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Sumera NS, Iqbal SS, Khan ST, Rehman ZU. Fusarium oxysporum; its enhanced entomopathogenic activity with acidic silver nanoparticles against Rhipicephalus microplus ticks. BRAZ J BIOL 2023; 84:e266741. [PMID: 36820787 DOI: 10.1590/1519-6984.266741] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 11/29/2022] [Indexed: 02/22/2023] Open
Abstract
Fusarium oxysporum is an entomopathogenic fungus, and it has anti-biological activity against arthropods. Ticks are blood sucking arthropods which are responsible for transmitting different diseases in humans and animals. The use of chemical insecticides against ticks is not eco-friendly option and results in the development of acaricide resistance. Previously, we had cultured a local isolate of Fusarium oxysporum from soil samples which were identified through microscopy and confirmed through molecular technique. In our previous experiments, we have prepared Silver nanoparticles (AgNP) at pH 7 and they had been characterized through X-Ray Diffraction (XRD), UV-visible and zeta-potential. In our current study, the AgNP were prepared at different pH conditions and characterized through Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The protein molecules of F. oxysporum were charged with Ag ions. F. oxysporum NP were observed to enhance anti-biological activity by killing Rhipicephalus microplus and they caused 100% mortality at pH 4 and pH 5 in 24 h in anti-tick biological assay. Our study is the first report to do biological assay against Rhipicehalus ticks by using Fusarium AgNP at acidic pH. Biological control using entomopathogenic fungi can be the best alternative of the chemical method to control the tick population.
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Affiliation(s)
- N S Sumera
- Government College for Women, Department of Physics, Mustafabad, Lahore, Pakistan.,University of Lahore, Department of Physics, Lahore, Pakistan
| | - S S Iqbal
- University of Lahore, Department of Physics, Lahore, Pakistan.,Lahore Garrison University, Department of Physics, Lahore, Pakistan
| | - S T Khan
- University of Veterinary and Animal Sciences, Department of Parasitology, Lahore, Pakistan
| | - Z Ul Rehman
- University of Veterinary and Animal Sciences, Department of Parasitology, Lahore, Pakistan
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2
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Ebrahim W, Ebada SS. Antimicrobial Metabolites from Extremophilic Fungus Botryotrichum piluliferum Strain WESH19. Chem Nat Compd 2021. [DOI: 10.1007/s10600-021-03443-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Extremophilic Fungi and Their Role in Control of Pathogenic Microbes. Fungal Biol 2021. [DOI: 10.1007/978-3-030-60659-6_10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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4
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Rafiq M, Nadeem S, Hassan N, Hayat M, Sajjad W, Zada S, Sajjad W, Hasan F. Fungal recovery and characterization from Hindu Kush mountain range, Tirich Mir glacier, and their potential for biotechnological applications. J Basic Microbiol 2020; 60:444-457. [PMID: 32147851 DOI: 10.1002/jobm.201900608] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 02/20/2020] [Accepted: 02/26/2020] [Indexed: 11/10/2022]
Abstract
The Hindu Kush mountains spread over Northern areas of Pakistan having hundreds of glaciers representing a unique ecosystem driven by the specific geochemistry and climate. The current study measured the distribution of culturable fungi in Tirich Mir glacier, Hindu Kush range, and the potential of these isolates to show antimicrobial activity and produce biotechnologically important enzymes. Samples of glacial ice, sediments, and meltwater were collected from Tirich Mir glacier, and 46 fungal strains were isolated and characterized for identity and biotechnological applications. The findings revealed Penicillium (10) as the most common genus, followed by Alternaria (9), Cladosporium (7), Coprinopsis, two isolates each belonging to genus Phoma, Ulocladium, Epicoccum, Onygenales, and Didymella, and one isolate of genus Davidiella, Aspergillus, Geomyces, Dothideomycetes, Pseudogymnoascus, Irpex, Scopulariopsis, Ascochyta, Tomicus, and Davidiellaceae. Davidiella tassiana HTF9 showed growth in the presence of 18% NaCl and pH 2, 3, 5, 7, 9, and 11. The isolates Ulocladium sp. and Onygenales sp. inhibited the growth of test fungi, Gram-negative and positive bacteria. Fungal strains were capable of producing cold-active enzymes, including cellulase, lipase, amylase, and deoxyribonuclease. The isolate Penicillium chrysogenum HTF24 was an efficient producer of amylase, deoxyribonuclease, and cellulase. The fungi of high-altitude glaciers are potent candidates for biotechnological applications; however, studies using more sensitive techniques are needed for further exploration.
