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Glushakova A, Sharova A, Kachalkin A. Seasonal Dynamics of Culturable Yeasts in Ornithogenically Influenced Soils in a Temperate Forest and Evaluation of Extracellular Enzyme Secretion in Tausonia pullulans at Different Temperatures. J Fungi (Basel) 2024; 10:532. [PMID: 39194858 DOI: 10.3390/jof10080532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 07/26/2024] [Accepted: 07/28/2024] [Indexed: 08/29/2024] Open
Abstract
The culturable yeast communities in temperate forest soils under the ornithogenic influence were studied in a seasonal dynamic. To investigate the intense ornithogenic influence, conventional and "live" feeders were used, which were attached to trees in the forest and constantly replenished throughout the year. It was found that the yeast abundance in the soil under strong ornithogenic influence reached the highest values in winter compared to the other seasons and amounted to 4.8 lg (cfu/g). This was almost an order of magnitude higher than the minimum value of yeast abundance in ornithogenic soils determined for summer. A total of 44 yeast species, 21 ascomycetes and 23 basidiomycetes, were detected in ornithogenic soil samples during the year. These included soil-related species (Barnettozyma californica, Cyberlindnera misumaiensis, Cutaneotrichosporon moniliiforme, Goffeauzyma gastrica, Holtermanniella festucosa, Leucosporidium creatinivorum, L. yakuticum, Naganishia adeliensis, N. albidosimilis, N. globosa, Tausonia pullulans, and Vanrija albida), eurybionts (yeast-like fungus Aureobasidium pullulans, Debaryomyces hansenii, and Rhodotorula mucilaginosa), inhabitants of plant substrates and litter (Cystofilobasidium capitatum, Cys. infirmominiatum, Cys. macerans, Filobasidium magnum, Hanseniaspora uvarum, Metschnikowia pulcherrima, and Rh. babjevae) as well as a group of pathogenic and opportunistic yeast species (Arxiozyma bovina, Candida albicans, C. parapsilosis, C. tropicalis, Clavispora lusitaniae, and Nakaseomyces glabratus). Under an ornithogenic influence, the diversity of soil yeasts was higher compared to the control, confirming the uneven distribution of yeasts in temperate forest soils and their dependence on natural hosts and vectors. Interestingly, the absolute dominant species in ornithogenic soils in winter (when the topsoil temperature was below zero) was the basidiomycetous psychrotolerant yeast T. pullulans. It is regularly observed in various soils in different geographical regions. Screening of the hydrolytic activity of 50 strains of this species at different temperatures (2, 4, 10, 15 and 20 °C) showed that the activity of esterases, lipases and proteases was significantly higher at the cultivation temperature. Ornithogenic soils could be a source for the relatively easy isolation of a large number of strains of the psychrotolerant yeast T. pullulans to test, study and optimize their potential for the production of cold-adapted enzymes for industry.
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Affiliation(s)
- Anna Glushakova
- Soil Science Faculty, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
- I.I. Mechnikov Research Institute of Vaccines and Sera, 105064 Moscow, Russia
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms of RAS, 142290 Pushchino, Russia
| | - Anna Sharova
- Institute for African Studies of RAS, 123001 Moscow, Russia
| | - Aleksey Kachalkin
- Soil Science Faculty, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia
- G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms of RAS, 142290 Pushchino, Russia
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Gonçalves VN, Pimenta RS, Lopes FAC, Santos KCR, Silva MC, Convey P, Câmara PEAS, Rosa LH. Fungal and fungal-like diversity present in ornithogenically influenced maritime Antarctic soils assessed using metabarcoding. J Basic Microbiol 2024; 64:e2300601. [PMID: 38386010 DOI: 10.1002/jobm.202300601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 01/14/2024] [Accepted: 02/03/2024] [Indexed: 02/23/2024]
Abstract
We assessed soil fungal and fungal-like diversity using metabarcoding in ornithogenically influenced soils around nests of the bird species Phalacrocorax atriceps, Macronectes giganteus, Pygoscelis antarcticus, and Pygoscelis adelie on the South Shetland Islands, maritime Antarctic. A total of 1,392,784 fungal DNA reads was obtained and assigned to 186 amplicon sequence variants (ASVs). The dominant fungal phylum was Ascomycota, followed by Basidiomycota, Chytridiomycota, Blastocladiomycota, Rozellomycota, Mortierellomycota, Monoblepharomycota, Aphelidiomycota, Basidiobolomycota, Mucoromycota, and the fungal-like Oomycota (Stramenopila), in rank order. Antarctomyces sp., Blastocladiomycota sp., Pseudogymnoascus pannorum, Microascaceae sp., Mortierella sp., Lobulomycetales sp., Sordariomycetes sp., Fungal sp., Rhizophydiales sp., Pseudeurotiaceae sp., Chytridiomycota sp. 1, Filobasidiella sp., Tausonia pullulans, Betamyces sp., and Leucosporidium sp. were the most abundant assigned taxa. The fungal assemblages present in the different ornithogenically influenced soils displayed different diversity indices. However, in general, we detected high fungal diversity and few taxa shared between the samples. Despite the polyextreme environmental conditions experienced in these Antarctic soils, the metabarcoding approach detected a rich and complex fungal community dominated by saprophytes, but with some pathogenic taxa also present. The community was dominated by psychrophilic and psychrotolerant taxa, some apparently endemic to Antarctica, and those identified only at higher taxonomic levels, which may represent currently undescribed fungi. The mycobiome detected included taxa characterized by different ecological roles, including saprotrophic, human- and animal-associated, phytopathogenic, mutualistic, and cosmopolitan. These fungi may potentially be dispersed by birds or in the air column over great distances, including between different regions within Antarctica and from South America, Africa, and Oceania.
