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Martín C, Zervakis GI, Xiong S, Koutrotsios G, Strætkvern KO. Spent substrate from mushroom cultivation: exploitation potential toward various applications and value-added products. Bioengineered 2023; 14:2252138. [PMID: 37670430 PMCID: PMC10484051 DOI: 10.1080/21655979.2023.2252138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 07/28/2023] [Accepted: 08/14/2023] [Indexed: 09/07/2023] Open
Abstract
Spent mushroom substrate (SMS) is the residual biomass generated after harvesting the fruitbodies of edible/medicinal fungi. Disposal of SMS, the main by-product of the mushroom cultivation process, often leads to serious environmental problems and is financially demanding. Efficient recycling and valorization of SMS are crucial for the sustainable development of the mushroom industry in the frame of the circular economy principles. The physical properties and chemical composition of SMS are a solid fundament for developing several applications, and recent literature shows an increasing research interest in exploiting that inherent potential. This review provides a thorough outlook on SMS exploitation possibilities and discusses critically recent findings related to specific applications in plant and mushroom cultivation, animal husbandry, and recovery of enzymes and bioactive compounds.
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Affiliation(s)
- Carlos Martín
- Department of Biotechnology, Inland Norway University of Applied Sciences, Hamar, Norway
- Department of Chemistry, Umeå University, Umeå, Sweden
| | | | - Shaojun Xiong
- Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences, Umeå, Sweden
| | | | - Knut Olav Strætkvern
- Department of Biotechnology, Inland Norway University of Applied Sciences, Hamar, Norway
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Boulaka A, Christodoulou P, Vlassopoulou M, Koutrotsios G, Bekiaris G, Zervakis GI, Mitsou EK, Saxami G, Kyriacou A, Zervou M, Georgiadis P, Pletsa V. Correction: Boulaka et al. Genoprotective Properties and Metabolites of β-Glucan-Rich Edible Mushrooms Following Their In Vitro Fermentation by Human Faecal Microbiota. Molecules 2020, 25, 3554. Molecules 2023; 28:5337. [PMID: 37513492 PMCID: PMC10383226 DOI: 10.3390/molecules28145337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 07/05/2023] [Indexed: 07/30/2023] Open
Abstract
The authors wish to add the following information to the Authors and Affiliation section of our paper published in Molecules [...].
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Affiliation(s)
- Athina Boulaka
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635 Athens, Greece
| | - Paris Christodoulou
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635 Athens, Greece
- Department of Biochemistry and Biotechnology, University of Thessaly, 41500 Larissa, Greece
| | - Marigoula Vlassopoulou
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635 Athens, Greece
- Department of Nutrition and Dietetics, Harokopio University, 17676 Kallithea, Greece
| | - Georgios Koutrotsios
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece
| | - Georgios Bekiaris
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece
| | - Georgios I Zervakis
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece
| | - Evdokia K Mitsou
- Department of Nutrition and Dietetics, Harokopio University, 17676 Kallithea, Greece
| | - Georgia Saxami
- Department of Nutrition and Dietetics, Harokopio University, 17676 Kallithea, Greece
| | - Adamantini Kyriacou
- Department of Nutrition and Dietetics, Harokopio University, 17676 Kallithea, Greece
| | - Maria Zervou
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635 Athens, Greece
| | - Panagiotis Georgiadis
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635 Athens, Greece
| | - Vasiliki Pletsa
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635 Athens, Greece
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Kalntremtziou M, Papaioannou IA, Vangalis V, Polemis E, Pappas KM, Zervakis GI, Typas MA. Evaluation of the lignocellulose degradation potential of Mediterranean forests soil microbial communities through diversity and targeted functional metagenomics. Front Microbiol 2023; 14:1121993. [PMID: 36922966 PMCID: PMC10008878 DOI: 10.3389/fmicb.2023.1121993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 01/31/2023] [Indexed: 02/28/2023] Open
Abstract
The enzymatic arsenal of several soil microorganisms renders them particularly suitable for the degradation of lignocellulose, a process of distinct ecological significance with promising biotechnological implications. In this study, we investigated the spatiotemporal diversity and distribution of bacteria and fungi with 16S and Internally Trascribed Spacer (ITS) ribosomal RNA next-generation-sequencing (NGS), focusing on forest mainland Abies cephalonica and insular Quercus ilex habitats of Greece. We analyzed samples during winter and summer periods, from different soil depths, and we applied optimized and combined targeted meta-omics approaches aiming at the peroxidase-catalase family enzymes to gain insights into the lignocellulose degradation process at the soil microbial community level. The microbial communities recorded showed distinct patterns of response to season, soil depth and vegetation type. Overall, in both forests Proteobacteria, Actinobacteria, Acidobacteria were the most abundant bacteria phyla, while the other phyla and the super-kingdom of Archaea were detected in very low numbers. Members of the orders Agaricales, Russulales, Sebacinales, Gomphales, Geastrales, Hysterangiales, Thelephorales, and Trechisporales (Basidiomycota), and Pezizales, Sordariales, Eurotiales, Pleosporales, Helotiales, and Diaporthales (Ascomycota) were the most abundant for Fungi. By using optimized "universal" PCR primers that targeted the peroxidase-catalase enzyme family, we identified several known and novel sequences from various Basidiomycota, even from taxa appearing at low abundance. The majority of the sequences recovered were manganese peroxidases from several genera of Agaricales, Hysterangiales, Gomphales, Geastrales, Russulales, Hymenochaetales, and Trechisporales, while lignin -and versatile-peroxidases were limited to two to eight species, respectively. Comparisons of the obtained sequences with publicly available data allowed a detailed structural analysis of polymorphisms and functionally relevant amino-acid residues at phylogenetic level. The targeted metagenomics applied here revealed an important role in lignocellulose degradation of hitherto understudied orders of Basidiomycota, such as the Hysterangiales and Gomphales, while it also suggested the auxiliary activity of particular members of Proteobacteria, Actinobacteria, Acidobacteria, Verrucomicrobia, and Gemmatimonadetes. The application of NGS-based metagenomics approaches allows a better understanding of the complex process of lignocellulolysis at the microbial community level as well as the identification of candidate taxa and genes for targeted functional investigations and genetic modifications.
