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Gómez-Espinoza J, Riquelme C, Romero-Villegas E, Ahumada-Rudolph R, Novoa V, Méndez P, Millar C, Fernández-Alarcón N, Garnica S, Rajchenberg M, Cabrera-Pardo JR. Diversity of Agaricomycetes in southern South America and their bioactive natural products. Nat Prod Res 2023:1-15. [PMID: 37661754 DOI: 10.1080/14786419.2023.2244126] [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: 05/05/2023] [Revised: 07/03/2023] [Accepted: 07/24/2023] [Indexed: 09/05/2023]
Abstract
Fungi have a unique metabolic plasticity allowing them to produce a wide range of natural products. Since the discovery of penicillin, an antibiotic of fungal origin, substantial efforts have been devoted globally to search for fungal-derived natural bioactive products. Andean region forests represent one of the few undisturbed ecosystems in the world with little human intervention. While these forests display a rich biological diversity, mycological and chemical studies in these environments have been scarce. This review aims to summarise all the efforts regarding the chemical or bioactivity analyses of Agaricomycetes (Basidiomycota) from southern South America environments. Overall, herein we report a total of 147 fungal species, 21 of them showing chemical characterisation and/or biological activity. In terms of chemical cores, furans, chlorinated phenol derivatives, polyenes, lactones, terpenes and himanimides have been reported. These natural products displayed a range of biological activities including antioxidant, antimicrobial, antifungal, neuroprotective and osteoclast-forming suppressing effects.
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Affiliation(s)
- Jonhatan Gómez-Espinoza
- Laboratorio de Química Aplicada y Sustentable (LabQAS), Departamento de Química, Universidad del Bío-Bío, Concepción, Chile
| | - Cristian Riquelme
- Programa de Doctorado en Ciencias mención Ecología y Evolución, Escuela de Graduados, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
- Laboratorio de Micología, Instituto de Bioquímica y Microbiología, Universidad Austral de Chile, Valdivia, Chile
| | - Enzo Romero-Villegas
- Laboratorio de Química Aplicada y Sustentable (LabQAS), Departamento de Química, Universidad del Bío-Bío, Concepción, Chile
| | - Ramón Ahumada-Rudolph
- Laboratorio de Química Aplicada y Sustentable (LabQAS), Departamento de Química, Universidad del Bío-Bío, Concepción, Chile
| | - Vanessa Novoa
- Instituto de Alta Investigación, Universidad de Tarapacá, Arica, Chile
| | - Paola Méndez
- Laboratorio de Química Aplicada y Sustentable (LabQAS), Departamento de Química, Universidad del Bío-Bío, Concepción, Chile
| | - Camila Millar
- Laboratorio de Química Aplicada y Sustentable (LabQAS), Departamento de Química, Universidad del Bío-Bío, Concepción, Chile
| | - Naomi Fernández-Alarcón
- Laboratorio de Química Aplicada y Sustentable (LabQAS), Departamento de Química, Universidad del Bío-Bío, Concepción, Chile
| | - Sigisfredo Garnica
- Laboratorio de Micología, Instituto de Bioquímica y Microbiología, Universidad Austral de Chile, Valdivia, Chile
| | - Mario Rajchenberg
- Centro de Investigación y Extensión Forestal Andino Patagónico (CIEFAP), Chubut, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas, (CONICET), Buenos Aires, Argentina
| | - Jaime R Cabrera-Pardo
- Laboratorio de Química Aplicada y Sustentable (LabQAS), Departamento de Química, Universidad del Bío-Bío, Concepción, Chile
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Jia X, Wang W, Yao Y, He Y, Corvini PFX, Ji R. Fate of 2,4,6-Tribromophenol in Soil Under Different Redox Conditions. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2020; 104:707-713. [PMID: 32222794 DOI: 10.1007/s00128-020-02835-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 03/20/2020] [Indexed: 06/10/2023]
Abstract
Fate of 2,4,6-tribromophenol (TBP) in environmental matrices is obscure. We used 14C-tracer to investigated mineralization, transformation, and non-extractable residue (NER)-formation of TBP in a soil under continuously oxic, continuously anoxic, and anoxic-oxic alteration conditions. In all cases, TBP rapidly dissipated, mineralized to CO2, and formed NERs in the soil. Considerable amounts of transformation products (2-12%) were detected during the incubation. Marked mineralization (13-26%) indicated that soil microorganisms used TBP as their energy source. About 62-70% of the initial radioactivity was transformed into NERs, being mainly attributed to binding to humic and fulvic acid fractions. TBP transformation was significantly faster under oxic conditions than under anoxic conditions, and was boosted when the soil redox changed from anoxic to oxic state. The results provide new insights into fate of TBP in soil and suggest the importance to evaluate the stability of NERs for risk assessment of TBP in soil.