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Affiliation(s)
- Muhammad Rafiq
- Department of Microbiology, Quaid-i-Azam University, Islamabad, Pakistan.,Department of Microbiology, Baluchistan University of Information Technology, Engineering, and Management Sciences, Quetta, Pakistan
| | - Shaukat Nadeem
- Department of Microbiology, Quaid-i-Azam University, Islamabad, Pakistan
| | - Noor Hassan
- Department of Microbiology, Quaid-i-Azam University, Islamabad, Pakistan
| | - Muhammad Hayat
- State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Jinan, Shandong, China
| | - Wasim Sajjad
- State Key Laboratory of Cryosphere Science, Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences, Lanzhou, China
| | - Sahib Zada
- Department of Microbiology, Quaid-i-Azam University, Islamabad, Pakistan
| | - Wasim Sajjad
- Department of Biological Sciences, National University of Medical Sciences, Islamabad, Pakistan
| | - Fariha Hasan
- Department of Microbiology, Quaid-i-Azam University, Islamabad, Pakistan
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5
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A meta-barcoding analysis of soil mycobiota of the upper Andean Colombian agro-environment. Sci Rep 2019; 9:10085. [PMID: 31300737 PMCID: PMC6625999 DOI: 10.1038/s41598-019-46485-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 06/17/2019] [Indexed: 11/23/2022] Open
Abstract
Colombia is a country for which one of the highest biodiversity rates is reported, and one of the first in the tropical areas where an effort was made to gather information on indigenous fungi. Nevertheless, mycological data are still scarce and discontinuous, above all on soil fungi. The present study wanted to contribute to unveil the large soil fungal biodiversity in the upper Andean Colombian agro-ecosystems. The studied area is located in the department of Boyacà, considered with a notable economical value, partly devoted to subsistence agriculture. More than 150 described species were revealed in this study, belonging to 5 phyla with Ascomycota representing the dominant taxon. Basidiomycota and Zygomycota are also well represented, dominated by species of the genus Sebacina and Mortierella respectively, mainly distributed in the semi-natural plots (woodland and grassland). Most of the species are reported as first records for Colombia. Some of them are particularly interesting for their conservation significance such as Geoglossum fallax, which is the dominant species in the unimproved grassland plot. The bootstrap-based clustering analysis showed a different distribution of the species in orchards and non-cultivated areas as a possible response of the fungal community to different use of soil in the agro-environment.
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Ragavendran C, Manigandan V, Kamaraj C, Balasubramani G, Prakash JS, Perumal P, Natarajan D. Larvicidal, Histopathological, Antibacterial Activity of Indigenous Fungus Penicillium sp. Against Aedes aegypti L and Culex quinquefasciatus (Say) (Diptera: Culicidae) and Its Acetylcholinesterase Inhibition and Toxicity Assessment of Zebrafish ( Danio rerio). Front Microbiol 2019; 10:427. [PMID: 30936853 PMCID: PMC6431641 DOI: 10.3389/fmicb.2019.00427] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 02/19/2019] [Indexed: 11/17/2022] Open
Abstract
Fungal metabolites are considered to be most efficient tools to overcome the issues related to insecticide resistance and environmental pollution. The present study focus on the evaluation of the mosquito larvicidal efficacy of metabolites of seven indigenous fungal isolates (Penicillium sp. Aspergillus niger, A. flavus, A. parasiticus, Rhizopus sp. Mucor sp. and Aspergillus sp.) on the larvae of Aedes aegypti and Culex quinquefasciatus under the laboratory condition. The preliminary screening of the isolate, Penicillium sp. showed better larvicidal effect when compared to other fungi. The fungus was grown on Potato Dextrose Broth (PDB) in the laboratory (at 25°C) and maintained in the relative humidity (at 76 ± 4% for 15 days). Larvicidal potency of mycelial ethyl acetate extract (MEAE) of Penicillium sp. was performed against 1st to 4th instars larvae of Ae. aegypti and Cx. quinquefasciatus using four different concentrations (100, 200, 300, and 500 μg/ml) that showed better larval mortality values (μg/ml) of LC50 = 6.554, 5.487, 6.874, 6.892, and the LC90 = 11.486, 10.366, 12.879, 13.865 for Ae. aegypti and LC50 = 7.000, 13.943, 18.129, 25.212 and the LC90 = 12.541, 23.761, 30.923, 41.696 for Cx. quinquefasciatus. Exposure of metabolite to larvae resulted in behavior changes i.e., excitation, up and down with aggressive movement, anal papillae biting behavior. Further, the larvae treated with Penicillium sp. metabolite exhibited significant reduction in the levels of acetylcholinesterase. The 4th instar mosquito larvae treated with the 500 μg/ml mycelia extract showed severe histological damages. During the antibacterial analysis of Penicillium sp.- mycelium the maximum growth inhibition zone was recorded in Shigella dysenteriae (31.2 mm) and Klebsiella pneumoniae (31.1 mm) followed by others. In addition, to check the toxicity of Penicillium sp. MEAE against embryos of Zebrafish, a model system, using different concentrations of metabolites (1.0, 0.5, 0.125 mg/ml, 30, 3.0, and 0.5 μg/ml) and life-stage parameters were observed at 124 hpf. Furthermore, the Fourier Transformed Infrared and GCMS spectrum analysis of mycelium reflected several chemical compounds. The outcome of the study clearly shows that Penicillium sp. metabolites could serve as an ideal eco-friendly, single-step and inexpensive source for the control of Ae. aegypti and Cx. quinquefasciatus larvae.
