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Barros KO, Alvarenga FBM, Magni G, Souza GFL, Abegg MA, Palladino F, da Silva SS, Rodrigues RCLB, Sato TK, Hittinger CT, Rosa CA. The Brazilian Amazonian rainforest harbors a high diversity of yeasts associated with rotting wood, including many candidates for new yeast species. Yeast 2023; 40:84-101. [PMID: 36582015 DOI: 10.1002/yea.3837] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 12/20/2022] [Accepted: 12/27/2022] [Indexed: 12/31/2022] Open
Abstract
This study investigated the diversity of yeast species associated with rotting wood in Brazilian Amazonian rainforests. A total of 569 yeast strains were isolated from rotting wood samples collected in three Amazonian areas (Universidade Federal do Amazonas-Universidade Federal do Amazonas [UFAM], Piquiá, and Carú) in the municipality of Itacoatiara, Amazon state. The samples were cultured in yeast nitrogen base (YNB)-d-xylose, YNB-xylan, and sugarcane bagasse and corncob hemicellulosic hydrolysates (undiluted and diluted 1:2 and 1:5). Sugiyamaella was the most prevalent genus identified in this work, followed by Kazachstania. The most frequently isolated yeast species were Schwanniomyces polymorphus, Scheffersomyces amazonensis, and Wickerhamomyces sp., respectively. The alpha diversity analyses showed that the dryland forest of UFAM was the most diverse area, while the floodplain forest of Carú was the least. Additionally, the difference in diversity between UFAM and Carú was the highest among the comparisons. Thirty candidates for new yeast species were obtained, representing 36% of the species identified and totaling 101 isolates. Among them were species belonging to the clades Spathaspora, Scheffersomyces, and Sugiyamaella, which are recognized as genera with natural xylose-fermenting yeasts that are often studied for biotechnological and ecological purposes. The results of this work showed that rotting wood collected from the Amazonian rainforest is a tremendous source of diverse yeasts, including candidates for new species.
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Affiliation(s)
- Katharina O Barros
- Departmento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,DOE Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, USA.,Laboratory of Genetics, J. F. Crow Institute for the Study of Evolution, Wisconsin Energy Institute, Center for Genomic Science Innovation, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Flávia B M Alvarenga
- Departmento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Giulia Magni
- Departmento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Gisele F L Souza
- Departmento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Maxwel A Abegg
- Institute of Exact Sciences and Technology (ICET), Federal University of Amazonas (UFAM), Itacoatiara, Brazil
| | - Fernanda Palladino
- Departmento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Sílvio S da Silva
- Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Lorena, Brazil
| | - Rita C L B Rodrigues
- Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Lorena, Brazil
| | - Trey K Sato
- DOE Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Chris Todd Hittinger
- DOE Great Lakes Bioenergy Research Center, University of Wisconsin-Madison, Madison, Wisconsin, USA.,Laboratory of Genetics, J. F. Crow Institute for the Study of Evolution, Wisconsin Energy Institute, Center for Genomic Science Innovation, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Carlos A Rosa
- Departmento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Chang CF, Liu YR, Naumov GI, Naumova ES, Lee CF. Taxonomy of the yeast genus Vanderwaltozyma and proposal of Vanderwaltozyma meishanica sp. nov., Vanderwaltozyma huisunica sp. nov., and Vanderwaltozyma molinica sp. nov. Antonie van Leeuwenhoek 2020; 113:663-676. [PMID: 31897851 DOI: 10.1007/s10482-019-01376-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 12/10/2019] [Indexed: 11/30/2022]
Abstract
Using electrophoretic karyotyping, RAPD fingerprinting and phylogenetic analysis of ribosomal RNA gene sequences, twenty-six Vanderwaltozyma strains were studied. Out of 19 strains isolated in mountainous areas of Taiwan, eighteen strains were isolated from soil and one strain was isolated from the fruiting body of mushroom, six were identified as V. polyspora and three as V. verrucispora. Based on the results of a multigene sequence analysis (D1/D2, ITS and mitochondrial COX II gene) and DNA-DNA reassociation, three new ascosporic members of the genus Vanderwaltozyma are formally described: V. huisunica sp. nov. (GA1S06T = CBS 12250T = BCRC 23260T), V. meishanica sp. nov. (EN4S02T = CBS 12249T = BCRC 23255T) and V. molinica sp. nov. (GJ8S05T = CBS 12251T = BCRC 23264T), and the holotypes of these novel species are assigned as BCRC 23260T, BCRC 23255T and BCRC 23264T, respectively.