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Affiliation(s)
- Vívian Nicolau Gonçalves
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brasil
| | - Raphael Sânzio Pimenta
- Laboratório de Microbiologia Geral e Aplicada, Universidade Federal do Tocantins, Palmas, Tocantins, Brasil
| | - Fabyano A C Lopes
- Laboratório de Microbiologia, Universidade Federal do Tocantins, Palmas, Tocantins, Brasil
| | - Karita C R Santos
- Laboratório de Microbiologia, Universidade Federal do Tocantins, Palmas, Tocantins, Brasil
| | - Micheline C Silva
- Departamento de Botânica, Universidade de Brasília, Brasília, Brasil
| | - Peter Convey
- British Antarctic Survey, NERC, Cambridge, UK
- Department of Zoology, University of Johannesburg, Auckland Park, Johannesburg, South Africa
- Millennium Institute Biodiversity of Antarctic and Subantarctic Ecosystems (BASE), Santiago, Las Palmeras, Chile
- Cape Horn International Center (CHIC), Puerto Williams, Chile
| | - Paulo E A S Câmara
- Departamento de Botânica, Universidade de Brasília, Brasília, Brasil
- Programa de Pós-graduação em Fungos, Algas e Plantas, UFSC, Florianópolis, Brasil
| | - Luiz H Rosa
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brasil
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Teixeira EAA, de Souza LMD, Vieira R, Lirio JM, Coria SH, Convey P, Rosa CA, Rosa LH. Enzymes and biosurfactants of industrial interest produced by culturable fungi present in sediments of Boeckella Lake, Hope Bay, north-east Antarctic Peninsula. Extremophiles 2024; 28:30. [PMID: 38907846 DOI: 10.1007/s00792-024-01345-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Accepted: 05/27/2024] [Indexed: 06/24/2024]
Abstract
This study characterized cultivable fungi present in sediments obtained from Boeckella Lake, Hope Bay, in the north-east of the Antarctic Peninsula, and evaluated their production of enzymes and biosurfactants of potential industrial interest. A total of 116 fungal isolates were obtained, which were classified into 16 genera within the phyla Ascomycota, Basidiomycota and Mortierellomycota, in rank. The most abundant genera of filamentous fungi included Pseudogymnoascus, Pseudeurotium and Antarctomyces; for yeasts, Thelebolales and Naganishia taxa were dominant. Overall, the lake sediments exhibited high fungal diversity and moderate richness and dominance. The enzymes esterase, cellulase and protease were the most abundantly produced by these fungi. Ramgea cf. ozimecii, Holtermanniella wattica, Leucosporidium creatinivorum, Leucosporidium sp., Mrakia blollopis, Naganishia sp. and Phenoliferia sp. displayed enzymatic index > 2. Fourteen isolates of filamentous fungi demonstrated an Emulsification Index 24% (EI24%) ≥ 50%; among them, three isolates of A. psychrotrophicus showed an EI24% > 80%. Boeckella Lake itself is in the process of drying out due to the impact of regional climate change, and may be lost completely in approaching decades, therefore hosts a threatened community of cultivable fungi that produce important biomolecules with potential application in biotechnological processes.