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Affiliation(s)
- Chinnasamy Ragavendran
- Natural Drug Research Laboratory, Department of Biotechnology, School of Biosciences, Periyar University, Salem, India
| | - Venkatesan Manigandan
- Biomedical Zebrafish Laboratory, Department of Medical Biotechnology, Faculty of Allied Health Sciences, Chettinad Academy of Research and Education, Chennai, India
| | - Chinnaperumal Kamaraj
- Marine Biotechnology and Ecological Genomics Laboratory, Department of Biotechnology, School of Biosciences, Periyar University, Salem, India
| | - Govindasamy Balasubramani
- Marine Biotechnology and Ecological Genomics Laboratory, Department of Biotechnology, School of Biosciences, Periyar University, Salem, India
| | - Joy Sebastian Prakash
- Biomedical Zebrafish Laboratory, Department of Medical Biotechnology, Faculty of Allied Health Sciences, Chettinad Academy of Research and Education, Chennai, India
| | - Pachiappan Perumal
- Marine Biotechnology and Ecological Genomics Laboratory, Department of Biotechnology, School of Biosciences, Periyar University, Salem, India
| | - Devarajan Natarajan
- Natural Drug Research Laboratory, Department of Biotechnology, School of Biosciences, Periyar University, Salem, India
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7
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Krumova E, Kostadinova N, Miteva-Staleva J, Stoyancheva G, Spassova B, Abrashev R, Angelova M. Potential of ligninolytic enzymatic complex produced by white-rot fungi from genus Trametes isolated from Bulgarian forest soil. Eng Life Sci 2018; 18:692-701. [PMID: 32624949 DOI: 10.1002/elsc.201800055] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 06/14/2018] [Accepted: 06/20/2018] [Indexed: 11/09/2022] Open
Abstract
Because of the crucial role of ligninolytic enzymes in a variety of industrial processes, the demand for a new effective producer has been constantly increasing. Furthermore, information on enzyme synthesis by autochthonous fungal strains is very seldom found. Two fungal strains producing ligninolytic enzymes were isolated from Bulgarian forest soil. They were identified as being Trametes trogii and T. hirsuta. These two strains were assessed for their enzyme activities, laccase (Lac), lignin peroxidase (LiP) and Mn-dependent peroxidase (MnP) in culture filtrate depending on the temperature and the type of nutrient medium. T. trogii was selected as the better producer of ligninolytic enzymes. The production process was further improved by optimizing a number of parameters such as incubation time, type of cultivation, volume ratio of medium/air, inoculum size and the addition of inducers. The maximum activities of enzymes synthesized by T. trogii was detected as 11100 U/L for Lac, 2.5 U/L for LiP and 4.5 U/L for MnP after 14 days of incubation at 25°C under static conditions, volume ratio of medium/air 1:6, and 3 plugs as inoculum. Among the supplements tested, 5% glycerol increased Lac activity to a significant extent. The addition of 1% veratryl alcohol had a positive effect on MnP.