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Affiliation(s)
- Maria Kalntremtziou
- Department of Genetics and Biotechnology, Faculty of Biology, National and Kapodistrian University of Athens, Athens, Greece
| | - Ioannis A Papaioannou
- Zentrum für Molekulare Biologie der Universität Heidelberg, ZMBH, University of Heidelberg, Heidelberg, Germany
| | - Vasileios Vangalis
- Department of Genetics and Biotechnology, Faculty of Biology, National and Kapodistrian University of Athens, Athens, Greece
| | - Elias Polemis
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Athens, Greece
| | - Katherine M Pappas
- Department of Genetics and Biotechnology, Faculty of Biology, National and Kapodistrian University of Athens, Athens, Greece
| | - Georgios I Zervakis
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Athens, Greece
| | - Milton A Typas
- Department of Genetics and Biotechnology, Faculty of Biology, National and Kapodistrian University of Athens, Athens, Greece
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Zerva A, Siaperas R, Taxeidis G, Kyriakidi M, Vouyiouka S, Zervakis GI, Topakas E. Investigation of Abortiporus biennis lignocellulolytic toolbox, and the role of laccases in polystyrene degradation. Chemosphere 2023; 312:137338. [PMID: 36423718 DOI: 10.1016/j.chemosphere.2022.137338] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/15/2022] [Accepted: 11/18/2022] [Indexed: 06/16/2023]
Abstract
White-rot basidiomycetes are the only microorganisms able to produce both hydrolytic (cellulases and hemicellulases) and oxidative (ligninolytic) enzymes for degrading all lignocellulose constituents. Their enzymatic machinery makes them ideal for the discovery of novel enzymes with desirable properties. In the present work, Abortiporus biennis, a white-rot fungus, was studied in regard to its lignocellulolytic potential. Secretomics and biochemical analyses were employed to study the strain's enzymatic arsenal, after growth in corn stover cultures and xylose-based defined media. The results revealed the presence of all the necessary enzymatic activities for complete breakdown of biomass, while the prominent role of oxidative enzymes in the lignocellulolytic strategy of the strain became evident. Two novel laccases, AbiLac1 and AbiLac2, were isolated from the culture supernatant with ion-exchange chromatography. Characterization of purified laccases revealed their ability to oxidize a wide variety of phenolic and non-phenolic substrates. AbiLac1 was found to oxidize polystyrene powder, showing high depolymerization potential, based on radical chain scission mechanism as evidenced by molecular weight decrease. The results of the present study demonstrate the biotechnological potential of the unexplored enzymatic machinery of white-rot basidiomycetes, including the design of improved lignocellulolytic cocktails, as well as the degradation and/or valorization of plastic waste materials.
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Affiliation(s)
- Anastasia Zerva
- Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 5 Iroon Polytechniou Str., Zografou Campus, Athens, 15772, Greece
| | - Romanos Siaperas
- Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 5 Iroon Polytechniou Str., Zografou Campus, Athens, 15772, Greece
| | - George Taxeidis
- Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 5 Iroon Polytechniou Str., Zografou Campus, Athens, 15772, Greece
| | - Maria Kyriakidi
- Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 5 Iroon Polytechniou Str., Zografou Campus, Athens, 15772, Greece
| | - Stamatina Vouyiouka
- Laboratory of Polymer Technology, School of Chemical Engineering, National Technical University of Athens, 5 Iroon Polytechniou Str., Zografou Campus, Athens, 15772, Greece
| | - Georgios I Zervakis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855, Athens, Greece
| | - Evangelos Topakas
- Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 5 Iroon Polytechniou Str., Zografou Campus, Athens, 15772, Greece.
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Boulaka A, Mantellou P, Stanc GM, Souka E, Valavanis C, Saxami G, Mitsou E, Koutrotsios G, Zervakis GI, Kyriacou A, Pletsa V, Georgiadis P. Genoprotective activity of the Pleurotus eryngii mushrooms following their in vitro and in vivo fermentation by fecal microbiota. Front Nutr 2022; 9:988517. [PMID: 36082029 PMCID: PMC9445615 DOI: 10.3389/fnut.2022.988517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 08/08/2022] [Indexed: 11/19/2022] Open
Abstract
Pleurotus eryngii mushrooms are commercially cultivated and widely consumed due to their organoleptic properties, and the low caloric and high nutritional value. In addition, they contain various biologically active and health-promoting compounds; very recently, their genoprotective effect in Caco-2 cells after their fermentation by the human fecal microbiota was also documented. In the current study, the effect of P. eryngii pre- and post-fermentation supernatants in micronuclei formation was evaluated in human lymphocytes. In addition, the genoprotective properties of increasing concentrations of aqueous extracts from P. eryngii mushrooms (150, 300, 600 mg/kg) against the cyclophosphamide-induced DNA damage were studied in young and elderly female and male mice in bone marrow and whole blood cells. The ability of the highest dose (600 mg/kg) to regulate the main cellular signaling pathways was also evaluated in gut and liver tissues of female animals by quantifying the mRNA expression of NrF2, Nfkβ, DNMT1, and IL-22 genes. P. eryngii post-fermentation, but not pre-fermentation, supernatants were able to protect human lymphocytes from the mitomycin C-induced DNA damage in a dose-dependent manner. Similarly, genoprotection was also observed in bone marrow cells of mice treated by gavage with P. eryngii extract. The effect was observed in all the experimental groups of mice (young and elderly, male and female) and was more potent in young female mice. Overexpression of all genes examined was observed in both tissues, mainly among the elderly animals. In conclusion, P. eryngii mushrooms were shown to maintain genome integrity through protecting cells from genotoxic insults. These beneficial effects can be attributed to their antioxidant and immunomodulatory properties, as well as their ability to regulate the cell’s epigenetic mechanisms and maintain cell homeostasis.