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Affiliation(s)
- Chin-Feng Chang
- Department of Biological Science and Technology, China University of Science and Technology, Taipei, 11581, Taiwan
| | - Yi-Ru Liu
- Department of Applied Science, National Tsing Hua University, Nanda Campus, 521 Nanda Road, Hsinchu, 30014, Taiwan
| | - Gennadi I Naumov
- State Research Institute of Genetics and Selection of Industrial Microorganisms of National Research Centre, Kurchatov Institute, Moscow, Russia
| | - Elena S Naumova
- State Research Institute of Genetics and Selection of Industrial Microorganisms of National Research Centre, Kurchatov Institute, Moscow, Russia
| | - Ching-Fu Lee
- Department of Applied Science, National Tsing Hua University, Nanda Campus, 521 Nanda Road, Hsinchu, 30014, Taiwan.
- Institute of Analytical and Environmental Sciences, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu, 30013, Taiwan.
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Carbonetto B, Ramsayer J, Nidelet T, Legrand J, Sicard D. Bakery yeasts, a new model for studies in ecology and evolution. Yeast 2018; 35:591-603. [DOI: 10.1002/yea.3350] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 05/07/2018] [Accepted: 05/07/2018] [Indexed: 12/18/2022] Open
Affiliation(s)
- Belén Carbonetto
- SPO, Univ Montpellier, INRA; Montpellier SupAgro; Montpellier France
- Instituto Gulbenkian de Ciência; Bioinformatics and Computational Biology Unit; Oeiras Portugal
| | - Johan Ramsayer
- SPO, Univ Montpellier, INRA; Montpellier SupAgro; Montpellier France
| | - Thibault Nidelet
- SPO, Univ Montpellier, INRA; Montpellier SupAgro; Montpellier France
| | - Judith Legrand
- GQE-Le Moulon, INRA, Univ. Paris-Sud, CNRS, AgroParisTech; Université Paris-Saclay; Gif-sur-Yvette France
| | - Delphine Sicard
- SPO, Univ Montpellier, INRA; Montpellier SupAgro; Montpellier France
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Szabóová D, Hapala I, Sulo P. The complete mitochondrial DNA sequence from Kazachstania sinensis reveals a general +1C frameshift mechanism in CTGY codons. FEMS Yeast Res 2018. [PMID: 29528462 DOI: 10.1093/femsyr/foy028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The complete mitochondrial DNA (mtDNA) sequence from Kazachstania sinensis was analysed and compared to mtDNA from related yeasts. It contained the same set of genes; however, it only contained 23 tRNAs, as the trnR2 gene was absent. Most of the 12 introns within cox1, cob and rnl genes were inserted in the same sites as in other yeasts; however, two introns in rnl were in unusual positions. Traits such as gene order and GC cluster number were more related to Saccharomyces than to the other Kazachstania or linked clades. The most exceptional feature was the +1 frameshift in cox3, atp6 and cob open reading frames that was also found in other Kazachstania, Nakaseomyces delphensis and Candida glabrata. Comparison of DNA and protein sequences revealed the universal sites of +1C frameshifts were either CTGT or CTGC sequences. Moreover, an A→G substitution was found at position 37 in the anticodon stem loop tRNA gene for cysteine in all species with frameshifts but not in other sibling yeasts. This substitution allowed strong Watson-Crick base-pairing between an unmodified G (ACG) and the skipped C in the CTGY, leading to this quadruplet being read as cysteine.