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Affiliation(s)
- Ekaterina Krumova
- Department of Mycology The Stephan Angeloff Institute of Microbiology Bulgarian Academy of Sciences Sofia Bulgaria
| | - Nedelina Kostadinova
- Department of Mycology The Stephan Angeloff Institute of Microbiology Bulgarian Academy of Sciences Sofia Bulgaria
| | - Jeni Miteva-Staleva
- Department of Mycology The Stephan Angeloff Institute of Microbiology Bulgarian Academy of Sciences Sofia Bulgaria
| | - Galina Stoyancheva
- Department of General Microbiology The Stephan Angeloff Institute of Microbiology Bulgarian Academy of Sciences Sofia Bulgaria
| | - Boryana Spassova
- Department of Mycology The Stephan Angeloff Institute of Microbiology Bulgarian Academy of Sciences Sofia Bulgaria
| | - Radoslav Abrashev
- Department of Mycology The Stephan Angeloff Institute of Microbiology Bulgarian Academy of Sciences Sofia Bulgaria
| | - Maria Angelova
- Department of Mycology The Stephan Angeloff Institute of Microbiology Bulgarian Academy of Sciences Sofia Bulgaria
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8
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Psychrotrophic Microbiomes: Molecular Diversity and Beneficial Role in Plant Growth Promotion and Soil Health. MICROORGANISMS FOR SUSTAINABILITY 2018. [DOI: 10.1007/978-981-10-7146-1_11] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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9
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Al-Enazi NM, Awaad AS, Al-Othman MR, Al-Anazi NK, Alqasoumi SI. Isolation, identification and anti-candidal activity of filamentous fungi from Saudi Arabia soil. Saudi Pharm J 2017; 26:253-257. [PMID: 30166924 PMCID: PMC6111189 DOI: 10.1016/j.jsps.2017.12.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Accepted: 12/03/2017] [Indexed: 11/18/2022] Open
Abstract
Ten fungal strains; namely, Penicillium melinii, Petriella setifera, Aspergillus pseudo-niger, Alternaria chlamydospora, Pythium nayoroense, Phoma glomerata, Mucor ramosissimus, Mucor racemosus, Fusarium chlamydosporum and Rhizopus azygosporus were isolated from soil. The extra- and intra-cellular extracts of the fungal strains grown on malt extract and yeast-extract sucrose media were screened for their anticandidal activity against different clinically-isolated Candida species. Most of the fungal extracts showed activity against different Candida species. However, the fungal strains grew on malt extract showed greater activities than those grew on yeast extract sucrose media. The activity of the intracellular was higher than the extracellular metabolites. All fungal extracts (extra and intra) were similar in chemical constituent; they contained carbohydrates and/or glycosides, unsaturated sterols and/or triterpens, tannins and traces of coumarins. Alkaloids, flavonoids, saponins, anthraquinones and cardenolides were no detected. The intra-cellular extracts contained more compounds than the extra-cellular extracts.
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Affiliation(s)
- Nouf M. Al-Enazi
- Biology Department, College of Science and Humanity Studies, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
| | - Amani S. Awaad
- Pharmacognosy Department, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
- Corresponding author at: P.O. Box 173, Riyadh 11942, Saudi Arabia.
| | - Monerah R. Al-Othman
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Nour K. Al-Anazi
- Pharmaceutics Department, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
| | - Saleh I. Alqasoumi
- Pharmacognosy Department, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
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10
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Asemoloye MD, Ahmad R, Jonathan SG. Synergistic rhizosphere degradation of γ-hexachlorocyclohexane (lindane) through the combinatorial plant-fungal action. PLoS One 2017; 12:e0183373. [PMID: 28859100 PMCID: PMC5578508 DOI: 10.1371/journal.pone.0183373] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 08/02/2017] [Indexed: 11/19/2022] Open
Abstract