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Affiliation(s)
- Athina Boulaka
- Laboratory of Environment and Health, Institute of Chemical Biology, National Hellenic Research Foundation, Athens, Greece
| | - Panagiota Mantellou
- Laboratory of Environment and Health, Institute of Chemical Biology, National Hellenic Research Foundation, Athens, Greece
- Department of Biological Applications and Technology, University of Ioannina, Ioannina, Greece
| | - Gabriela-Monica Stanc
- Department of Pathology, Molecular Pathology Unit, Metaxa Cancer Hospital, Piraeus, Greece
| | - Efthymia Souka
- Department of Pathology, Molecular Pathology Unit, Metaxa Cancer Hospital, Piraeus, Greece
| | - Christoς Valavanis
- Department of Pathology, Molecular Pathology Unit, Metaxa Cancer Hospital, Piraeus, Greece
| | - Georgia Saxami
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | - Evdokia Mitsou
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | - Georgios Koutrotsios
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Athens, Greece
| | - Georgios I. Zervakis
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Athens, Greece
| | | | - Vasiliki Pletsa
- Laboratory of Environment and Health, Institute of Chemical Biology, National Hellenic Research Foundation, Athens, Greece
| | - Panagiotis Georgiadis
- Laboratory of Environment and Health, Institute of Chemical Biology, National Hellenic Research Foundation, Athens, Greece
- *Correspondence: Panagiotis Georgiadis,
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Vlassopoulou M, Paschalidis N, Savvides AL, Saxami G, Mitsou EK, Kerezoudi EN, Koutrotsios G, Zervakis GI, Georgiadis P, Kyriacou A, Pletsa V. Immunomodulating Activity of Pleurotus eryngii Mushrooms Following Their In Vitro Fermentation by Human Fecal Microbiota. J Fungi (Basel) 2022; 8:jof8040329. [PMID: 35448559 PMCID: PMC9028658 DOI: 10.3390/jof8040329] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/17/2022] [Accepted: 03/18/2022] [Indexed: 02/04/2023] Open
Abstract
Recent studies have revealed the crucial role of several edible mushrooms and fungal compounds, mainly polysaccharides, in human health and disease. The investigation of the immunomodulating effects of mushroom polysaccharides, especially β-glucans, and the link between their anticancer and immunomodulatory properties with their possible prebiotic activity on gut micro-organisms has been the subject of intense research over the last decade. We investigated the immunomodulating effects of Pleurotus eryngii mushrooms, selected due to their high β-glucan content, strong lactogenic effect, and potent geno-protective properties, following in vitro fermentation by fecal inocula from healthy elderly volunteers (>60 years old). The immunomodulating properties of the fermentation supernatants (FSs) were initially investigated in U937-derived human macrophages. Gene expression as well as pro- (TNF-α, IL-1β) and anti-inflammatory cytokines (IL-10, IL-1Rα) were assessed and correlated with the fermentation process. The presence of P. eryngii in the fermentation process led to modifications in immune response, as indicated by the altered gene expression and levels of the cytokines examined, a finding consistent for all volunteers. The FSs immunomodulating effect on the volunteers’ peripheral blood mononuclear cells (PBMCs) was verified through the use of cytometry by time of flight (CyTOF) analysis.
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Affiliation(s)
- Marigoula Vlassopoulou
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635 Athens, Greece; (M.V.); (P.G.)
- Department of Nutrition and Dietetics, Harokopio University, 17671 Athens, Greece; (G.S.); (E.K.M.); (E.N.K.); (A.K.)
| | - Nikolaos Paschalidis
- CyTOF Laboratory, Biomedical Research Foundation of the Academy of Athens (BRFAA), 11527 Athens, Greece;
| | - Alexandros L. Savvides
- Microbiology Group, Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, Panepistimioupolis, Zografou, 15781 Athens, Greece;
| | - Georgia Saxami
- Department of Nutrition and Dietetics, Harokopio University, 17671 Athens, Greece; (G.S.); (E.K.M.); (E.N.K.); (A.K.)
| | - Evdokia K. Mitsou
- Department of Nutrition and Dietetics, Harokopio University, 17671 Athens, Greece; (G.S.); (E.K.M.); (E.N.K.); (A.K.)
| | - Evangelia N. Kerezoudi
- Department of Nutrition and Dietetics, Harokopio University, 17671 Athens, Greece; (G.S.); (E.K.M.); (E.N.K.); (A.K.)
- School of Medical Sciences, Örebro University, SE-701 82 Örebro, Sweden
| | - Georgios Koutrotsios
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece; (G.K.); (G.I.Z.)
| | - Georgios I. Zervakis
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece; (G.K.); (G.I.Z.)
| | - Panagiotis Georgiadis
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635 Athens, Greece; (M.V.); (P.G.)
| | - Adamantini Kyriacou
- Department of Nutrition and Dietetics, Harokopio University, 17671 Athens, Greece; (G.S.); (E.K.M.); (E.N.K.); (A.K.)
| | - Vasiliki Pletsa
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635 Athens, Greece; (M.V.); (P.G.)
- Correspondence: ; Tel.: +30-210-727-3754
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Kontogiannatos D, Koutrotsios G, Xekalaki S, Zervakis GI. Biomass and Cordycepin Production by the Medicinal Mushroom Cordyceps militaris-A Review of Various Aspects and Recent Trends towards the Exploitation of a Valuable Fungus. J Fungi (Basel) 2021; 7:jof7110986. [PMID: 34829273 PMCID: PMC8621325 DOI: 10.3390/jof7110986] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 11/14/2021] [Accepted: 11/17/2021] [Indexed: 12/12/2022] Open
Abstract
Cordyceps militaris is an entomopathogenic ascomycete with similar pharmacological importance to that of the wild caterpillar fungus Ophiocordyceps sinensis. C. militaris has attracted significant research and commercial interest due to its content in bioactive compounds beneficial to human health and the relative ease of cultivation under laboratory conditions. However, room for improvement exists in the commercial-scale cultivation of C. militaris and concerns issues principally related to appropriate strain selection, genetic degeneration of cultures, and substrate optimization. In particular, culture degeneration-usually expressed by abnormal fruit body formation and reduced sporulation-results in important economic losses and is holding back investors and potential growers (mainly in Western countries) from further developing this highly promising sector. In the present review, the main factors that influence the generation of biomass and metabolites (with emphasis on cordycepin biosynthesis) by C. militaris are presented and evaluated in conjunction with the use of a wide range of supplements or additives towards the enhancement of fungal productivity in large-scale cultivation processes. Moreover, physiological and genetic factors that increase or reduce the manifestation of strain degeneration in C. militaris are outlined. Finally, methodologies for developing protocols to be used in C. militaris functional biology studies are discussed.
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Kleftaki SA, Simati S, Amerikanou C, Gioxari A, Tzavara C, Zervakis GI, Kalogeropoulos N, Kokkinos A, Kaliora AC. Pleurotus eryngii improves postprandial glycaemia, hunger and fullness perception, and enhances ghrelin suppression in people with metabolically unhealthy obesity. Pharmacol Res 2021; 175:105979. [PMID: 34798266 DOI: 10.1016/j.phrs.2021.105979] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 11/04/2021] [Accepted: 11/09/2021] [Indexed: 11/19/2022]
Abstract
The aim of this study was to examine potential postprandial benefits of Pleurotus eryngii in nineteen volunteers with metabolically unhealthy obesity. An acute, randomized, crossover-designed trial comparing a meal with Pleurotus eryngii and a control meal was performed. The two meals matched in macronutrient and caloric content. Participants consumed both meals in random order after an overnight fast. Blood samples were drawn before and 30, 60, 90, 120, 150 and 180 min after meal consumption (in total 266 samples) to determine glucose, insulin, ghrelin, peptide YY, glucagon-like peptide-1 and glicentin. Visual analog scales measuring the subjective perception of hunger and fullness were completed at the same time points. The test meal resulted in lower glucose incremental area under the curve (iAUC). Additionally, the iAUC of the ghrelin response over time was substantially lower after the test meal (p = 0.033). Lower desire to eat and higher fullness was reflected by significantly lower hunger iAUC (p = 0.046) and higher fullness iAUC (p = 0.042) after the test meal. No differences in insulin, PYY, GLP-1 and glicentin were observed. Pleurotus eryngii can ameliorate postprandial glycaemia, appetite and regulate ghrelin levels at the postprandial state. This effect is attributed to the bioactive polysaccharides that inhibit the activity of enzymes catalysing carbohydrate hydrolysis, cause a delayed gastric emptying and glucose absorption.