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Affiliation(s)
- Elisa Amorim Amâncio Teixeira
- Laboratório de Microbiologia Polar E Conexões Tropicais, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, P. O. Box 486, Belo Horizonte, MG, CEP 31270-901, Brazil
| | - Láuren Machado Drumond de Souza
- Laboratório de Microbiologia Polar E Conexões Tropicais, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, P. O. Box 486, Belo Horizonte, MG, CEP 31270-901, Brazil
| | - Rosemary Vieira
- Departamento de Geografia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | | | - Peter Convey
- British Antarctic Survey, NERC, High Cross, Madingley Road, Cambridge, CB3 0ET, UK
- Department of Zoology, University of Johannesburg, Auckland Park, 2006, South Africa
- Millennium Institute Biodiversity of Antarctic and Subantarctic Ecosystems (BASE), Las Palmeras 3425, Santiago, Chile
- Cape Horn International Center (CHIC), Puerto Williams, Chile
| | - Carlos Augusto Rosa
- Laboratório de Microbiologia Polar E Conexões Tropicais, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, P. O. Box 486, Belo Horizonte, MG, CEP 31270-901, Brazil
| | - Luiz Henrique Rosa
- Laboratório de Microbiologia Polar E Conexões Tropicais, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, P. O. Box 486, Belo Horizonte, MG, CEP 31270-901, Brazil.
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Isola D, Lee HJ, Chung YJ, Zucconi L, Pelosi C. Once upon a Time, There Was a Piece of Wood: Present Knowledge and Future Perspectives in Fungal Deterioration of Wooden Cultural Heritage in Terrestrial Ecosystems and Diagnostic Tools. J Fungi (Basel) 2024; 10:366. [PMID: 38786721 PMCID: PMC11122135 DOI: 10.3390/jof10050366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/22/2024] [Accepted: 05/15/2024] [Indexed: 05/25/2024] Open
Abstract
Wooden Cultural Heritage (WCH) represents a significant portion of the world's historical and artistic heritage, consisting of immovable and movable artefacts. Despite the expertise developed since ancient times to enhance its durability, wooden artefacts are inevitably prone to degradation. Fungi play a pivotal role in the deterioration of WCH in terrestrial ecosystems, accelerating its decay and leading to alterations in color and strength. Reviewing the literature of the last 25 years, we aimed to provide a comprehensive overview of fungal diversity affecting WCH, the biochemical processes involved in wood decay, and the diagnostic tools available for fungal identification and damage evaluation. Climatic conditions influence the occurrence of fungal species in threatened WCH, characterized by a prevalence of wood-rot fungi (e.g., Serpula lacrymans, Coniophora puteana) in architectural heritage in temperate and continental climates and Ascomycota in indoor and harsh environments. More efforts are needed to address the knowledge fragmentation concerning biodiversity, the biology of the fungi involved, and succession in the degradative process, which is frequently centered solely on the main actors. Multidisciplinary collaboration among engineers, restorers, and life sciences scientists is vital for tackling the challenges posed by climate change with increased awareness. Traditional microbiology and culture collections are fundamental in laying solid foundations for a more comprehensive interpretation of big data.