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Affiliation(s)
- Dana Szabóová
- Department of Biochemistry, Comenius University, Faculty of Natural Sciences, Ilkovicova ulica 6, Bratislava 84215, Slovakia
| | - Ivan Hapala
- Institute of Animal Biochemistry and Genetics, Centre of Biosciences SAS, Dúbravská 9, Bratislava 840 05, Slovakia
| | - Pavol Sulo
- Department of Biochemistry, Comenius University, Faculty of Natural Sciences, Ilkovicova ulica 6, Bratislava 84215, Slovakia
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Jacques N, Sarilar V, Urien C, Lopes MR, Morais CG, Uetanabaro APT, Tinsley CR, Rosa CA, Sicard D, Casaregola S. Three novel ascomycetous yeast species of the Kazachstania clade, Kazachstania saulgeensis sp. nov., Kazachstania
serrabonitensis sp. nov. and Kazachstania australis sp. nov. Reassignment of Candida humilis to Kazachstania humilis f.a. comb. nov. and Candida pseudohumilis to Kazachstania pseudohumilis f.a. comb. nov. Int J Syst Evol Microbiol 2016; 66:5192-5200. [DOI: 10.1099/ijsem.0.001495] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Noémie Jacques
- Micalis Institute, INRA, AgroParisTech, CIRM-Levures, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Véronique Sarilar
- Micalis Institute, INRA, AgroParisTech, CIRM-Levures, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Charlotte Urien
- Génétique Quantitative et Evolution-Le Moulon, INRA, Université Paris-Sud, CNRS, AgroParisTech, Université Paris-Saclay, 91190 Gif-sur-Yvette, France
| | - Mariana R. Lopes
- Departamento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Camila G. Morais
- Departamento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Ana Paula T. Uetanabaro
- Departamento de Ciências Biológicas e Agroindústria, Universidade Estadual Santa Cruz, Ilhéus, BA 45662-900, Brazil
| | - Colin R. Tinsley
- Micalis Institute, INRA, AgroParisTech, CIRM-Levures, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Carlos A. Rosa
- Departamento de Microbiologia, ICB, C.P. 486, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Delphine Sicard
- Sciences pour l’œnologie, INRA, Supagro, 34060 Montpellier, France
| | - Serge Casaregola
- Micalis Institute, INRA, AgroParisTech, CIRM-Levures, Université Paris-Saclay, 78350 Jouy-en-Josas, France
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6
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Spoilage of vacuum-packed beef by the yeast Kazachstania psychrophila. Food Microbiol 2016; 53:15-23. [DOI: 10.1016/j.fm.2015.07.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Revised: 07/27/2015] [Accepted: 07/28/2015] [Indexed: 11/18/2022]
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James SA, Carvajal Barriga EJ, Portero Barahona P, Nueno-Palop C, Cross K, Bond CJ, Roberts IN. Kazachstania yasuniensis sp. nov., an ascomycetous yeast species found in mainland Ecuador and on the Galápagos. Int J Syst Evol Microbiol 2015; 65:1304-1309. [DOI: 10.1099/ijs.0.000102] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Seven strains representing a novel yeast species belonging to the genus Kazachstania were found at several collection sites on both mainland Ecuador (Yasuní National Park) and the Galápagos (Santa Cruz Island). Two strains (CLQCA 20-132T and CLQCA 24SC-045) were isolated from rotten wood samples, two further strains (CLQCA 20-280 and CLQCA 20-348) were isolated from soil samples, and three strains (CLQCA 20-198, CLQCA 20-374 and CLQCA 20-431) were isolated from decaying fruits. Sequence analyses of the D1/D2 domains of the LSU rRNA gene and ribosomal internal transcribed spacer (ITS) region indicated that the novel species is most closely related to Kazachstania servazzii and Kazachstania unispora. Although the strains could not be distinguished from one another based upon their differing geographical origins, they could be differentiated according to their isolation source (fruit, soil or wood) by ITS sequencing. The species name Kazachstania yasuniensis sp. nov. is proposed to accommodate these strains, with CLQCA 20-132T ( = CBS 13946T = NCYC 4008T) designated the type strain.
