in a supplementary database. This new library was able to accurately predict unidentified species at first instance by MALDI-TOF MS, proving it is a powerful tool for the identification of environmental yeasts.
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Affiliation(s)
- Bruna Carla Agustini
- Laboratório de Microbiologia Aplicada, EMBRAPA Uva e Vinho, Bento Gonçalves, RS, Brazil
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9
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Huang CH, Chang MT, Huang L. Species identification of Wickerhamomyces anomalus and related taxa using β-tubulin (β-tub) DNA barcode marker. Yeast 2012; 29:531-5. [PMID: 23172674 DOI: 10.1002/yea.2933] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Accepted: 10/08/2012] [Indexed: 01/14/2023] Open
Abstract
Wickerhamomyces anomalus is used in food and feed processing, although the species has been reported as an opportunistic human pathogen, predominantly in neonates. Neither phenotypic nor the most frequently applied genotypic marker (D1/D2 LSU ribosomal DNA) provide sufficient resolution for accurate identification of this yeast. In this study, the β-tubulin gene was used for species identification by direct DNA sequencing and as marker in a species-specific PCR assay. The results showed that all examined W. anomalus strains were clearly distinguished from the closely related species by comparative sequence analysis of the β-tubulin gene. In addition, the species-specific primers were also developed based on the β-tubulin gene, which was employed for polymerase chain reaction with the template DNA of Wickerhamomyces strains. A single 218 bp species-specific band was found only in W. anomalus. Our data indicate that the phylogenetic relationships between these strains are easily resolved by sequencing of the β-tubulin gene and combined with species-specific PCR assay.
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Affiliation(s)
- Chien-Hsun Huang
- Bioresource Collection and Research Centre, Food Industry Research and Development Institute, Hsinchu, Taiwan, Republic of China.
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Cheng H, Wang H, Lv J, Jiang M, Lin S, Deng Z. A novel method to prepare L-arabinose from xylose mother liquor by yeast-mediated biopurification. Microb Cell Fact 2011; 10:43. [PMID: 21649890 PMCID: PMC3125199 DOI: 10.1186/1475-2859-10-43] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2011] [Accepted: 06/07/2011] [Indexed: 12/04/2022] Open
Abstract
Background L-arabinose is an important intermediate for anti-virus drug synthesis and has also been used in food additives for diets-controlling in recent years. Commercial production of L-arabinose is a complex progress consisting of acid hydrolysis of gum arabic, followed by multiple procedures of purification, thus making high production cost. Therefore, there is a biotechnological and commercial interest in the development of new cost-effective and high-performance methods for obtaining high purity grade L-arabinose. Results An alternative, economical method for purifying L-arabinose from xylose mother liquor was developed in this study. After screening 306 yeast strains, a strain of Pichia anomala Y161 was selected as it could effectively metabolize other sugars but not L-arabinose. Fermentation in a medium containing xylose mother liquor permitted enrichment of L-arabinose by a significant depletion of other sugars. Biochemical analysis of this yeast strain confirmed that its poor capacity for utilizing L-arabinose was due to low activities of the enzymes required for the metabolism of this sugar. Response surface methodology was employed for optimization the fermentation conditions in shake flask cultures. The optimum conditions were: 75 h fermentation time, at 32.5°C, in a medium containing 21% (v/v) xylose mother liquor. Under these conditions, the highest purity of L-arabinose reached was 86.1% of total sugar, facilitating recovery of white crystalline L-arabinose from the fermentation medium by simple methods. Conclusion Yeast-mediated biopurification provides a dynamic method to prepare high purity of L-arabinose from the feedstock solution xylose mother liqour, with cost-effective and high-performance properties.
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Affiliation(s)
- Hairong Cheng
- Laboratory of Microbial Metabolism and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800# Dongchuan Road, Shanghai, China
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11
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Walker GM. Pichia anomala: cell physiology and biotechnology relative to other yeasts. Antonie Van Leeuwenhoek 2010; 99:25-34. [PMID: 20706871 DOI: 10.1007/s10482-010-9491-8] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2010] [Accepted: 07/30/2010] [Indexed: 11/26/2022]
Abstract
Pichia anomala is a most interesting yeast species, from a number of environmental, industrial and medical aspects. This yeast has been isolated from very diverse natural habitats (e.g. in foods, insects, wastewaters etc.) and it also exhibits wide metabolic and physiological diversity. Some of the activities of P. anomala, particularly its antimicrobial action, make it a very attractive organism for biological control applications in the agri-food sectors of industry. Being a 'robust' organism, it additionally has potential to be exploited in bioremediation of environmental pollutants. This paper provides an overview of cell physiological characteristics (growth, metabolism, stress responses) and biotechnological potential (e.g. as a novel biocontrol agent) of P. anomala and compares such properties with other yeast species, notably Saccharomyces cerevisiae, which remains the most exploited industrial microorganism. We await further basic knowledge of P. anomala cell physiology and genetics prior to its fuller commercial exploitation, but the exciting biotechnological potential of this yeast is highlighted in this paper.
