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Lan J, Liu T, Miao L, Pei T, Gan Z, Lin A, Geng H, Zhang P. New insights into endophytic fungi diversity and their potential correlation with polyphyllin levels of Paris polyphylla var. yunnanensis. Can J Microbiol 2023; 69:351-361. [PMID: 37436108 DOI: 10.1139/cjm-2023-0056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2023]
Abstract
Endophytes confer fitness advantages to host plants. However, the ecological communities of endophytic fungi in the different tissues (rhizomes, stems, and leaves) of Paris polyphylla and the relationship of their endophytic fungi with polyphyllin levels remain unclear. In this study, the community diversity and differences of endophytic fungi in the rhizomes, stems, and leaves of P. polyphylla var. yunnanensis were investigated, and a comprehensively diverse community of endophytic fungi was represented, including 50 genera, 44 families, 30 orders, 12 classes, and 5 phyla. Distributions of endophytic fungi differed greatly across the three tissues, with six genera common to all tissues, and 11, 5, and 4 genera specific to the rhizomes, stems, and leaves, respectively. Seven genera showed a significantly positive correlation to polyphyllin contents, indicating their potential roles in polyphyllin accumulation. This study provides valuable information for further research of the ecological and biological functions of endophytic fungi of P. polyphylla.
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Affiliation(s)
- Juan Lan
- College of Life Science, South-Central Minzu University, Wuhan 430074, China
| | - Ting Liu
- College of Life Science, South-Central Minzu University, Wuhan 430074, China
| | - Liyun Miao
- College of Basic Medical Sciences, Shanxi University of Traditional Chinese Medicine, Jinzhong 030619, China
| | - Ting Pei
- College of Life Science, South-Central Minzu University, Wuhan 430074, China
| | - Zhe Gan
- College of Life Science, South-Central Minzu University, Wuhan 430074, China
| | - Aihua Lin
- College of Life Science, South-Central Minzu University, Wuhan 430074, China
| | - Hong Geng
- College of Life Science, South-Central Minzu University, Wuhan 430074, China
| | - Peng Zhang
- College of Life Science, South-Central Minzu University, Wuhan 430074, China
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2
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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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Lin WR, Chang YP, Wu HL, Hsu IC, Wang PH. A symbiosis between Euploea butterflies and yeasts. Symbiosis 2022. [DOI: 10.1007/s13199-022-00886-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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4
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Cui P, Liu L, Huang Z, Shi S, Kong K, Zhang Y. Diversity, antibacterial activity and chemical analyses of gut-associated fungi isolated from the Crocothemis servilia. Front Microbiol 2022; 13:970990. [PMID: 36187943 PMCID: PMC9523248 DOI: 10.3389/fmicb.2022.970990] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 08/15/2022] [Indexed: 11/13/2022] Open
Abstract
Insect-associated fungi are a potentially rich source of novel natural products with antibacterial activity. Here, we investigated the community composition and phylogenetic diversity of gut-associated fungi of the dragonfly (Crocothemis Servilia) using a combination of culture-dependent and culture-independent methods. A total of 42 fungal isolates were obtained from the guts of the dragonfly, which belonged to four classes and thirteen different genera. Amplicon sequencing analyses revealed that the fungal communities were more diverse, and a total of 136 genera were identified and dominated by the genera Wojnowiciella and Phoma. The antibacterial bioassay showed that five fungal crude extracts of representative isolates have shown antibacterial activities. Among them, the extract of Phoma sp. QTH17 showed the best antibacterial activities against Escherichia coli, Micrococcus tetragenus, and Staphylococcus aureus with the disc diameter of inhibition zone diameter (IZD) of 6.50, 10.80, and 8.70 mm, respectively. Chemical analysis of Phoma sp. QTH17 led to the discovery of five known compounds, including ergosterol (1), 3-Chlorogentisyl alcohol (2), epoxydon (3), epoxydon 6-methylsalicylate ester (4) and mannitol (5). Among them, the compound 3 exhibited potent antibacterial activities against E. coli, M. tetragenus, and S. aureus with the IZD of 7.00, 14.00, and 12.50 mm, respectively, which were slightly weaker than those of the positive gentamicin sulfate with the IZD of 11.13, 18.30, and 12.13 mm, respectively. In conclusion, our results confirmed that the diversity of gut-associated fungi of C. Servilia could be expected to explore the resource of new species and antibacterial substances.