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Affiliation(s)
- Xiong Jia
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
| | - Wenji Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
| | - Yao Yao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
| | - Yujie He
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China.
- Quanzhou Institute for Environment Protection Industry, Nanjing University, Beifeng Road, Quanzhou, 362000, China.
| | - Philippe F-X Corvini
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
- Institute for Ecopreneurship, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Hofackerstrasse 30, 4132, Muttenz, Switzerland
| | - Rong Ji
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
- Quanzhou Institute for Environment Protection Industry, Nanjing University, Beifeng Road, Quanzhou, 362000, China
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Liang Z, Li G, Mai B, An T. Biodegradation of typical BFRs 2,4,6-tribromophenol by an indigenous strain Bacillus sp. GZT isolated from e-waste dismantling area through functional heterologous expression. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 697:134159. [PMID: 31491624 DOI: 10.1016/j.scitotenv.2019.134159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 08/22/2019] [Accepted: 08/27/2019] [Indexed: 06/10/2023]
Abstract
Legacy wastewater contaminants from e-waste dismantling process such as 2,4,6-tribromophenol (TBP), one of the most widely used brominated flame retardants (BFRs), have raised concern owing to their toxicity and recalcitrance. Our previously isolated Bacillus sp. GZT from river sludge in e-waste dismantling area is a good candidate for bioremediation of BFRs contaminated sites considering its remarkable degradability of TBP and its intermediates. However, there exists a new challenge because bio-degrader cannot produce enough biomass or metabolic activity to cleanup TBP in practice complex environment. Here, we heterologously expressed and functionally characterized the genes and enzymes responsible for TBP degradation to examine the feasibility of enhancing the ability of this microorganism to detoxify TBP. Results demonstrated that five recombinant strains containing functional genes, designated tbpA, tbpB, tbpC, tbpD, and tbpE, become more tolerant toward a wide range of brominated compounds than the nontransgenic strain. Cytochrome P450 reductase encoded by tbpA gene could greatly increase efficiency to remove TBP (98.8%), as compared to wild-type strain GZT (93.2%). Its debromination intermediates 2,4-dibromophenol, 2,6-dibromo-4-methylphenol and 2-bromophenol were significantly metabolized by halophenol dehalogenases encoded by tbpB, tbpC, and tbpD, respectively. Finally, under the function of tbpE gene encoding enzyme, further debrominated product (phenol) was dramatically detoxified. To reduce the risk of these xenobiotics, the expression of these genes can be induced and significantly up-regulated during exposure to them. These results open broad scope for future study in developing genetic engineering technologies for more efficient remediation wastewater of e-waste recycling sites contaminated with TBP, which would certainly be important steps to lower TBP exposures and prevent potential health effects.