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Affiliation(s)
- Graeme M Walker
- Yeast Research Group, School of Contemporary Sciences, University of Abertay Dundee, Bell Street, Dundee, DD1 1HG, Scotland, UK.
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Vrancken G, De Vuyst L, Van der Meulen R, Huys G, Vandamme P, Daniel HM. Yeast species composition differs between artisan bakery and spontaneous laboratory sourdoughs. FEMS Yeast Res 2010; 10:471-81. [PMID: 20384785 DOI: 10.1111/j.1567-1364.2010.00621.x] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Sourdough fermentations are characterized by the combined activity of lactic acid bacteria and yeasts. An investigation of the microbial composition of 21 artisan sourdoughs from 11 different Belgian bakeries yielded 127 yeast isolates. Also, 12 spontaneous 10-day laboratory sourdough fermentations with daily backslopping were performed with rye, wheat, and spelt flour, resulting in the isolation of 217 yeast colonies. The isolates were grouped according to PCR-fingerprints obtained with the primer M13. Representative isolates of each M13 fingerprint group were identified using the D1/D2 region of the large subunit rRNA gene, internal transcribed spacer sequences, and partial actin gene sequences, leading to the detection of six species. The dominant species in the bakery sourdoughs were Saccharomyces cerevisiae and Wickerhamomyces anomalus (formerly Pichia anomala), while the dominant species in the laboratory sourdough fermentations were W. anomalus and Candida glabrata. The presence of S. cerevisiae in the bakery sourdoughs might be due to contamination of the bakery environment with commercial bakers yeast, while the yeasts in the laboratory sourdoughs, which were carried out under aseptic conditions with flour as the only nonsterile component, could only have come from the flour used.
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Affiliation(s)
- Gino Vrancken
- Faculty of Sciences and Bio-engineering Sciences, Vrije Universiteit Brussel, Brussels, Belgium
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Current awareness on yeast. Yeast 2005; 22:1249-56. [PMID: 16320446 DOI: 10.1002/yea.1170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Nagatsuka Y, Kawasaki H, Mikata K, Seki T. Candida khmerensis sp. nov., a novel cation-tolerant yeast isolated from dry salted shrimp and sewage in Cambodia. J GEN APPL MICROBIOL 2005; 51:235-43. [PMID: 16205031 DOI: 10.2323/jgam.51.235] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Two cation-tolerant yeasts with powdered colonies, K28-3-2T and K26-1-4, were isolated from dry salted shrimp and sewage, respectively, in Siem Reap province, Cambodia. The D1/D2 sequences of the 26S rDNA data showed that the two isolates were conspecific and related to the Pichia burtonii and Candida fennica. Two isolates were examined by a polyphasic taxonomic approach, including molecular phylogenetic analysis, morphological, physiological and biochemical tests, DNA hybridization and MSP-PCR fingerprinting, in comparison with P. burtonii and C. fennica. The two isolates were found to grow by multilateral budding with true and pseudo-mycelium, to not produce ascospores, and to contain ubiquinone Q-8 similar to that of P. burtonii and C. fennica. The two isolates were not differentiated from the two closest species, P. burtonii and C. fennica, by the phenotypic character examined, except for the cation (Li+)-tolerance. From DNA-DNA reassociation studies, however, the two isolates showed low similarities to the closest two species. Based on D1/D2 sequences of 26S rDNA and DNA-DNA reassociation data, they were shown to be a new distinct species from P. burtonii and C. fennica. Therefore, a novel species is proposed, Candida khmerensis sp. nov., represented by strain K28-3-2T (=JCM 13262(T)=CBS 9784T). The novel species, Candida khmerensis sp. nov. can be clearly distinguished from P. burtonii and C. fennica by either the 26S rDNA D1/D2 or ITS region with 5.8S rDNA sequencing, or by the MSP-PCR fingerprinting pattern.
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Affiliation(s)
- Yuka Nagatsuka
- The International Center for Biotechnology, Osaka University, Suita, Japan
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