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Affiliation(s)
- Pu Cui
- School of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Lijun Liu
- School of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Zhongdi Huang
- School of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Shuping Shi
- School of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Kun Kong
- School of Life Sciences, Anhui Agricultural University, Hefei, China
| | - Yinglao Zhang
- School of Life Sciences, Anhui Agricultural University, Hefei, China
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, China
- *Correspondence: Yinglao Zhang,
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5
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Sohail M, Barzkar N, Michaud P, Tamadoni Jahromi S, Babich O, Sukhikh S, Das R, Nahavandi R. Cellulolytic and Xylanolytic Enzymes from Yeasts: Properties and Industrial Applications. Molecules 2022; 27:3783. [PMID: 35744909 PMCID: PMC9229053 DOI: 10.3390/molecules27123783] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 06/08/2022] [Accepted: 06/09/2022] [Indexed: 11/17/2022] Open
Abstract
Lignocellulose, the main component of plant cell walls, comprises polyaromatic lignin and fermentable materials, cellulose and hemicellulose. It is a plentiful and renewable feedstock for chemicals and energy. It can serve as a raw material for the production of various value-added products, including cellulase and xylanase. Cellulase is essentially required in lignocellulose-based biorefineries and is applied in many commercial processes. Likewise, xylanases are industrially important enzymes applied in papermaking and in the manufacture of prebiotics and pharmaceuticals. Owing to the widespread application of these enzymes, many prokaryotes and eukaryotes have been exploited to produce cellulase and xylanases in good yields, yet yeasts have rarely been explored for their plant-cell-wall-degrading activities. This review is focused on summarizing reports about cellulolytic and xylanolytic yeasts, their properties, and their biotechnological applications.
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Affiliation(s)
- Muhammad Sohail
- Department of Microbiology, University of Karachi, Karachi 75270, Pakistan;
| | - Noora Barzkar
- Department of Marine Biology, Faculty of Marine Science and Technology, University of Hormozgan, Bandar Abbas 3995, Iran
| | - Philippe Michaud
- Institute Pascal, Université Clermont Auvergne, CNRS, Clermont Auvergne INP, F-63000 Clermont-Ferrand, France;
| | - Saeid Tamadoni Jahromi
- Persian Gulf and Oman Sea Ecology Research Center, Iranian Fisheries Sciences Research Institute, Agricultural Research Education and Extension Organization (AREEO), Bandar Abbas 3995, Iran
| | - Olga Babich
- Institute of Living Systems, Immanuel Kant Baltic Federal University, 236016 Kaliningrad, Russia; (O.B.); (S.S.)
| | - Stanislav Sukhikh
- Institute of Living Systems, Immanuel Kant Baltic Federal University, 236016 Kaliningrad, Russia; (O.B.); (S.S.)