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Affiliation(s)
- Stamatia-Angeliki Kleftaki
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, Athens, Greece
| | - Stamatia Simati
- First Department of Propaedeutic Internal Medicine, School of Medicine, Laiko General Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Charalampia Amerikanou
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, Athens, Greece
| | - Aristea Gioxari
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, Athens, Greece
| | - Chara Tzavara
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, Athens, Greece
| | - Georgios I Zervakis
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece
| | - Nick Kalogeropoulos
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, Athens, Greece
| | - Alexander Kokkinos
- First Department of Propaedeutic Internal Medicine, School of Medicine, Laiko General Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Andriana C Kaliora
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University, Athens, Greece.
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Saxami G, Kerezoudi EN, Mitsou EK, Koutrotsios G, Zervakis GI, Pletsa V, Kyriacou A. Fermentation Supernatants of Pleurotus eryngii Mushroom Ameliorate Intestinal Epithelial Barrier Dysfunction in Lipopolysaccharide-Induced Caco-2 Cells via Upregulation of Tight Junctions. Microorganisms 2021; 9:microorganisms9102071. [PMID: 34683391 PMCID: PMC8539016 DOI: 10.3390/microorganisms9102071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/24/2021] [Accepted: 09/28/2021] [Indexed: 11/18/2022] Open
Abstract
In recent years, modulation of gut microbiota through prebiotics has garnered interest as a potential to ameliorate intestinal barrier dysfunction. The aim of the study was to examine the in vitro effect of fermentation supernatants (FSs) from rich in β-glucan Pleurotus eryngii mushrooms on the expression levels of tight junctions (TJs) genes in Caco-2 cells stimulated by bacterial lipopolysaccharides (LPS). Mushrooms were fermented using fecal inocula in an in vitro batch culture model. Caco-2 cells were subjected to LPS and FS treatment under three different conditions: pre-incubation with FS, co- and post-incubation. Reverse transcription PCR was applied to measure the expression levels of zonulin-1, occludin and claudin-1 genes. FSs from P. eryngii mushrooms led to a significant upregulation of the TJs gene expression in pre-incubation state, indicating potential preventive action. Down-regulation of all TJs gene expression levels was observed when the cells were challenged with LPS. The FS negative control (gut microbiota of each donor with no carbohydrate source) exhibited a significant upregulation of TJs expression levels compared to the cells that were challenged with LPS, for all three conditions. Overall, our data highlighted the positive and potential protective effects of P. eryngii mushrooms in upregulation of TJs’ genes.
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Affiliation(s)
- Georgia Saxami
- Department of Nutrition and Dietetics, Harokopio University, 17671 Athens, Greece
| | - Evangelia N Kerezoudi
- Department of Nutrition and Dietetics, Harokopio University, 17671 Athens, Greece
- School of Medical Sciences, Örebro University, SE-701 82 Örebro, Sweden
| | - Evdokia K Mitsou
- Department of Nutrition and Dietetics, Harokopio University, 17671 Athens, Greece
| | - Georgios Koutrotsios
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece
| | - Georgios I Zervakis
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece
| | - Vasiliki Pletsa
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635 Athens, Greece
| | - Adamantini Kyriacou
- Department of Nutrition and Dietetics, Harokopio University, 17671 Athens, Greece
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10
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Koutrotsios G, Tagkouli D, Bekiaris G, Kaliora A, Tsiaka T, Tsiantas K, Chatzipavlidis I, Zoumpoulakis P, Kalogeropoulos N, Zervakis GI. Enhancing the nutritional and functional properties of Pleurotus citrinopileatus mushrooms through the exploitation of winery and olive mill wastes. Food Chem 2021; 370:131022. [PMID: 34520973 DOI: 10.1016/j.foodchem.2021.131022] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 08/25/2021] [Accepted: 08/29/2021] [Indexed: 11/04/2022]
Abstract
Treatment and disposal of wineries and olive-oil mills waste is usually associated with complex processes, which are often of limited wide-scale applicability. Olive-leaves plus two-phase olive mill waste (OLW) or grape marc plus wheat straw (GMW) were assessed as substrates for the cultivation of the choice edible mushroom Pleurotus citrinopileatus. GMW led to increased mushroom biological efficiency and shorter production cycles. Antioxidant activities, triterpenic acids, free amino acids, lovastatin and ergosterol were significantly higher in fruitbodies from GMW; the latter compound was positively correlated with squalene concentrations in substrates. Glucans, resveratrol and fatty acids content showed minor differences among mushrooms from the three substrates examined, whereas ergothioneine was significantly higher in fruitbodies grown on OLW. High correlations were noted for oleanolic, ursolic and amino acid content in mushrooms and their respective substrates. Moreover, FTIR spectra revealed variations in fruitbodies content in bioactive compounds which were associated with the substrates used.
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Affiliation(s)
- Georgios Koutrotsios
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Dimitra Tagkouli
- Harokopio University, Department of Nutrition and Dietetics, Laboratory of Chemistry, Biochemistry and Physical Chemistry of Foods, El. Venizelou 70, 17671 Kallithea, Greece
| | - Georgios Bekiaris
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Andriana Kaliora
- Harokopio University, Department of Nutrition and Dietetics, Laboratory of Chemistry, Biochemistry and Physical Chemistry of Foods, El. Venizelou 70, 17671 Kallithea, Greece
| | - Thalia Tsiaka
- Institute of Chemical Biology, National Hellenic Research Foundation 48, Vas. Constantinou Ave., 11635 Athens, Greece
| | - Konstantinos Tsiantas
- Institute of Chemical Biology, National Hellenic Research Foundation 48, Vas. Constantinou Ave., 11635 Athens, Greece; Department of Food Science and Technology, University of West Attica, Ag. Spyridonos, 12243 Egaleo, Greece
| | - Iordanis Chatzipavlidis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Panagiotis Zoumpoulakis
- Institute of Chemical Biology, National Hellenic Research Foundation 48, Vas. Constantinou Ave., 11635 Athens, Greece; Department of Food Science and Technology, University of West Attica, Ag. Spyridonos, 12243 Egaleo, Greece
| | - Nick Kalogeropoulos
- Harokopio University, Department of Nutrition and Dietetics, Laboratory of Chemistry, Biochemistry and Physical Chemistry of Foods, El. Venizelou 70, 17671 Kallithea, Greece.
| | - Georgios I Zervakis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece.