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Affiliation(s)
- Stephen A. James
- National Collection of Yeast Cultures (NCYC), Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, UK
| | - Enrique Javier Carvajal Barriga
- Colección de Levaduras Quito Católica (CLQCA), Centro Neotropical para Investigación de la Biomasa, Pontificia Universidad Católica del Ecuador, Escuela de Ciencias Biológicas, Quito, Ecuador
| | - Patricia Portero Barahona
- Colección de Levaduras Quito Católica (CLQCA), Centro Neotropical para Investigación de la Biomasa, Pontificia Universidad Católica del Ecuador, Escuela de Ciencias Biológicas, Quito, Ecuador
| | - Carmen Nueno-Palop
- National Collection of Yeast Cultures (NCYC), Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, UK
| | - Kathryn Cross
- Imaging and Microscopy Group (IMG), Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, UK
| | - Christopher J. Bond
- National Collection of Yeast Cultures (NCYC), Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, UK
| | - Ian N. Roberts
- National Collection of Yeast Cultures (NCYC), Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, UK
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8
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Kazachstania psychrophila sp. nov., a novel psychrophilic yeast isolated from vacuum-packed beef. Antonie van Leeuwenhoek 2013; 104:925-31. [DOI: 10.1007/s10482-013-0011-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Accepted: 08/19/2013] [Indexed: 11/27/2022]
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9
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Yang YL, Lin CC, Chang TP, Lauderdale TL, Chen HT, Lee CF, Hsieh CW, Chen PC, Lo HJ. Comparison of human and soil Candida tropicalis isolates with reduced susceptibility to fluconazole. PLoS One 2012; 7:e34609. [PMID: 22496832 PMCID: PMC3320620 DOI: 10.1371/journal.pone.0034609] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2011] [Accepted: 03/06/2012] [Indexed: 01/19/2023] Open
Abstract
Infections caused by treatment-resistant non-albicans Candida species, such as C. tropicalis, has increased, which is an emerging challenge in the management of fungal infections. Genetically related diploid sequence type (DST) strains of C. tropicalis exhibiting reduced susceptibility to fluconazole circulated widely in Taiwan. To identify the potential source of these wildly distributed DST strains, we investigated the possibility of the presence in soil of such C. tropicalis strains by pulsed field gel electrophoresis (PFGE) and DST typing methods. A total of 56 C. tropicalis isolates were recovered from 26 out of 477 soil samples. Among the 18 isolates with reduced susceptibility to fluconazole, 9 belonged to DST149 and 3 belonged to DST140. Both DSTs have been recovered from our previous studies on clinical isolates from the Taiwan Surveillance of Antimicrobial Resistance of Yeasts (TSARY) program. Furthermore, these isolates were more resistant to agricultural azoles. We have found genetically related C. tropicalis exhibiting reduced susceptibility to fluconazole from the human hosts and environmental samples. Therefore, to prevent patients from acquiring C. tropicalis with reduced susceptibility to azoles, prudent use of azoles in both clinical and agricultural settings is advocated.
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Affiliation(s)
- Yun-Liang Yang
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan
- Institute of Molecular Medicine and Bioengineering, National Chiao Tung University, Hsinchu, Taiwan
| | - Chih-Chao Lin
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli, Taiwan
| | - Te-Pin Chang
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli, Taiwan
| | - Tsai-Ling Lauderdale
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli, Taiwan
| | - Hui-Ting Chen
- Institute of Molecular Medicine and Bioengineering, National Chiao Tung University, Hsinchu, Taiwan
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli, Taiwan
| | - Ching-Fu Lee
- Department of Applied Science, National Hsinchu University of Education, Hsinchu, Taiwan
| | - Chih-Wen Hsieh
- Department of Applied Science, National Hsinchu University of Education, Hsinchu, Taiwan
| | - Pei-Chen Chen
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli, Taiwan
| | - Hsiu-Jung Lo
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli, Taiwan
- School of Dentistry, China of Medical University, Taichung, Taiwan
- * E-mail:
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Cardinali G, Antonielli L, Corte L, Roscini L, Bagnetti A, Pelliccia C, Puddu G. Kazachstania ichnusensis sp. nov., a diploid homothallic ascomycetous yeast from Sardinian lentisk rhizosphere. Int J Syst Evol Microbiol 2012; 62:722-727. [DOI: 10.1099/ijs.0.032243-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
During an investigation of yeast biota in the rhizosphere of lentisk in Sardinian semi-arid areas, a strain was isolated that could not be assigned to any known species. The sequence of the D1/D2 domain of the large subunit rDNA gene revealed that the strain belonged to the genus Kazachstania and was phylogenetically related to a clade including Kazachstania aerobia, Kazachstania servazzii, Kazachstania solicola and Kazachstania unispora. The novel isolate differed from members of this clade in its ability to assimilate d-glucono-1,5-lactone and its very weak fermentation of glucose and sucrose; its assimilation profile was unique within the genus Kazachstania. Monosporal colonies were able to sporulate, indicating that the species is homothallic. It is proposed that the isolate represents a novel species, Kazachstania ichnusensis sp. nov., with LCF 1675T ( = CBS 11859T) as type strain.