| | - Rakesh Das
- Department of Paraclinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Sciences (NMBU), 1433 Aas, Norway;
| | - Reza Nahavandi
- Animal Science Research Institute of Iran (ASRI), Agricultural Research, Education and Extension Organization (AREEO), Karaj 8361, Iran;
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6
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Tiwari S, Behera BC, Baghela A. Nakazawaea odontotermitis f.a., sp. nov., a novel yeast isolated from the gut of Odontotermes horni in India. Arch Microbiol 2022; 204:237. [PMID: 35366106 DOI: 10.1007/s00203-022-02841-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 03/10/2022] [Accepted: 03/13/2022] [Indexed: 11/28/2022]
Abstract
Three strains, SMT1.3, SMT1.10, and SMT2.2, representing a novel asexual ascomycetous yeast species, were isolated from the gut of a termite Odontotermes horni in Maharashtra, India. Phylogenetic analyses of the LSU, ITS, and SSU sequences revealed that they belonged to the genus Nakazawaea, with N. siamensis as the closest relative. The new species differed from the type strain of N. siamensis (DMKU-RK467T) by 11 substitutions in the D1/D2 region of the large subunit (LSU) rRNA gene and by 8 substitutions and one gap in the small subunit (SSU) rRNA gene. Notable biochemical and physiological differences were also observed between N. siamensis and the new species. Hence, the species Nakazawaea odontotermitis f.a., sp. nov. is proposed. The type strain is SMT1.3 T (MTCC 13,105 = NFCCI 5011 = PYCC 9153). GenBank accession numbers of the LSU, ITS and SSU sequences of Nakazawaea odontotermitis f.a., sp. nov. are MZ234240, MZ234239, and OK384663. The MycoBank number is MB 841926.
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Affiliation(s)
- Snigdha Tiwari
- Biodiversity and Palaeobiology Group, National Fungal Culture Collection of India (NFCCI), MACS-Agharkar Research Institute, G.G. Agarkar Road, Pune, 411004, India.,Savitribai Phule Pune University, Ganeshkhind, Pune, 411007, India
| | - Bhaskar C Behera
- Biodiversity and Palaeobiology Group (Lichens), MACS-Agharkar Research Institute, G.G. Agarkar Road, Pune, 411004, India
| | - Abhishek Baghela
- Biodiversity and Palaeobiology Group, National Fungal Culture Collection of India (NFCCI), MACS-Agharkar Research Institute, G.G. Agarkar Road, Pune, 411004, India. .,Savitribai Phule Pune University, Ganeshkhind, Pune, 411007, India.
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7
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Haelewaters D, Urbina H, Brown S, Newerth-Henson S, Aime MC. Isolation and Molecular Characterization of the Romaine Lettuce Phylloplane Mycobiome. J Fungi (Basel) 2021; 7:277. [PMID: 33917072 PMCID: PMC8067711 DOI: 10.3390/jof7040277] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 03/27/2021] [Accepted: 04/05/2021] [Indexed: 02/06/2023] Open
Abstract
Romaine lettuce (Lactuca sativa) is an important staple of American agriculture. Unlike many vegetables, romaine lettuce is typically consumed raw. Phylloplane microbes occur naturally on plant leaves; consumption of uncooked leaves includes consumption of phylloplane microbes. Despite this fact, the microbes that naturally occur on produce such as romaine lettuce are for the most part uncharacterized. In this study, we conducted culture-based studies of the fungal romaine lettuce phylloplane community from organic and conventionally grown samples. In addition to an enumeration of all such microbes, we define and provide a discussion of the genera that form the "core" romaine lettuce mycobiome, which represent 85.5% of all obtained isolates: Alternaria, Aureobasidium, Cladosporium, Filobasidium, Naganishia, Papiliotrema, Rhodotorula, Sampaiozyma, Sporobolomyces, Symmetrospora and Vishniacozyma. We highlight the need for additional mycological expertise in that 23% of species in these core genera appear to be new to science and resolve some taxonomic issues we encountered during our work with new combinations for Aureobasidiumbupleuri and Curvibasidium nothofagi. Finally, our work lays the ground for future studies that seek to understand the effect these communities may have on preventing or facilitating establishment of exogenous microbes, such as food spoilage microbes and plant or human pathogens.
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Affiliation(s)
- Danny Haelewaters
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907, USA; (H.U.); (S.B.); (S.N.-H.)
| | - Hector Urbina
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907, USA; (H.U.); (S.B.); (S.N.-H.)
- Division of Plant Industry, Florida Department of Agriculture and Consumer Services, Gainesville, FL 32608, USA
| | - Samuel Brown
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907, USA; (H.U.); (S.B.); (S.N.-H.)
| | - Shannon Newerth-Henson
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907, USA; (H.U.); (S.B.); (S.N.-H.)
| | - M. Catherine Aime
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907, USA; (H.U.); (S.B.); (S.N.-H.)