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Daskalopoulos V, Polemis E, Fryssouli V, Kottis L, Bandini D, Dima B, Zervakis GI. Mallocybe heimii ectomycorrhizae with Cistus creticus and Pinus halepensis in Mediterranean littoral sand dunes - assessment of phylogenetic relationships to M. arenaria and M. agardhii. Mycorrhiza 2021; 31:497-510. [PMID: 34196799 DOI: 10.1007/s00572-021-01038-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 06/02/2021] [Indexed: 06/13/2023]
Abstract
Ectomycorrhizal symbiosis appears extensively in the Northern Hemisphere, where Mediterranean ecosystems constitute an important ecological area of considerable biodiversity value. Littoral sand dunes are among high-risk habitats, and ectomycorrhizal lifestyle contributes significantly to supporting life in such regions. Mallocybe heimii (Bon) Matheny & Esteve-Rav. (Inocybaceae, Basidiomycota) and the very similar M. arenaria (Bon) Matheny & Esteve-Rav. grow in poor, usually sandy soils, in association with angiosperms or gymnosperms. Basidiomata originally identified under these names were collected from littoral sand dunes of Greece, and their morpho-anatomical characteristics were examined in conjunction with material derived from other European regions. Sequences from basidiomata and root tips corresponding to the nuclear rDNA internal transcribed spacer region (ITS) and large subunit (LSU) were obtained and analyzed. Phylogenetic results demonstrated that material identified as M. heimii or M. arenaria form a single well-supported group, while M. agardhii (N. Lund) Matheny & Esteve-Rav. is confirmed to be distinct from M. arenaria (the latter was initially described as a variety of the former, i.e., I. agardhii var. arenaria Bon). A detailed tree of the genus Mallocybe was generated on the basis of concatenated ITS and LSU sequences, and relationships of selected taxa are discussed in the light of morphological and sequence data. In addition, the first morphotype descriptions of M. heimii ectomycorrhizae with Cistus creticus L. and Pinus halepensis Miller are hereby provided. Both morphotypes exhibited the typical characteristics of Inocybe/Mallocybe ectomycorrhizae; however, differences were noted, the most significant being the presence of clamps on mantle hyphae and the type of anastomoses.
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Affiliation(s)
- Vassileios Daskalopoulos
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Elias Polemis
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Vassiliki Fryssouli
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | | | | | - Bálint Dima
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Budapest, Hungary
| | - Georgios I Zervakis
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece.
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12
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Kerezoudi EN, Mitsou EK, Gioti K, Terzi E, Avgousti I, Panagiotou A, Koutrotsios G, Zervakis GI, Mountzouris KC, Tenta R, Kyriacou A. Fermentation of Pleurotus ostreatus and Ganoderma lucidum mushrooms and their extracts by the gut microbiota of healthy and osteopenic women: potential prebiotic effect and impact of mushroom fermentation products on human osteoblasts. Food Funct 2021; 12:1529-1546. [PMID: 33521800 DOI: 10.1039/d0fo02581j] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Recent data have highlighted the role of the gut microbiota and its several metabolites in maintaining bone health. Thus, gut microbiota manipulation, e.g., by prebiotics, might offer a plausible target in the fight against bone degenerative diseases. This study aimed (a) to investigate the in vitro prebiotic potential of Ganoderma lucidum and Pleurotus ostreatus mushrooms in healthy and osteopenic women and (b) to explore the impact of mushroom fermentation products on human osteoblasts. G. lucidum LGAM 9720 and P. ostreatus IK 1123 lyophilized mushroom-powders (2% w/v) and their hot-water extracts (1% w/v) were fermented in a 24 h static batch culture model by using faecal inocula from healthy (n = 3) or osteopenic (n = 3) donors. Gut microbiota analysis (qPCR) and measurement of short chain fatty acids (SCFAs) were performed during fermentation, and 24 h-prebiotic indexes were calculated. Evaluation of the effects of fermentation products on bone metabolism parameters (OPG: osteoprotegerin; and RANKL: receptor activator of nuclear factor kappa B ligand) in osteoblast cultures was also performed. Our data suggest that the origin of the gut microbiota inoculum plays a major role in the viability of osteoblasts. The treatments using P. ostreatus mushroom-powder and G. lucidum mushroom-extract had positive effects based on gut microbiota and SCFA analyses. Both mushrooms exhibited lower RANKL levels compared to controls, whereas their extracts tended to enhance the osteoblastic activity. In conclusion, mushrooms that are rich in beta-glucans may exert beneficial in vitro effects on bone physiology by alterations in the gut microbiota and/or SCFA production.
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Affiliation(s)
| | - Evdokia K Mitsou
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece.
| | - Katerina Gioti
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece.
| | - Eirini Terzi
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece.
| | - Ifigeneia Avgousti
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece.
| | | | - Georgios Koutrotsios
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, Athens, Greece.
| | - Georgios I Zervakis
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, Athens, Greece.
| | | | - Roxane Tenta
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece.
| | - Adamantini Kyriacou
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece.
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13
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Tagkouli D, Bekiaris G, Pantazi S, Anastasopoulou ME, Koutrotsios G, Mallouchos A, Zervakis GI, Kalogeropoulos N. Volatile Profiling of Pleurotus eryngii and Pleurotus ostreatus Mushrooms Cultivated on Agricultural and Agro-Industrial By-Products. Foods 2021; 10:foods10061287. [PMID: 34199818 PMCID: PMC8226524 DOI: 10.3390/foods10061287] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 06/01/2021] [Accepted: 06/02/2021] [Indexed: 01/11/2023] Open
Abstract
The influence of genetic (species, strain) and environmental (substrate) factors on the volatile profiles of eight strains of Pleurotus eryngii and P. ostreatus mushrooms cultivated on wheat straw or substrates enriched with winery or olive oil by products was investigated by headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry (HS-SPME-GC-MS). Selected samples were additionally roasted. More than 50 compounds were determined in fresh mushroom samples, with P. ostreatus presenting higher concentrations but a lower number of volatile compounds compared to P. eryngii. Roasting resulted in partial elimination of volatiles and the formation of pyrazines, Strecker aldehydes and sulfur compounds. Principal component analysis on the data obtained succeeded to discriminate among raw and cooked mushrooms as well as among Pleurotus species and strains, but not among different cultivation substrates. Ketones, alcohols and toluene were mainly responsible for discriminating among P. ostreatus strains while aldehydes and fatty acid methyl esters contributed more at separating P. eryngii strains.