Fungi are usually involved in degradation/deterioration of many anthropogenic wastes due to their verse enzyme secretions and adaptive capabilities. In this study, five dominant fungal strains were isolated from an aged lindane polluted site, they were all mixed (100 mg each) together with pent mushroom compost (SMC) and applied to lindane polluted soil (5 kg) at 10, 20, 30, 40% and control 0% (soil with no treatment), these were used to grow M. maximus Jacq for 3 months. To establish lindane degradation, deductions such as Degradation rate (K1), Half-life (t1/2) and Degradation efficiency (DE) were made based on the analyzed lindane concentrations before and after the experiment. We also tested the presence and expressions of phosphoesterases (mpd and opd-A) and catechol 1,2-dioxygenases (efk2 and efk4) genes in the strains. The stains were identified as Aspergillus niger (KY693970); Talaromyces atroroseus (KY488464), Talaromyces purpurogenus (KY488468), Yarrowia lipolytica (KY488469) and Aspergillus flavus (KY693973) through morphological and molecular methods. Combined rhizospheric action of M. maximus and fungi speed up lindane degradation rate, initially detected lindane concentration of 45 mg/kg was reduced to 11.26, 9.34 and 11.23 mg/kg in 20, 30 and 40% treatments respectively making 79.76, 85.93 and 88.67% degradation efficiencies. K1 of 1.29 was recorded in control while higher K1 of 1.60, 1.96 and 2.18 /day were recorded in 20, 30 and 40% treatments respectively. The best t1/2 of 0.32 and 0.35 /day were recorded in 40 and 30% compared to control (0.54 /day). All the strains were also affirmed to possess the tested genes; opd was overexpressed in all the strains except KY693973 while mpd was overexpressed in KY693970, KY488464 but moderately expressed in KY488468, KY488469 and KY693973. However, efk genes were under-expressed in most of the strains except KY488469 and KY693973 which showed moderate expression of efk4. This work suggests that the synergistic association of the identified rhizospheric fungi and M. maximus roots could be used to remove lindane in soil at a limited time period and this combination could be used at large scale.
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Affiliation(s)
- Michael Dare Asemoloye
- Food and Environmental Mycology/Biotechnology Unit, Department of Botany, University of Ibadan, Ibadan, Nigeria
| | - Rafiq Ahmad
- Department of Environmental Sciences, COMSATS Institute of Information Technology, Abbottabad, Pakistan
| | - Segun Gbolagade Jonathan
- Food and Environmental Mycology/Biotechnology Unit, Department of Botany, University of Ibadan, Ibadan, Nigeria
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11
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Martorell MM, Ruberto LAM, Fernández PM, Castellanos de Figueroa LI, Mac Cormack WP. Bioprospection of cold-adapted yeasts with biotechnological potential from Antarctica. J Basic Microbiol 2017; 57:504-516. [PMID: 28272809 DOI: 10.1002/jobm.201700021] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 02/10/2017] [Accepted: 02/18/2017] [Indexed: 11/07/2022]
Abstract
The aim of this study was to investigate the ability to produce extracellular hydrolytic enzymes at low temperature of yeasts isolated from 25 de Mayo island, Antarctica, and to identify those exhibiting one or more of the evaluated enzymatic activities. A total of 105 yeast isolates were obtained from different samples and 66 were identified. They belonged to 12 basidiomycetous and four ascomycetous genera. Most of the isolates were ascribed to the genera Cryptococcus, Mrakia, Cystobasidium, Rhodotorula, Gueomyces, Phenoliferia, Leucosporidium, and Pichia. Results from enzymes production at low temperatures revealed that the Antarctic environment contains metabolically diverse cultivable yeasts, which represent potential tools for biotechnological applications. While most the isolates proved to produce 2-4 of the investigated exoenzymes, two of them evidenced the six evaluated enzymatic activities: Pichia caribbica and Guehomyces pullulans, which were characterized as psycrotolerant and psycrophilic, respectively. In addition, P. caribbica could assimilate several n-alkanes and diesel fuel. The enzyme production profile and hydrocarbons assimilation capacity, combined with its high level of biomass production and the extended exponential growth phase make P. caribbica a promising tool for cold environments biotechnological purposes in the field of cold-enzymes production and oil spills bioremediation as well.