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Affiliation(s)
- Daniela Isola
- Department of Economics, Engineering, Society and Business Organization (DEIM), University of Tuscia, Largo dell’Università Snc, 01100 Viterbo, Italy;
| | - Hyun-Ju Lee
- Institute of Preventive Conservation for Cultural Heritage, Korea National University of Cultural Heritage, Buyeo 33115, Republic of Korea;
| | - Yong-Jae Chung
- Department of Heritage Conservation and Restoration, Graduate School of Cultural Heritage, Korea National University of Cultural Heritage, Buyeo 33115, Republic of Korea;
| | - Laura Zucconi
- Department of Ecological and Biological Sciences (DEB), University of Tuscia, Largo dell’Università Snc, 01100 Viterbo, Italy;
| | - Claudia Pelosi
- Department of Economics, Engineering, Society and Business Organization (DEIM), University of Tuscia, Largo dell’Università Snc, 01100 Viterbo, Italy;
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Nimsi KA, Arya H, Manjusha K, Kathiresan K. Multifarious plant growth-promoting traits of mangrove yeasts: growth enhancement in mangrove seedlings (Rhizophora mucronata) for conservation. Arch Microbiol 2024; 206:192. [PMID: 38522061 DOI: 10.1007/s00203-024-03913-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 02/15/2024] [Accepted: 02/26/2024] [Indexed: 03/25/2024]
Abstract
Plant Growth-Promoting Yeasts (PGPY) have garnered significant attention in recent years; however, research on PGPY from mangroves remains a largely unexplored frontier. This study, therefore, focused on exploring the multifaceted plant growth-promoting (PGP) capabilities of yeasts isolated from mangroves of Puthuvype and Kumbalam. The present work found that manglicolous yeasts exhibited diverse hydrolytic properties, with the predominance of lipolytic activity, in addition to other traits such as phosphate solubilization, and production of indole acetic acid, siderophore, ammonia, catalase, nitrate, and hydrogen cyanide. After screening for 15 PGP traits, three strains P 9, PV 23, and KV 35 were selected as the most potent ones. These strains also exhibited antagonistic activity against fungal phytopathogens and demonstrated resilience to abiotic stresses, making them not only promising biocontrol agents but also suited for field application. The potent strains P 9, PV 23, and KV 35 were molecularly identified as Candida tropicalis, Debaryomyces hansenii, and Aureobasidium melanogenum, respectively. The potential of these strains in enhancing the growth performance of mangrove seedlings of Rhizophora mucronata, was demonstrated using the pot-experiment. The results suggested that the consortium of three potent strains (P 9, PV 23, and KV 35) was more effective in increasing the number of shoot branches (89.2%), plant weight (87.5%), root length (83.3%), shoot height (57.9%) and total leaf area (35.1%) than the control seedlings. The findings of this study underscore the significant potential of manglicolous yeasts in contributing to mangrove conservation and restoration efforts, offering a comprehensive understanding of their diverse plant growth-promoting mechanisms and highlighting their valuable role in sustainable ecosystem management.
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Affiliation(s)
- K A Nimsi
- Faculty of Ocean Science and Technology, Kerala University of Fisheries and Ocean Studies, Panangad, Kerala, 682506, India
| | - H Arya
- Faculty of Ocean Science and Technology, Kerala University of Fisheries and Ocean Studies, Panangad, Kerala, 682506, India
| | - K Manjusha
- Faculty of Ocean Science and Technology, Kerala University of Fisheries and Ocean Studies, Panangad, Kerala, 682506, India.
| | - K Kathiresan
- Faculty of Marine Sciences, Center for Advanced Study in Marine Biology, Annamalai University, Chidambaram, Tamil Nadu, 608502, India
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da Silva MK, Barreto DLC, Vieira R, Neto AA, de Oliveira FS, Convey P, Rosa CA, Duarte AWF, Rosa LH. Diversity and enzymatic, biosurfactant and phytotoxic activities of culturable Ascomycota fungi present in marine sediments obtained near the South Shetland Islands, maritime Antarctica. Extremophiles 2024; 28:20. [PMID: 38493412 DOI: 10.1007/s00792-024-01336-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Accepted: 02/11/2024] [Indexed: 03/18/2024]
Abstract
We studied the culturable fungal community recovered from deep marine sediments in the maritime Antarctic, and assessed their capabilities to produce exoenzymes, emulsifiers and metabolites with phytotoxic activity. Sixty-eight Ascomycota fungal isolates were recovered and identified. The most abundant taxon recovered was the yeast Meyerozyma guilliermondii, followed by the filamentous fungi Penicillium chrysogenum, P. cf. palitans, Pseudeurotium cf. bakeri, Thelebolus balaustiformis, Antarctomyces psychrotrophicus and Cladosporium sp. Diversity indices displayed low values overall, with the highest values obtained at shallow depth, decreasing to the deepest location sampled. Only M. guilliermondii and P. cf. palitans were detected in the sediments at all depths sampled, and were the most abundant taxa at all sample sites. The most abundant enzymes detected were proteases, followed by invertases, cellulases, lipases, carrageenases, agarases, pectinases and esterases. Four isolates showed good biosurfactant activity, particularly the endemic species A. psychrotrophicus. Twenty-four isolates of P. cf. palitans displayed strong phytotoxic activities against the models Lactuca sativa and Allium schoenoprasum. The cultivable fungi recovered demonstrated good biosynthetic activity in the production of hydrolytic exoenzymes, biosurfactant molecules and metabolites with phytotoxic activity, reinforcing the importance of documenting the taxonomic, ecological and biotechnological properties of fungi present in deep oceanic sediments of the Southern Ocean.