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Affiliation(s)
- Dimitra Tagkouli
- Department of Dietetics-Nutrition, School of Health Science and Education, Harokopio University of Athens, El. Venizelou 70, Kallithea, 176 76 Athens, Greece; (D.T.); (S.P.); (M.E.A.)
| | - Georgios Bekiaris
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; (G.B.); (G.K.); (G.I.Z.)
| | - Stella Pantazi
- Department of Dietetics-Nutrition, School of Health Science and Education, Harokopio University of Athens, El. Venizelou 70, Kallithea, 176 76 Athens, Greece; (D.T.); (S.P.); (M.E.A.)
| | - Maria Eleni Anastasopoulou
- Department of Dietetics-Nutrition, School of Health Science and Education, Harokopio University of Athens, El. Venizelou 70, Kallithea, 176 76 Athens, Greece; (D.T.); (S.P.); (M.E.A.)
| | - Georgios Koutrotsios
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; (G.B.); (G.K.); (G.I.Z.)
| | - Athanasios Mallouchos
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece;
| | - Georgios I. Zervakis
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; (G.B.); (G.K.); (G.I.Z.)
| | - Nick Kalogeropoulos
- Department of Dietetics-Nutrition, School of Health Science and Education, Harokopio University of Athens, El. Venizelou 70, Kallithea, 176 76 Athens, Greece; (D.T.); (S.P.); (M.E.A.)
- Correspondence: ; Tel.: +30-210-954-9251
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14
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Vlassopoulou M, Yannakoulia M, Pletsa V, Zervakis GI, Kyriacou A. Effects of fungal beta-glucans on health - a systematic review of randomized controlled trials. Food Funct 2021; 12:3366-3380. [PMID: 33876798 DOI: 10.1039/d1fo00122a] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
INTRODUCTION Beta-glucans are polysaccharides that exhibit a wide range of biological properties as a result of their varying chemical composition. Like all dietary fibers, they avoid catabolism in the upper gastrointestinal tract, and they reach the large intestine undigested. There, they undergo fermentation by the gut microbiota, a process that has potential beneficial effects for the host. The aim of this systematic review is to assess the effects of consumption of beta-(1 → 3,1 → 6)-d-glucans, naturally found in the cell walls of fungi, on health outcomes. METHODS A comprehensive literature search was performed on PubMed, Cochrane Library and Web of Science to retrieve studies that applied randomized controlled trials (RCTs) to investigate the impact of exclusive oral administration of fungal beta-glucans in any form and at any dosage to healthy subjects or patients. RESULTS Thirty-four RCTs, of the 917 records retrieved in total, met the eligibility criteria and are included in the present review. The sources of fungal beta-glucans were Saccharomyces cerevisiae, Aureobasidium pullulans, Pleurotus ostreatus, Lentinula edodes and Ganoderma lucidum, and the dosage of supplementation ranged from 2.5 to 1000 mg daily for up to 6.5 months. The primary physiological outcome of the majority of the interventions was immunomodulation, which resulted in (a) strengthened immune defense that reduces the incidence and symptoms of cold, flu and other respiratory infections and (b) improvement of allergic symptoms. However, the findings on the induction of immune response alterations were inconsistent at the cellular and molecular levels. Another aspect is psychological wellbeing, as the cohorts that received the polysaccharides of interest reported improvement in their mood states as well as amelioration of overall wellbeing. At the same time, it might also be useful as a complementary agent to patients undergoing cancer therapies. Furthermore, supplements containing beta-(1 → 3,1 → 6)-d-glucan administered to overweight/obese adults might have the potential to decrease comorbid conditions associated with obesity. Notably, no adverse event causally related to glucans was recorded. CONCLUSIONS Supplementation with beta-(1 → 3,1 → 6)-d-glucans is well-tolerated, and health-promoting properties are manifested primarily through the potentiation of the immune system. More studies are required to confirm their additional beneficial effects, to establish the optimal dose, and to reveal the underlying molecular mechanisms.
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Affiliation(s)
- Marigoula Vlassopoulou
- Department of Nutrition and Dietetics, Harokopio University, 70 El. Venizelou Str., Kallithea 176 76, Greece. and Institute of Chemical Biology, National Hellenic Research Foundation, 48 Vas. Constantinou Ave., Athens 116 35, Greece
| | - Mary Yannakoulia
- Department of Nutrition and Dietetics, Harokopio University, 70 El. Venizelou Str., Kallithea 176 76, Greece.
| | - Vasiliki Pletsa
- Institute of Chemical Biology, National Hellenic Research Foundation, 48 Vas. Constantinou Ave., Athens 116 35, Greece
| | - Georgios I Zervakis
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, 75 Iera Odos Str., Athens 118 55, Greece
| | - Adamantini Kyriacou
- Department of Nutrition and Dietetics, Harokopio University, 70 El. Venizelou Str., Kallithea 176 76, Greece.
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15
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Zerva A, Pentari C, Termentzi A, America AHP, Zouraris D, Bhattacharya SK, Karantonis A, Zervakis GI, Topakas E. Discovery of two novel laccase-like multicopper oxidases from Pleurotus citrinopileatus and their application in phenolic oligomer synthesis. Biotechnol Biofuels 2021; 14:83. [PMID: 33794981 PMCID: PMC8017616 DOI: 10.1186/s13068-021-01937-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 03/20/2021] [Indexed: 05/13/2023]
Abstract
BACKGROUND Laccases and laccase-like multicopper oxidases (LMCOs) oxidize a vast array of phenolic compounds and amines, releasing water as a byproduct. Their low substrate specificity is responsible for their tremendous biotechnological interest, since they have been used for numerous applications. However, the laccases characterized so far correspond to only a small fraction of the laccase genes identified in fungal genomes. Therefore, the knowledge regarding the biochemistry and physiological role of minor laccase-like isoforms is still limited. RESULTS In the present work, we describe the isolation, purification and characterization of two novel LMCOs, PcLac1 and PcLac2, from Pleurotus citrinopileatus. Both LMCOs were purified with ion-exchange chromatographic methods. PcLac2 was found to oxidize a broader substrate range than PcLac1, but both LMCOs showed similar formal potentials, lower than those reported previously for laccases from white-rot fungi. Proteomic analysis of both proteins revealed their similarity with other well-characterized laccases from Pleurotus strains. Both LMCOs were applied to the oxidation of ferulic and sinapic acid, yielding oligomers with possible antioxidant activity. CONCLUSIONS Overall, the findings of the present work can offer new insights regarding the biochemistry and variability of low-redox potential laccases of fungal origin. Low-redox potential biocatalysts could offer higher substrate selectivity than their high-redox counterparts, and thus, they could be of applied value in the field of biocatalysis.