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8
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Shi CF, Zhang KH, Chai CY, Yan ZL, Hui FL. Diversity of the genus Sugiyamaella and description of two new species from rotting wood in China. MycoKeys 2021; 77:27-39. [PMID: 33519267 PMCID: PMC7815693 DOI: 10.3897/mycokeys.77.60077] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 12/24/2020] [Indexed: 11/12/2022] Open
Abstract
Species of the genus Sugiyamaella (Trichomonascaceae, Saccharomycetales), found in rotting wood in China, were investigated using morphology and the molecular phylogeny of a combined ITS and nrLSU dataset. Nine taxa were collected in China: two were new species (viz. Sugiyamaellachuxiongsp. nov. and S.yunanensissp. nov.) and seven were known species, S.americana, S.ayubii, S.novakii, S.paludigena, S.valenteae, S.valdiviana and S.xiaguanensis. The two new species are illustrated and their morphology and phylogenetic relationships with other Sugiyamaella species are discussed. Our results indicate a potentially great diversity of Sugiyamaella spp. inhabiting rotting wood in China just waiting to be discovered.
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Affiliation(s)
- Cheng-Feng Shi
- School of Life Science and Technology, Nanyang Normal University, Nanyang 473061, China Nanyang Normal University Nanyang China
| | - Kai-Hong Zhang
- School of Life Science and Technology, Nanyang Normal University, Nanyang 473061, China Nanyang Normal University Nanyang China
| | - Chun-Yue Chai
- School of Life Science and Technology, Nanyang Normal University, Nanyang 473061, China Nanyang Normal University Nanyang China
| | - Zhen-Li Yan
- State Key Laboratory of Motor Vehicle Biofuel Technology, Henan Tianguan Enterprise Group Co., Ltd., Nanyang 473000, China Henan Tianguan Enterprise Group Co., Ltd. Nanyang China
| | - Feng-Li Hui
- School of Life Science and Technology, Nanyang Normal University, Nanyang 473061, China Nanyang Normal University Nanyang China
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Tiwari S, Avchar R, Arora R, Lanjekar V, Dhakephalkar PK, Dagar SS, Baghela A. Xylanolytic and Ethanologenic Potential of Gut Associated Yeasts from Different Species of Termites from India. MYCOBIOLOGY 2020; 48:501-511. [PMID: 33312017 PMCID: PMC7717550 DOI: 10.1080/12298093.2020.1830742] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 09/10/2020] [Accepted: 09/28/2020] [Indexed: 06/12/2023]
Abstract
Xylophagous termites are capable of degrading lignocellulose by symbiotic gut microorganisms along with the host's indigenous enzymes. Therefore, the termite gut might be a potential niche to obtain natural yeasts with celluloytic, xylanolytic and ethanologenic traits required for bioethanol production from lignocellulosic biomass. In this study, we cultured 79 yeasts from three different termites viz. Coptotermes heimi, Odontotermes javanicus and Odontotermes obesus. After suitable screening methods, we identified 53 yeasts, which belonged to 10 genera and 16 different species of both ascomycetous and basidiomycetous yeasts. Most yeasts in the present study represent their first-ever isolation from the termite gut. Representative strains of identified yeasts were evaluated for their cellulolytic, xylanolytic, and ethanologenic abilities. None of the isolates showed cellulase activity; 22 showed xylanolytic activity, while six produced substantial quantities of ethanol. Among xylanolytic cultures, Pseudozyma hubeiensis STAG 1.7 and Hannaella pagnoccae STAG 1.14 produced 1.31 and 1.17 IU of xylanase. Among ethanologenic yeasts, the strains belonging to genera Candida and Kodamaea produced high amount of ethanol. Overall, highest ethanol level of 4.42 g/L was produced by Candida tropicalis TS32 using 1% glucose, which increased up to 22.92 g/L at 35 °C, pH 4.5 with 5% glucose. Fermentation of rice straw hydrolysate gave 8.95 g/l of ethanol with a yield of 0.42 g/g using the strain TS32. Our study highlights the gut of wood-feeding termites as a potential source of diverse yeasts that would be useful in the production of xylanase and bioethanol.