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Affiliation(s)
- Gianluigi Cardinali
- Department of Applied Biology – Microbiology Division, Borgo 20 Giugno, 74, I – 06121 Perugia, Italy
| | - Livio Antonielli
- Department of Applied Biology – Microbiology Division, Borgo 20 Giugno, 74, I – 06121 Perugia, Italy
| | - Laura Corte
- Department of Applied Biology – Microbiology Division, Borgo 20 Giugno, 74, I – 06121 Perugia, Italy
| | - Luca Roscini
- Department of Applied Biology – Microbiology Division, Borgo 20 Giugno, 74, I – 06121 Perugia, Italy
| | - Ambra Bagnetti
- Department of Applied Biology – Microbiology Division, Borgo 20 Giugno, 74, I – 06121 Perugia, Italy
| | - Cristina Pelliccia
- Department of Applied Biology – Microbiology Division, Borgo 20 Giugno, 74, I – 06121 Perugia, Italy
| | - Gianfranco Puddu
- Department of Applied Biology – Microbiology Division, Borgo 20 Giugno, 74, I – 06121 Perugia, Italy
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11
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Suh SO, Zhou JJ. Kazachstania intestinalis sp. nov., an ascosporogenous yeast from the gut of passalid beetle Odontotaenius disjunctus. Antonie van Leeuwenhoek 2011; 100:109-15. [PMID: 21380505 DOI: 10.1007/s10482-011-9569-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2011] [Accepted: 02/19/2011] [Indexed: 11/28/2022]
Abstract
Three ascosporogenous yeast strains were isolated from the gut of the passalid beetle, Odontotaenius disjunctus, inhabiting on rotten oak trees. DNA sequence comparison and other taxonomic characteristics identified the strains as a novel species in the genus Kazachstania. The name Kazachstania intestinalis sp. nov. (type strain EH085(T) = ATCC MYA-4658(T) = CBS 11839(T)) is proposed for the strains. The yeast is homothallic, producing persistent asci with 1-4 spheroidal ascospores. Molecular phylogeny from ribosomal RNA gene sequences placed this novel species on the basal lineage of a clade including Kazachstania lodderae, Kazachstania exigua, Kazachstania martiniae, and other related Kazachstania spp., but none of those species was a close sister to K. intestinalis.
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Affiliation(s)
- Sung-Oui Suh
- Mycology and Botany Program, American Type Culture Collection, Manassas, VA 20110, USA.
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12
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Liu YR, Huang LY, Young SS, Chang CF, Lee CF. Asterotremella meifongana sp. nov. and Asterotremella nantouana sp. nov., two anamorphic basidiomycetous yeasts isolated from soil and mushrooms. Antonie van Leeuwenhoek 2010; 99:643-50. [PMID: 21140213 DOI: 10.1007/s10482-010-9537-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Accepted: 11/23/2010] [Indexed: 11/24/2022]
Abstract
Two novel yeast species, Asterotremella meifongana sp. nov. and Asterotremella nantouana sp. nov., belonging to Asterotremellaceae within the Trichosporonales, are proposed to accommodate five strains isolated from Taiwanese samples of soil and basidiocarps during 2006-2007. Sequence analysis of the D1/D2 domains of the large subunit rRNA gene revealed that the two species are phylogenetically closely related to species of the genus Asterotremella, which indicates that they are members of the genus. The two species can be further differentiated from other Asterotremella species based on their internal transcribed spacer sequences, as well as on a few physiological test responses. The type strains are A. meifongana SN4S04(T) (=CBS 11424(T) = BCRC 23196(T)) and A. nantouana SN5S06(T) (=CBS 10890(T) = BCRC 23135(T)).