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Affiliation(s)
- A Zerva
- Industrial Biotechnology & Biocatalysis Group, Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 5 Iroon Polytechniou Str, Zografou Campus, Athens, Greece
| | - C Pentari
- Industrial Biotechnology & Biocatalysis Group, Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 5 Iroon Polytechniou Str, Zografou Campus, Athens, Greece
| | - A Termentzi
- Department of Ophthalmology/Bascom Palmer Eye Institute, University of Miami, Miami, FL, 33136, USA
| | - A H P America
- Wageningen Plant Research, Wageningen University and Research, Wageningen, The Netherlands
| | - D Zouraris
- Laboratory of Physical Chemistry and Applied Electrochemistry, School of Chemical Engineering, National Technical University of Athens, Zografou, Athens, Greece
| | - S K Bhattacharya
- Department of Ophthalmology/Bascom Palmer Eye Institute, University of Miami, Miami, FL, 33136, USA
| | - A Karantonis
- Laboratory of Physical Chemistry and Applied Electrochemistry, School of Chemical Engineering, National Technical University of Athens, Zografou, Athens, Greece
| | - G I Zervakis
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Athens, Greece
| | - E Topakas
- Industrial Biotechnology & Biocatalysis Group, Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 5 Iroon Polytechniou Str, Zografou Campus, Athens, Greece.
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Gargano ML, Venturella G, Zervakis GI, Calvo R, Ferraro V. Medicinal Mushrooms as Part of the "Third Mission" Activities of Univesities - A Science to Business Initiative Related to Mycotherapy. Int J Med Mushrooms 2021; 22:1237-1242. [PMID: 33463940 DOI: 10.1615/intjmedmushrooms.2020036947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In Italy, the National Agency for the Evaluation of the University System and Research (ANVUR) carries out a systematic evaluation of the "Third Mission" activities of universities and research bodies. In this perspective, universities already engaged in research on medicinal mushrooms and on their potential applications in the industrial sector set the frame for collaboration with large, well-reputed private companies. In Italy, one of the major problems of mycotherapy is related to lack of certification and the dubious origin/identity of mushroom extracts used by the industry. Hence, products deriving from medicinal mushrooms that are in trade do not often meet the required quality criteria. In this paper, a multipartner collaboration is presented, which aims at the bottom to top development of nutraceutical products from Pleurotus mushrooms in agreement to science-to-business (S2B) marketing.
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Affiliation(s)
- Maria Letizia Gargano
- Department of Agricultural and Environmental Sciences, University of Bari "Aldo Moro", Via Amendola, 165/A, I-70126 Bari, Italy; Italian Society of Medicinal Mushrooms, Pisa, Italy
| | - Giuseppe Venturella
- Italian Society of Medicinal Mushrooms, Pisa, Italy; Department of Agricultural, Food and Forest Sciences, University of Palermo, Palermo, Italy
| | - Georgios I Zervakis
- Laboratory of General and Agricultural Microbiology, Department of Agricultural Biotechnology, Agricultural University of Athens Iera Odos 75 11855 Athens, Greece
| | - Roberta Calvo
- Italian Society of Medicinal Mushrooms, Pisa, Italy; Department of Agricultural, Food and Forest Sciences, University of Palermo, Palermo, Italy
| | - Valeria Ferraro
- Italian Society of Medicinal Mushrooms, Pisa, Italy; Department of Agricultural, Food and Forest Sciences, University of Palermo, Palermo, Italy
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17
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Fryssouli V, Zervakis GI, Polemis E, Typas MA. A global meta-analysis of ITS rDNA sequences from material belonging to the genus Ganoderma (Basidiomycota, Polyporales) including new data from selected taxa. MycoKeys 2020; 75:71-143. [PMID: 33304123 PMCID: PMC7723883 DOI: 10.3897/mycokeys.75.59872] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 10/26/2020] [Indexed: 01/16/2023] Open
Abstract
Ganoderma P. Karst. is a cosmopolitan genus of white-rot fungi which comprises species with highly-prized pharmaceutical properties, valuable biotechnological applications and of significant phytopathological interest. However, the status of the taxonomy within the genus is still highly controversial and ambiguous despite the progress made through molecular approaches. A metadata analysis of 3908 nuclear ribosomal internal transcribed spacer (ITS) rDNA sequences obtained from GenBank/ENA/DDBJ and UNITE was performed by targeting sequences annotated as Ganoderma, but also sequences from environmental samples and from material examined for the first time. Ganoderma taxa segregated into five main lineages (Clades A to E). Clade A corresponds to the core of laccate species and includes G. shanxiense and three major well-supported clusters: Cluster A.1 ('G. lucidum sensu lato') consists of taxa from Eurasia and North America, Cluster A.2 of material with worldwide occurrence including G. resinaceum and Cluster A.3 is composed of species originating from all continents except Europe and comprises G. lingzhi. Clade B includes G. applanatum and allied species with a Holarctic distribution. Clade C comprises taxa from Asia and Africa only. Clade D consists of laccate taxa with tropical/subtropical occurrence, while clade E harbours the highest number of non-laccate species with a cosmopolitan distribution. The 92 Ganoderma-associated names, initially used for sequences labelling, correspond to at least 80 taxa. Amongst them, 21 constitute putatively new phylospecies after our application of criteria relevant to the robustness/support of the terminal clades, intra- and interspecific genetic divergence and available biogeographic data. Moreover, several other groups or individual sequences seem to represent distinct taxonomic entities and merit further investigation. A particularly large number of the public sequences was revealed to be insufficiently and/or incorrectly identified, for example, 87% and 78% of entries labelled as G. australe and G. lucidum, respectively. In general, ITS demonstrated high efficacy in resolving relationships amongst most of the Ganoderma taxa; however, it was not equally useful at elucidating species barriers across the entire genus and such cases are outlined. Furthermore, we draw conclusions on biogeography by evaluating species occurrence on a global scale in conjunction with phylogenetic structure/patterns. The sequence variability assessed in ITS spacers could be further exploited for diagnostic purposes.