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Affiliation(s)
- Snigdha Tiwari
- National Fungal Culture Collection of India (NFCCI), Biodiversity and Palaeobiology Group, MACS-Agharkar Research Institute, Pune, India
- Savitribai Phule Pune University, Pune, India
| | - Rameshwar Avchar
- National Fungal Culture Collection of India (NFCCI), Biodiversity and Palaeobiology Group, MACS-Agharkar Research Institute, Pune, India
- Savitribai Phule Pune University, Pune, India
| | - Riya Arora
- Savitribai Phule Pune University, Pune, India
| | - Vikram Lanjekar
- Bioenergy Group, MACS-Agharkar Research Institute, Pune, India
- Savitribai Phule Pune University, Pune, India
| | - Prashant K. Dhakephalkar
- Bioenergy Group, MACS-Agharkar Research Institute, Pune, India
- Savitribai Phule Pune University, Pune, India
| | - Sumit S. Dagar
- Bioenergy Group, MACS-Agharkar Research Institute, Pune, India
- Savitribai Phule Pune University, Pune, India
| | - Abhishek Baghela
- National Fungal Culture Collection of India (NFCCI), Biodiversity and Palaeobiology Group, MACS-Agharkar Research Institute, Pune, India
- Savitribai Phule Pune University, Pune, India
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The digestive tract of Phylloicus (Trichoptera: Calamoceratidae) harbours different yeast taxa in Cerrado streams, Brazil. Symbiosis 2018. [DOI: 10.1007/s13199-018-0577-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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11
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Huang LN, Xi ZW, Li Y, Hui FL. Sugiyamaella xiaguanensis f.a., sp. nov., a yeast species isolated from rotting wood. Int J Syst Evol Microbiol 2018; 68:3307-3310. [PMID: 30156533 DOI: 10.1099/ijsem.0.002988] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Three strains representing a novel yeast species, Sugiyamaella xiaguanensis f.a., sp. nov. (type strain NYNU 161041T=CICC 33167T=CBS 14696T), were isolated from rotting wood samples collected in Henan and Yunnan Provinces, PR China. The novel species is able to assimilate cellobiose, salicin and d-xylose, which was typical of the species of the genus Sugiyamaella. Analysis of the D1/D2 domains of the large subunit rRNA gene and internal transcribed spacer regions of these strains showed that this species was related to Sugiyamaella lignohabitans and Sugiyamaella marionensis, its closest relatives. Su. xiaguanensis sp. nov. differed by 1.4 % nucleotide substitutions from Su. lignohabitans, and by 1.9 % nucleotide substitutions from Su. marionensis in the D1/D2 sequences. The ITS sequences of Su. xiaguanensis sp. nov. displayed more than 6.5 % nucleotide substitutions from the latter two species, showing that it is a genetically separate species.