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Affiliation(s)
- Zhishu Liang
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Guiying Li
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
| | - Bixian Mai
- State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Taicheng An
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
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Laccases from Marine Organisms and Their Applications in the Biodegradation of Toxic and Environmental Pollutants: a Review. Appl Biochem Biotechnol 2018; 187:583-611. [DOI: 10.1007/s12010-018-2829-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 06/25/2018] [Indexed: 10/28/2022]
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Koch C, Sures B. Environmental concentrations and toxicology of 2,4,6-tribromophenol (TBP). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 233:706-713. [PMID: 29126092 DOI: 10.1016/j.envpol.2017.10.127] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 10/29/2017] [Accepted: 10/29/2017] [Indexed: 06/07/2023]
Abstract
2,4,6-Tribromophenol is the most widely produced brominated phenol. In the present review, we summarize studies dealing with this substance from an environmental point of view. We cover concentrations in the abiotic and biotic environment including humans, toxicokinetics as well as toxicodynamics, and show gaps of the current knowledge about this chemical. 2,4,6-Tribomophenol occurs as an intermediate during the synthesis of brominated flame retardants and it similarly represents a degradation product of these substances. Moreover, it is used as a pesticide but also occurs as a natural product of some aquatic organisms. Due to its many sources, 2,4,6-tribromophenol is ubiquitously found in the environment. Nevertheless, not much is known about its toxicokinetics and toxicodynamics. It is also unclear which role the structural isomer 2,4,5-tribromophenol and several degradation products such as 2,4-dibromophenol play in the environment. Due to new flame retardants that enter the market and can degrade to 2,4,6-tribromophenol, this compound will remain relevant in future years - not only in aquatic matrices, but also in house dust and foodstuff, which are an important exposure route for humans.
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Affiliation(s)
- Christoph Koch
- Aquatic Ecology and Centre for Water and Environmental Research (ZWU), University Duisburg-Essen, 45141 Essen, Germany; Deutsche Rockwool GmbH & Co. KG, 45966 Gladbeck, Germany.
| | - Bernd Sures
- Aquatic Ecology and Centre for Water and Environmental Research (ZWU), University Duisburg-Essen, 45141 Essen, Germany
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Conceição AA, Cunha JRB, Vieira VO, Pelaéz RDR, Mendonça S, Almeida JRM, Dias ES, de Almeida EG, de Siqueira FG. Bioconversion and Biotransformation Efficiencies of Wild Macrofungi. Fungal Biol 2018. [DOI: 10.1007/978-3-030-02622-6_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Liang Z, Li G, An T. Purifying, cloning and characterizing a novel dehalogenase from Bacillus sp. GZT to enhance the biodegradation of 2,4,6-tribromophenol in water. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 225:104-111. [PMID: 28359974 DOI: 10.1016/j.envpol.2017.03.043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Revised: 03/06/2017] [Accepted: 03/18/2017] [Indexed: 06/07/2023]
Abstract
2,4,6-Tribromophenol (TBP), an intermediate of brominated flame retardants, can easily release to environment and recalcitrant to degradation. Previously, Bacillus sp. GZT, a pure aerobic strain capable of simultaneously debrominating and mineralizing TBP, was successfully isolated by us. To further obtain a practical application and dig up its TBP degradation mechanism, a total of 46.7-fold purification of a novel dehalogenase with a final specific activity of 18.9 U mg-1 and a molecular mass of 63.4 kDa was achieved. Under optimal conditions (35 °C and 200 rpm), up to 80% degradation efficiencies were achieved within 120 min. Adding H2O2, NADPH, Mn2+ and Mg2+ promoted enzyme reaction effectively; while EDTA, methyl viologen, Ni2+, Cu2+, Ca2+ and Fe2+ strongly inhibited reaction activities. The debromination of TBP was catalyzed by the enzyme at a Km of 78 μM and a Vmax of 0.65 min-1 mg protein-1, which indicated that this dehalogenase could specifically eliminate TBP with a high efficiency and stability. Based on MALDI-TOF/TOF analysis, the dehalogenase shared 98% identity with peptide ABC transporter substrate-binding protein. One open reading frame (ORF) encoding this peptide was found in Strain GZT genome, subjected to clone and expressed in Escherichia coli (E. coli) to characterize the encoding gene. Result showed that this recombinant strain could also remove as similar amount of TBP as Bacillus sp. GZT under the identical condition. Based on these results, we suggest that this newly-isolated TBP dehalogenase highlights a new approach for remediating TBP pollution.
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Affiliation(s)
- Zhishu Liang
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guiying Li
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China
| | - Taicheng An
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China.