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Affiliation(s)
- Mayanne Karla da Silva
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Débora Luiza Costa Barreto
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Rosemary Vieira
- Instituto de Geociências, Universidade Federal Fluminense, Rio de Janeiro, RJ, Brazil
| | - Arthur Ayres Neto
- Instituto de Geociências, Universidade Federal Fluminense, Rio de Janeiro, RJ, Brazil
| | | | - Peter Convey
- British Antarctic Survey, NERC, High Cross, Madingley Road, Cambridge, CB3 0ET, UK
- Department of Zoology, University of Johannesburg, Auckland Park, 2006, South Africa
- Millennium Institute Biodiversity of Antarctic and Subantarctic Ecosystems (BASE), Las Palmeras 3425, Santiago, Chile
- Cape Horn International Center (CHIC), Puerto Williams, Chile
| | - Carlos Augusto Rosa
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Luiz Henrique Rosa
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, P. O. Box 486, Belo Horizonte, MG, CEP 31270-901, Brazil.
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de Melo Carlos L, Camacho KF, Duarte AW, de Oliveira VM, Boroski M, Rosa LH, Vieira R, Neto AA, Ottoni JR, Passarini MRZ. Bioprospecting the potential of the microbial community associated to Antarctic marine sediments for hydrocarbon bioremediation. Braz J Microbiol 2024; 55:471-485. [PMID: 38052770 PMCID: PMC10920520 DOI: 10.1007/s42770-023-01199-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 11/27/2023] [Indexed: 12/07/2023] Open
Abstract
Microorganisms that inhabit the cold Antarctic environment can produce ligninolytic enzymes potentially useful in bioremediation. Our study focused on characterizing Antarctic bacteria and fungi from marine sediment samples of King George and Deception Islands, maritime Antarctica, potentially affected by hydrocarbon influence, able to produce enzymes for use in bioremediation processes in environments impacted with petroleum derivatives. A total of 168 microorganism isolates were obtained: 56 from sediments of King George Island and 112 from Deception Island. Among them, five bacterial isolates were tolerant to cell growth in the presence of diesel oil and gasoline and seven fungal were able to discolor RBBR dye. In addition, 16 isolates (15 bacterial and one fungal) displayed enzymatic emulsifying activities. Two isolates were characterized taxonomically by showing better biotechnological results. Psychrobacter sp. BAD17 and Cladosporium sp. FAR18 showed pyrene tolerance (cell growth of 0.03 g mL-1 and 0.2 g mL-1) and laccase enzymatic activity (0.006 UL-1 and 0.10 UL-1), respectively. Our results indicate that bacteria and fungi living in sediments under potential effect of hydrocarbon pollution may represent a promising alternative to bioremediate cold environments contaminated with polluting compounds derived from petroleum such as polycyclic aromatic hydrocarbons and dyes.
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Affiliation(s)
- Layssa de Melo Carlos
- Laboratório de Biotecnologia Ambiental, Universidade Federal da Integração Latino-Americana - UNILA, Av. Tarquínio Joslin dos Santos, 1000 - Jd Universitário, Foz do Iguaçu, PR, 85870-650, Brazil
| | - Karine Fernandes Camacho
- Laboratório de Biotecnologia Ambiental, Universidade Federal da Integração Latino-Americana - UNILA, Av. Tarquínio Joslin dos Santos, 1000 - Jd Universitário, Foz do Iguaçu, PR, 85870-650, Brazil
| | | | | | - Marcela Boroski
- Programa de Pós-Graduação Em Energia & Sustentabilidade, Universidade Federal da Integração Latino-Americana - UNILA, Foz Do Iguaçu, Brazil
| | - Luiz Henrique Rosa
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Rosemary Vieira
- Instituto de Geociências, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Arthur A Neto
- Instituto de Geociências, Universidade Federal Fluminense, Niterói, RJ, Brazil
| | - Júlia Ronzella Ottoni
- Laboratório de Biotecnologia Ambiental, Universidade Federal da Integração Latino-Americana - UNILA, Av. Tarquínio Joslin dos Santos, 1000 - Jd Universitário, Foz do Iguaçu, PR, 85870-650, Brazil
| | - Michel R Z Passarini
- Laboratório de Biotecnologia Ambiental, Universidade Federal da Integração Latino-Americana - UNILA, Av. Tarquínio Joslin dos Santos, 1000 - Jd Universitário, Foz do Iguaçu, PR, 85870-650, Brazil.