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Affiliation(s)
- Lin-Na Huang
- School of Life Science and Technology, Nanyang Normal University, Nanyang 473061, PR China
| | - Zhi-Wen Xi
- School of Life Science and Technology, Nanyang Normal University, Nanyang 473061, PR China
| | - Ying Li
- 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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12
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Khunnamwong P, Surussawadee J, Srisuk N, Boonmak C, Limtong S. Papiliotrema phichitensis f.a., sp. nov., a novel yeast species isolated from sugarcane leaf in Thailand. Antonie van Leeuwenhoek 2018; 111:2455-2461. [PMID: 30062388 DOI: 10.1007/s10482-018-1134-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 07/25/2018] [Indexed: 10/28/2022]
Abstract
Strain DMKU-SP105T representing a novel yeast species was isolated from the external surface of a sugarcane leaf (Saccharum officinarum L.) collected from a sugarcane plantation field in Phichit province, Thailand. On the basis of sequence analysis of the D1/D2 region of the large subunit (LSU) rRNA gene and the internal transcribed spacer (ITS) region, the strain DMKU-SP105T differed by 7-16 substitutions in the D1/D2 region of LSU rRNA gene and 6-22 substitutions in the ITS region from a group of related species, Papiliotrema aspenensis, Papiliotrema odontotermitis, Papiliotrema rajasthanensis and Papiliotrema laurentii. A phylogenetic analysis based on the concatenated sequences of ITS region and the D1/D2 region of the LSU rRNA gene indicated that strain DMKU-SP105T belongs to the laurentii clade of Papiliotrema in the Tremellales and is distinct from other related species in the clade. It therefore represents a novel species of the genus Papiliotrema although the formation of basidiospores was not observed. The name Papiliotrema phichitensis f.a., sp. nov. is proposed. The type is DMKU-SP105T (= CBS 13390T = BCC 61187T = NBRC 109699T).
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Affiliation(s)
- Pannida Khunnamwong
- Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand
| | - Janjira Surussawadee
- Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand
| | - Nantana Srisuk
- Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand
| | - Chanita Boonmak
- Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok, 10900, 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.
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Ali SS, Wu J, Xie R, Zhou F, Sun J, Huang M. Screening and characterizing of xylanolytic and xylose-fermenting yeasts isolated from the wood-feeding termite, Reticulitermes chinensis. PLoS One 2017; 12:e0181141. [PMID: 28704553 PMCID: PMC5509302 DOI: 10.1371/journal.pone.0181141] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 06/21/2017] [Indexed: 11/20/2022] Open
Abstract
The effective fermentation of xylose remains an intractable challenge in bioethanol industry. The relevant xylanase enzyme is also in a high demand from industry for several biotechnological applications that inevitably in recent times led to many efforts for screening some novel microorganisms for better xylanase production and fermentation performance. Recently, it seems that wood-feeding termites can truly be considered as highly efficient natural bioreactors. The highly specialized gut systems of such insects are not yet fully realized, particularly, in xylose fermentation and xylanase production to advance industrial bioethanol technology as well as industrial applications of xylanases. A total of 92 strains from 18 yeast species were successfully isolated and identified from the gut of wood-feeding termite, Reticulitermes chinensis. Of these yeasts and strains, seven were identified for new species: Candida gotoi, Candida pseudorhagii, Hamamotoa lignophila, Meyerozyma guilliermondii, Sugiyamaella sp.1, Sugiyamaella sp. 2, and Sugiyamaella sp.3. Based on the phylogenetic and phenotypic characterization, the type strain of C. pseudorhagii sp. nov., which was originally designated strain SSA-1542T, was the most frequently occurred yeast from termite gut samples, showed the highly xylanolytic activity as well as D-xylose fermentation. The highest xylanase activity was recorded as 1.73 and 0.98 U/mL with xylan or D-xylose substrate, respectively, from SSA-1542T. Among xylanase-producing yeasts, four novel species were identified as D-xylose-fermenting yeasts, where the yeast, C. pseudorhagii SSA-1542T, showed the highest ethanol yield (0.31 g/g), ethanol productivity (0.31 g/L·h), and its fermentation efficiency (60.7%) in 48 h. Clearly, the symbiotic yeasts isolated from termite guts have demonstrated a competitive capability to produce xylanase and ferment xylose, suggesting that the wood-feeding termite gut is a promising reservoir for novel xylanases-producing and xylose-fermenting yeasts that are potentially valued for biorefinery industry.
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Affiliation(s)
- Sameh Samir Ali
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
- Botany Department, Faculty of Science, Tanta University, Tanta, Egypt
| | - Jian Wu
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
| | - Rongrong Xie
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
| | - Feng Zhou
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
| | - Jianzhong Sun
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
- * E-mail:
| | - Miao Huang
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
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