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Affiliation(s)
- Yi-Ru Liu
- Department of Applied Science, National Hsinchu University of Education, 521 Nanda Road, Hsinchu 300, Taiwan
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13
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Gujjari P, Suh SO, Lee CF, Zhou JJ. Trichosporon xylopini sp. nov., a hemicellulose-degrading yeast isolated from the wood-inhabiting beetle Xylopinus saperdioides. Int J Syst Evol Microbiol 2010; 61:2538-2542. [PMID: 21037034 DOI: 10.1099/ijs.0.028860-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Four arthroconidium-producing yeasts were isolated from the gut of wood-inhabiting tenebrionid and passalid beetles. The rRNA genes of these yeast strains were sequenced, compared and analysed. The sequence results and other taxonomic characterizations placed two of the strains into Trichosporon porosum, and the remaining strains, EH024(T) and EH026 which were isolated from Xylopinus saperdioides (Coleoptera: Tenebrionidae), into a novel species of the genus Trichosporon in the Porosum clade. Strain EN6S23 was independently isolated from forest soil in Taiwan and was identified as the same novel species based on identical sequences in the internal transcribed spacers (ITS) and the D1/D2 region of the LSU rRNA gene and similar physiological characteristics to those of strains EH024(T) and EH026. The three strains can assimilate cellulose and xylan as sole carbon source, and are clearly distinguished from their closest taxon, T. porosum, by 14 nt differences in the ITS and D1/D2 region. These strains did not reproduce sexually under the laboratory conditions tested. The novel species is proposed as Trichosporon xylopini sp. nov. (type strain EH024(T) = ATCC MYA-4670(T) = CBS 11841(T)).
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Affiliation(s)
- Pushpa Gujjari
- Mycology and Botany Program, American Type Culture Collection (ATCC), 10801 University Blvd, Manassas, VA 20110, USA
| | - Sung-Oui Suh
- Mycology and Botany Program, American Type Culture Collection (ATCC), 10801 University Blvd, Manassas, VA 20110, USA
| | - Ching-Fu Lee
- Department of Applied Science, National Hsinchu University of Education, 521 Nanda Road, Hsinchu 30014, Taiwan
| | - Jianlong J Zhou
- Mycology and Botany Program, American Type Culture Collection (ATCC), 10801 University Blvd, Manassas, VA 20110, USA
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Chang CF, Yao CH, Young SS, Limtong S, Kaewwichian R, Srisuk N, Lee CF. Candida gosingica sp. nov., an anamorphic ascomycetous yeast closely related to Scheffersomyces spartinae. Int J Syst Evol Microbiol 2010; 61:690-694. [PMID: 20382788 DOI: 10.1099/ijs.0.020511-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
During surveys on yeast diversity in forest soils from Taiwan and Thailand, ten yeast strains isolated from different samples were found to have similar molecular and physiological characteristics. Sequence analysis of small subunit (SSU) rDNA, the D1/D2 domain of large subunit (LSU) rDNA and internal transcribed spacer (ITS)-5.8S rDNA demonstrated that these strains were closely related to Scheffersomyces spartinae. The novel strains could be differentiated from S. spartinae by a 0.9 % sequence divergence (5 substitutions, 0 gaps) in the D1/D2 domain of LSU rDNA, a 1.5 % divergence (8 substitutions, 0 gaps) in the ITS-5.8S rDNA and a 0.7 % divergence (12 substitutions, 2 gaps) in the SSU rDNA. The novel strains also showed specific patterns of electrophoretic karyotypes that differed from that of S. spartinae. Therefore, a novel yeast species, Candida gosingica sp. nov., is proposed to accommodate these strains. The type strain SJ7S11(T) (=BCRC 23194(T)=CBS 11433(T)) was assigned and deposited in the Bioresource Collection and Research Center (BCRC), Food Industry Development and Research Institute, Hsinchu, Taiwan, and Centraalbureau voor Schimmelcultures (CBS), Utrecht, The Netherlands.
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Affiliation(s)
- Chin-Feng Chang
- Department of Applied Science, National Hsinchu University of Education, 521 Nanda Rd, Hsinchu 30014, Taiwan
| | - Cheng-Hsu Yao
- Department of Applied Science, National Hsinchu University of Education, 521 Nanda Rd, Hsinchu 30014, Taiwan
| | - Shuh-Sen Young
- Department of Applied Science, National Hsinchu University of Education, 521 Nanda Rd, Hsinchu 30014, Taiwan
| | - Savitree Limtong
- Department of Microbiology, Kasetsart University, Bangkok 10900, Thailand
| | | | - Nantana Srisuk
- Department of Microbiology, Kasetsart University, Bangkok 10900, Thailand
| | - Ching-Fu Lee
- Department of Applied Science, National Hsinchu University of Education, 521 Nanda Rd, Hsinchu 30014, Taiwan
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Current awareness on yeast. Yeast 2009. [DOI: 10.1002/yea.1625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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