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de Souza LMD, Ogaki MB, Teixeira EAA, de Menezes GCA, Convey P, Rosa CA, Rosa LH. Communities of culturable freshwater fungi present in Antarctic lakes and detection of their low-temperature-active enzymes. Braz J Microbiol 2023; 54:1923-1933. [PMID: 36274089 PMCID: PMC10484858 DOI: 10.1007/s42770-022-00834-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 09/20/2022] [Indexed: 11/02/2022] Open
Abstract
We evaluated the diversity and enzymatic activities of culturable fungi recovered from cotton baits submerged for 2 years in Hennequin Lake, King George Island, and from benthic biofilms in Kroner Lake, Deception Island, South Shetland Islands, maritime Antarctica. A total of 154 fungal isolates were obtained, representing in rank abundance the phyla Ascomycota, Basidiomycota and Mortierellomycota. Thelebolus globosus, Goffeauzyma sp., Pseudogymnoascus verrucosus and Metschnikowia australis were the most abundant taxa. The fungal community obtained from the biofilm was more diverse and richer than that recovered from the cotton baits. However, diversity indices suggested that the lakes may harbour further fungal diversity. The capabilities of all cultured fungi to produce the extracellular enzymes cellulase, protease, lipase, agarase, carrageenase, invertase, amylase, esterase, pectinase, inulinase and gelatinase at low temperature were evaluated. All enzymes were detected, but the most widely produced were protease and pectinase. The best enzymatic indices were obtained from Holtermanniella wattica (for invertase, esterase), Goffeauzyma sp. (amylase), Metschnikowia australis (protease), Mrakia blollopis (cellulase, pectinase), Pseudogymnoascus verrucosus (agarase, carrageenase) and Leucosporidium fragarium (inulinase). The detection of multiple enzymes reinforces the ecological role of fungi in nutrient cycling in Antarctic lakes, making nutrients available to the complex aquatic food web. Furthermore, such low-temperature-active enzymes may find application in different biotechnological processes, such as in the textile, pharmaceutical, food, detergent and paper industries, as well as environmental application in pollutant bioremediation processes.
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Affiliation(s)
| | - Mayara Bapstitucci Ogaki
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | | | - Peter Convey
- British Antarctic Survey, NERC, High Cross, Madingley Road, Cambridge, CB3 0ET, UK
- Department of Zoology, University of Johannesburg, PO Box 524, Auckland Park, 2006, South Africa
- Millennium Institute Biodiversity of Antarctic and Subantarctic Ecosystems (BASE), Valdivia, Chile
- Cape Horn International Center (CHIC), Puerto Williams, Chile
| | - Carlos Augusto Rosa
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Luiz Henrique Rosa
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
- Laboratório de Microbiologia Polar E Conexões Tropicais, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, P. O. Box 486, Belo Horizonte, MG, CEP 31270-901, Brazil.
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Oleaginous yeasts: Biodiversity and cultivation. FUNGAL BIOL REV 2023. [DOI: 10.1016/j.fbr.2022.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Phosphate solubilization by Antarctic yeasts isolated from lichens. Arch Microbiol 2022; 204:698. [DOI: 10.1007/s00203-022-03310-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 07/28/2022] [Accepted: 10/28/2022] [Indexed: 11/11/2022]
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Metabolomic Profiling, Antioxidant and Enzyme Inhibition Properties and Molecular Docking Analysis of Antarctic Lichens. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27228086. [PMID: 36432187 PMCID: PMC9692326 DOI: 10.3390/molecules27228086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 11/13/2022] [Accepted: 11/18/2022] [Indexed: 11/23/2022]
Abstract
The lichen species Lecania brialmontii, Pseudephebe pubescens, and Sphaerophorus globosus are part of the prominent lichenoflora of the Antarctic territory. In this work, we report the metabolomic identification of ethanolic extracts of these species, their antioxidant and cholinesterase enzyme inhibitory activity, and conduct a molecular docking analysis with typical compounds. Eighteen compounds were identified by UHPLC-ESI-QTOF-MS in L. brialmontii, 18 compounds in P. pubescens, and 14 compounds in S. globosus. The content of phenolic compounds was variable among the species, ranging from 0.279 to 2.821 mg AG/g, and all three species showed high inhibition potential on the cholinesterase enzymes. Molecular docking showed important interactions between AChE and BChE with the selected compounds. This study evidences the chemical fingerprint of three species of the order Lecanorales that support the continuation of the study of other biological activities and their potential for medical research.
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