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9
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Maqbool Z, Hussain S, Imran M, Mahmood F, Shahzad T, Ahmed Z, Azeem F, Muzammil S. Perspectives of using fungi as bioresource for bioremediation of pesticides in the environment: a critical review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:16904-16925. [PMID: 27272922 DOI: 10.1007/s11356-016-7003-8] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Accepted: 05/27/2016] [Indexed: 06/06/2023]
Abstract
Pesticides are used for controlling the development of various pests in agricultural crops worldwide. Despite their agricultural benefits, pesticides are often considered a serious threat to the environment because of their persistent nature and the anomalies they create. Hence removal of such pesticides from the environment is a topic of interest for the researchers nowadays. During the recent years, use of biological resources to degrade or remove pesticides has emerged as a powerful tool for their in situ degradation and remediation. Fungi are among such bioresources that have been widely characterized and applied for biodegradation and bioremediation of pesticides. This review article presents the perspectives of using fungi for biodegradation and bioremediation of pesticides in liquid and soil media. This review clearly indicates that fungal isolates are an effective bioresource to degrade different pesticides including lindane, methamidophos, endosulfan, chlorpyrifos, atrazine, cypermethrin, dieldrin, methyl parathion, heptachlor, etc. However, rate of fungal degradation of pesticides depends on soil moisture content, nutrient availability, pH, temperature, oxygen level, etc. Fungal strains were found to harbor different processes including hydroxylation, demethylation, dechlorination, dioxygenation, esterification, dehydrochlorination, oxidation, etc during the biodegradation of different pesticides having varying functional groups. Moreover, the biodegradation of different pesticides was found to be mediated by involvement of different enzymes including laccase, hydrolase, peroxidase, esterase, dehydrogenase, manganese peroxidase, lignin peroxidase, etc. The recent advances in understanding the fungal biodegradation of pesticides focusing on the processes, pathways, genes/enzymes and factors affecting the biodegradation have also been presented in this review article.
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Affiliation(s)
- Zahid Maqbool
- Department of Environmental Sciences & Engineering, Government College University, Faisalabad, Pakistan
| | - Sabir Hussain
- Department of Environmental Sciences & Engineering, Government College University, Faisalabad, Pakistan.
- UCD School of Biomolecular and Biomedical Sciences, University College Dublin, Belfield Dublin 4, Ireland.
| | - Muhammad Imran
- Department of Soil Science, Muhammad Nawaz Shareef University of Agriculture, Multan, Pakistan
- Environmental Microbiology, Soil Science Division, Nuclear Institute for Agriculture and Biology (NIAB), Faisalabad, Pakistan
| | - Faisal Mahmood
- Department of Environmental Sciences & Engineering, Government College University, Faisalabad, Pakistan
| | - Tanvir Shahzad
- Department of Environmental Sciences & Engineering, Government College University, Faisalabad, Pakistan
| | - Zulfiqar Ahmed
- Department of Environmental Sciences, PMAS Arid Agricultural University, Rawalpindi, Pakistan
| | - Farrukh Azeem
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Saima Muzammil
- Department of Microbiology, Government College University, Faisalabad, Pakistan
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Ezechiáš M, Covino S, Cajthaml T. Ecotoxicity and biodegradability of new brominated flame retardants: a review. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2014; 110:153-167. [PMID: 25240235 DOI: 10.1016/j.ecoenv.2014.08.030] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 08/24/2014] [Accepted: 08/26/2014] [Indexed: 06/03/2023]
Abstract
Brominated flame retardants (BFRs) have been routinely used as additives in a number of consumer products for several decades in order to reduce the risk of fire accidents. Concerns about the massive use of these substances have increased due to their possible toxicity, endocrine disrupting properties and occurrence in almost all the environmental compartments, including humans and wildlife organisms. Several conventional BFRs (e.g. polybrominated diphenylethers (PBDE)) have been included in the list of Persistent Organic Pollutants and their use has been restricted because of their established toxicity and environmental persistence. Over the past few years, these compounds have been replaced with "new" BFRs (NBFRs). Despite the fact that NBFRs are different chemical molecules than traditional BFRs, most of physical-chemical properties (e.g. aromatic moiety, halogen substitution, lipophilic character) are common to both groups; therefore, their fate in the environment is potentially similar to the banned BFRs. Therefore, this article has been compiled to summarize the published scientific data regarding the biodegradability of the most widely used NBFRs, a key factor in their potential persistency in the environment, and their ecotoxicological effects on humans and test organisms. The data reviewed here document that the mechanisms through NBFRs exibit their ecotoxicity and the processes leading to their biotransformation in the environment are still poorly understood. Thus emphasis is placed on the need for further research in these areas is therefore emphasized, in order to avoid the massive use of further potentially harmful and recalcitrant substances of anthropogenic origin.