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Affiliation(s)
| | - Lucas Adolfo Mauro Ruberto
- Instituto Antártico Argentino (IAA), CONICET, Buenos Aires, Argentina.,Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Nanobiotecnología (NANOBIOTEC-UBA-CONICET), Buenos Aires, Argentina
| | - Pablo Marcelo Fernández
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI-CONICET), San Miguel de Tucumán, Tucumán, Argentina
| | - Lucía Inés Castellanos de Figueroa
- Planta Piloto de Procesos Industriales Microbiológicos (PROIMI-CONICET), San Miguel de Tucumán, Tucumán, Argentina.,Universidad Nacional de Tucumán (UNT), Tucumán, Argentina
| | - Walter Patricio Mac Cormack
- Instituto Antártico Argentino (IAA), CONICET, Buenos Aires, Argentina.,Universidad de Buenos Aires, Buenos Aires, Argentina.,Instituto de Nanobiotecnología (NANOBIOTEC-UBA-CONICET), Buenos Aires, Argentina
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12
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Ibrahim NA, Abdel-Aziz MS, Eid BM, Hamdy SM, Abdallah SE. Biosynthesis, optimization and potential textile application of fungal cellulases/xylanase multifunctional enzyme preparation from Penicillium sp. SAF6. BIOCATAL BIOTRANSFOR 2016. [DOI: 10.1080/10242422.2016.1237943] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Nabil A. Ibrahim
- Textile Research Division, National Research Center, Giza, Egypt,
| | | | - Basma M. Eid
- Textile Research Division, National Research Center, Giza, Egypt,
| | - Soha M. Hamdy
- Chemistry Department, Faculty of Science, Fayoum University, Faiyum, Egypt
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13
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Hammerschmidt L, Aly AH, Abdel-Aziz M, Müller WE, Lin W, Daletos G, Proksch P. Cytotoxic acyl amides from the soil fungus Gymnascella dankaliensis. Bioorg Med Chem 2015; 23:712-9. [DOI: 10.1016/j.bmc.2014.12.068] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 12/26/2014] [Accepted: 12/28/2014] [Indexed: 01/16/2023]
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14
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Rovati JI, Pajot HF, Ruberto L, Mac Cormack W, Figueroa LIC. Polyphenolic substrates and dyes degradation by yeasts from 25 de Mayo/King George Island (Antarctica). Yeast 2014; 30:459-70. [PMID: 24298603 DOI: 10.1002/yea.2982] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Antarctica offers a range of extreme climatic conditions, such as low temperatures, high solar radiation and low nutrient availability, and constitutes one of the harshest environments on Earth. Despite that, it has been successfully colonized by ’cold-loving’ fungi, which play a key role in decomposition cycles in cold ecosystems. However, knowledge about the ecological role of yeasts in nutrient or organic matter recycling/mineralization remains highly fragmentary. The aim of this work was to study the yeast microbiota in samples collected on 25 de Mayo/King George Island regarding the scope of their ability to degrade polyphenolic substrates such as lignin and azo dyes. Sixty-one yeast isolates were obtained from 37 samples, including soil, rocks, wood and bones. Molecular analyses based on rDNA sequences revealed that 35 yeasts could be identified at the species level and could be classified in the genera Leucosporidiella, Rhodotorula, Cryptococcus, Bullera and Candida. Cryptococcus victoriae was by far the most ubiquitous species. In total, 33% of the yeast isolates examined showed significant activity for dye decolorization, 25% for laccase activity and 38% for ligninolytic activity. Eleven yeasts did not show positive activity in any of the assays performed and no isolates showed positive activity across all tested substrates. A high diversity of yeasts were isolated in this work, possibly including undescribed species and conspicuous Antarctic yeasts, most of them belonging to oligotrophic, slow-growing and metabolically diverse basidiomycetous genera.
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15
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Frączek KJ, Ropek DR, Lenart-Boroń AM. Assessment of microbiological and chemical properties in a municipal landfill area. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2014; 49:593-599. [PMID: 24410690 DOI: 10.1080/10934529.2014.859464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This study aimed at determining the environmental hazards for soils posed by a large municipal landfilll. The concentrations of heavy metals and Policyclic Aromatic Hydrocarbons, as well as microbial composition (i.e., mesophilic bacteria, actinomycetes, molds, Salmonella, Staphylococcus, Clostridium perfringens) in four soils within and in the vicinity of the landfill were evaluated and compared to waste samples. Both chemical and microbiological analyses revealed only limited contamination of surrounding areas. Although the increased alkalinity of soils was detected, the concentrations of heavy metals and Polycyclic Aromatic Hydrocarbons (PAHs) did not exceed the admissible values. All examined microbial groups were abundant in soil and waste. The highest microbial cell numbers were observed in warm summer and spring months. Although the site south of the landfill shows no trace of microbial contamination, pathogenic bacteria were found north of the landfill. This may suggest that there are other, more effective, transmission routes of bacteria than groundwater flow.
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Cold, pH and salt tolerant Penicillium spp. inhabit the high altitude soils in Himalaya, India. World J Microbiol Biotechnol 2013; 30:1315-24. [DOI: 10.1007/s11274-013-1545-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Accepted: 10/28/2013] [Indexed: 10/26/2022]
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17
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