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Affiliation(s)
- M Ezechiáš
- Laboratory of Environmental Biotechnology, Institute of Microbiology ASCR, v.v.i., Vídeňská 1083, 142 20 Prague, Czech Republic; Institute for Environmental Studies, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague, Czech Republic
| | - S Covino
- Laboratory of Environmental Biotechnology, Institute of Microbiology ASCR, v.v.i., Vídeňská 1083, 142 20 Prague, Czech Republic
| | - T Cajthaml
- Laboratory of Environmental Biotechnology, Institute of Microbiology ASCR, v.v.i., Vídeňská 1083, 142 20 Prague, Czech Republic; Institute for Environmental Studies, Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague, Czech Republic.
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Ortiz R, Párraga M, Navarrete J, Carrasco I, de la Vega E, Ortiz M, Herrera P, Jurgens JA, Held BW, Blanchette RA. Investigations of biodeterioration by fungi in historic wooden churches of Chiloé, Chile. MICROBIAL ECOLOGY 2014; 67:568-575. [PMID: 24407313 DOI: 10.1007/s00248-013-0358-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 12/17/2013] [Indexed: 06/03/2023]
Abstract
The use of wood in construction has had a long history and Chile has a rich cultural heritage of using native woods for building churches and other important structures. In 2000, UNESCO designated a number of the historic churches of Chiloé, built entirely of native woods, as World Heritage Sites. These unique churches were built in the late 1700 s and throughout the 1800 s, and because of their age and exposure to the environment, they have been found to have serious deterioration problems. Efforts are underway to better understand these decay processes and to carryout conservation efforts for the long-term preservation of these important structures. This study characterized the types of degradation taking place and identified the wood decay fungi obtained from eight historic churches in Chiloé, seven of them designated as UNESCO World Heritage sites. Micromorphological observations identified white, brown and soft rot in the structural woods and isolations provided pure cultures of fungi that were identified by sequencing of the internal transcribed region of rDNA. Twenty-nine Basidiomycota and 18 Ascomycota were found. These diverse groups of fungi represent several genera and species not previously reported from Chile and demonstrates a varied microflora is causing decay in these historic buildings.
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Affiliation(s)
- Rodrigo Ortiz
- Escuela de Construcción Civil, Facultad de Ingeniería, Universidad de Valparaíso, Blanco 951, Valparaíso, Chile
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12
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White rot Basidiomycetes isolated from Chiloé National Park in Los Lagos region, Chile. Antonie van Leeuwenhoek 2013; 104:1193-203. [PMID: 24068453 DOI: 10.1007/s10482-013-0041-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Accepted: 09/19/2013] [Indexed: 10/26/2022]
Abstract
Wood decomposition is an important component in forest ecosystems but information about the diversity of fungi causing decay is lacking. This is especially true for the temperate rain forests in Chile. These investigations show results of a biodiversity study of white-rot fungi in wood obtained from Chiloé National Park in Los Lagos region, Chile. Culturing from white-rotted wood followed by sequencing of the complete internal transcribed spacer region of the ribosomal DNA (rDNA) or partial large subunit region of the rDNA, identified 12 different species in the Basidiomycota. All of these fungi were characterized as white rot fungi and were identified with a BLAST match of 97 % or greater to sequences in the GenBank database. Fungi obtained were species of Phlebia, Mycoacia, Hyphodontia, Bjerkandera, Phanerochaete, Stereum, Trametes, and Ceriporiopsis. This report identifies for the first time in Chile the species Ceriporiopsis subvermispora, Hyphodontia radula, Phlebia radiata, Phanerochaete affinis, Peniophora cinerea, Stereum gausapatum, Phlebia setulosa and Phanerochaete sordida. Scanning electron microscopy was used to characterize the type of decay caused by the fungi that were isolated and a combination of selective lignin degraders and simultaneous white rot fungi were found. Fungi that cause a selective degradation of lignin are of interest for bioprocessing technologies that require modification or degradation of lignin without cellulose removal.
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Biodegradation of 4-bromophenol by Arthrobacter chlorophenolicus A6T in a newly designed packed bed reactor. J Biosci Bioeng 2013; 115:182-8. [DOI: 10.1016/j.jbiosc.2012.09.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Revised: 08/09/2012] [Accepted: 09/01/2012] [Indexed: 11/17/2022]
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14
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Zu L, Li G, An T, Wong PK. Biodegradation kinetics and mechanism of 2,4,6-tribromophenol by Bacillus sp. GZT: a phenomenon of xenobiotic methylation during debromination. BIORESOURCE TECHNOLOGY 2012; 110:153-159. [PMID: 22357290 DOI: 10.1016/j.biortech.2012.01.131] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Revised: 01/23/2012] [Accepted: 01/24/2012] [Indexed: 05/31/2023]
Abstract
A strain Bacillus sp. GZT capable of debrominating and mineralizing 2,4,6-tribromophenol (TBP) was isolated and characterized by morphological observation, biochemical and physiological identification as well as 16S rRNA sequence analysis. Biodegradation kinetics experiments demonstrated that initial TBP concentration had a predominant effect on degradation efficiency. Within 120h, the highest TBP degradation and debromination efficiencies were up to 93.2% and 89.3%, respectively, under the optimum condition. Ten metabolic intermediates including five brominated compounds, three oxidative products and two cellular metabolites were all identified by gas chromatography-mass spectrometer, and six key intermediates were doubly validated by authentic standards. The proposed biodegradation mechanism inferred that reductive debromination as a major degradation pathway could simultaneously take place at ortho- and para-positions on TBP, while methylated debromination was also found as a minor degradation pathway during this process. Within 148h degradation, nearly one-third of 3mg/L TBP could be completely mineralized.
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Affiliation(s)
- Lei Zu
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; Graduate School of Chinese Academy of Sciences, Beijing 100049, China
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Uhnáková B, Petrícková A, Biedermann D, Homolka L, Vejvoda V, Bednár P, Papousková B, Sulc M, Martínková L. Biodegradation of brominated aromatics by cultures and laccase of Trametes versicolor. CHEMOSPHERE 2009; 76:826-832. [PMID: 19443012 DOI: 10.1016/j.chemosphere.2009.04.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2008] [Revised: 03/31/2009] [Accepted: 04/07/2009] [Indexed: 05/27/2023]
Abstract
2-Bromophenol (1), 4-bromophenol (2), 2,4-dibromophenol (3), 2,6-dibromophenol (4), 2,4,6-tribromophenol (5) and tetrabromobisphenol A (6) (1 mM each) added to growing submerged cultures of Trametes versicolor CCBAS 612 were eliminated by 65-85% from the culture medium within 4d. Extracellular laccase activity in the culture medium was influenced by the type of brominated compound added. Maximum level of laccase (63 U L(-1)) was found in the culture with 2-bromophenol. Tetrabromobisphenol A was degraded by a commercial laccase from Trametes versicolor in absence of any oxidation mediator, hydroxylated dibrominated compounds being detected as soluble reaction products by LC/MS. A significant degradation of brominated phenols by laccase was achieved only in the presence of ABTS structural characterization of major products suggesting reaction between bromophenol and ABTS radicals.
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Affiliation(s)
- B Uhnáková
- Institute of Microbiology, Academy of Sciences, 142 20 Prague, Czech Republic.
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Enzymatic characterization of Chilean native wood-rotting fungi for potential use in the bioremediation of polluted environments with chlorophenols. World J Microbiol Biotechnol 2008. [DOI: 10.1007/s11274-008-9810-7] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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