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Affiliation(s)
- Vassiliki Fryssouli
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Georgios I. Zervakis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Elias Polemis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Milton A. Typas
- National and Kapodistrian University of Athens, Department of Genetics and Biotechnology, Faculty of Biology, Panepistemiopolis, Athens 15701, Greece
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18
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Tagkouli D, Kaliora A, Bekiaris G, Koutrotsios G, Christea M, Zervakis GI, Kalogeropoulos N. Free Amino Acids in Three Pleurotus Species Cultivated on Agricultural and Agro-Industrial By-Products. Molecules 2020; 25:molecules25174015. [PMID: 32887476 PMCID: PMC7504736 DOI: 10.3390/molecules25174015] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 08/28/2020] [Accepted: 08/31/2020] [Indexed: 12/19/2022] Open
Abstract
Previous studies have demonstrated the feasibility of employing by-products of the olive and wine sectors for the production of Pleurotus mushrooms with enhanced functionalities. In this work we investigated the influence of endogenous and exogenous factors on free amino acids (FAAs) profile of Pleurotus ostreatus, P. eryngii and P. nebrodensis mushrooms produced on wheat straw (WS), alone or mixed with grape marc (GM), and on by-products of the olive industry (OL). Overall, 22 FAAs were determined in substrates and mushrooms, including all the essential amino acids, the neurotransmitter γ-aminobutyric acid (GABA) and ornithine. On a dry weight (dw) basis, total FAAs ranged from 17.37 mg/g in P. nebrodensis to 130.12 mg/g in P. ostreatus samples, with alanine, leucine, glutamine, valine and serine predominating. Similar distribution patterns were followed by the monosodium glutamate (MSG)-like, sweet and bitter FAAs. Significant differences in FAAs level were observed among the species examined and among the cultivation substrates used. Principal Component Analysis (PCA) performed on the entire FAAs profile of six Pleurotus strains, clearly separated P. ostreatus from P. eryngii and P. nebrodensis, in accordance to their phylogenetic affinity. This is the first report of FAAs in P. nebrodensis.
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Affiliation(s)
- Dimitra Tagkouli
- Department of Dietetics-Nutrition, School of Health Science and Education, Harokopio University of Athens, El. Venizelou 70, Kallithea, 17676 Athens, Greece; (D.T.); (A.K.); (M.C.)
| | - Andriana Kaliora
- Department of Dietetics-Nutrition, School of Health Science and Education, Harokopio University of Athens, El. Venizelou 70, Kallithea, 17676 Athens, Greece; (D.T.); (A.K.); (M.C.)
| | - Georgios Bekiaris
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; (G.B.); (G.K.)
| | - Georgios Koutrotsios
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; (G.B.); (G.K.)
| | - Margarita Christea
- Department of Dietetics-Nutrition, School of Health Science and Education, Harokopio University of Athens, El. Venizelou 70, Kallithea, 17676 Athens, Greece; (D.T.); (A.K.); (M.C.)
| | - Georgios I. Zervakis
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; (G.B.); (G.K.)
- Correspondence: (G.I.Z.); (N.K.); Tel.: +30-210-5294341 (G.I.Z.); +30-210-9549251 (N.K.)
| | - Nick Kalogeropoulos
- Department of Dietetics-Nutrition, School of Health Science and Education, Harokopio University of Athens, El. Venizelou 70, Kallithea, 17676 Athens, Greece; (D.T.); (A.K.); (M.C.)
- Correspondence: (G.I.Z.); (N.K.); Tel.: +30-210-5294341 (G.I.Z.); +30-210-9549251 (N.K.)
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Mitsou EK, Saxami G, Stamoulou E, Kerezoudi E, Terzi E, Koutrotsios G, Bekiaris G, Zervakis GI, Mountzouris KC, Pletsa V, Kyriacou A. Effects of Rich in Β-Glucans Edible Mushrooms on Aging Gut Microbiota Characteristics: An In Vitro Study. Molecules 2020; 25:E2806. [PMID: 32570735 PMCID: PMC7355846 DOI: 10.3390/molecules25122806] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 06/15/2020] [Accepted: 06/16/2020] [Indexed: 12/21/2022] Open
Abstract
Alterations of gut microbiota are evident during the aging process. Prebiotics may restore the gut microbial balance, with β-glucans emerging as prebiotic candidates. This study aimed to investigate the impact of edible mushrooms rich in β-glucans on the gut microbiota composition and metabolites by using in vitro static batch culture fermentations and fecal inocula from elderly donors (n = 8). Pleurotus ostreatus, P. eryngii, Hericium erinaceus and Cyclocybe cylindracea mushrooms derived from various substrates were examined. Gut microbiota composition (quantitative PCR (qPCR)) and short-chain fatty acids (SCFAs; gas chromatography (GC)) were determined during the 24-h fermentation. P. eryngii induced a strong lactogenic effect, while P. ostreatus and C. cylindracea induced a significant bifidogenic effect (p for all <0.05). Furthermore, P. eryngii produced on wheat straw and the prebiotic inulin had comparable Prebiotic Indexes, while P. eryngii produced on wheat straw/grape marc significantly increased the levels of tested butyrate producers. P. ostreatus, P. eryngii and C. cylindracea had similar trends in SCFA profile; H. erinaceus mushrooms were more diverse, especially in the production of propionate, butyrate and branched SCFAs. In conclusion, mushrooms rich in β-glucans may exert beneficial in vitro effects in gut microbiota and/or SCFAs production in elderly subjects.
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Affiliation(s)
- Evdokia K. Mitsou
- Department of Nutrition and Dietetics, Harokopio University, 17671 Athens, Greece; (E.K.M.); (G.S.); (E.S.); (E.K.); (E.T.)
| | - Georgia Saxami
- Department of Nutrition and Dietetics, Harokopio University, 17671 Athens, Greece; (E.K.M.); (G.S.); (E.S.); (E.K.); (E.T.)
| | - Emmanuela Stamoulou
- Department of Nutrition and Dietetics, Harokopio University, 17671 Athens, Greece; (E.K.M.); (G.S.); (E.S.); (E.K.); (E.T.)
| | - Evangelia Kerezoudi
- Department of Nutrition and Dietetics, Harokopio University, 17671 Athens, Greece; (E.K.M.); (G.S.); (E.S.); (E.K.); (E.T.)
| | - Eirini Terzi
- Department of Nutrition and Dietetics, Harokopio University, 17671 Athens, Greece; (E.K.M.); (G.S.); (E.S.); (E.K.); (E.T.)
| | - Georgios Koutrotsios
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece; (G.K.); (G.B.); (G.I.Z.)
| | - Georgios Bekiaris
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece; (G.K.); (G.B.); (G.I.Z.)
| | - Georgios I. Zervakis
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, 11855 Athens, Greece; (G.K.); (G.B.); (G.I.Z.)
| | | | - Vasiliki Pletsa
- Institute of Chemical Biology, National Hellenic Research Foundation, 11635 Athens, Greece;
| | - Adamantini Kyriacou
- Department of Nutrition and Dietetics, Harokopio University, 17671 Athens, Greece; (E.K.M.); (G.S.); (E.S.); (E.K.); (E.T.)
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20
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Koutrotsios G, Danezis G, Georgiou C, Zervakis GI. Elemental Content in Pleurotus ostreatus and Cyclocybe cylindracea Mushrooms: Correlations with Concentrations in Cultivation Substrates and Effects on the Production Process. Molecules 2020; 25:molecules25092179. [PMID: 32392710 PMCID: PMC7249068 DOI: 10.3390/molecules25092179] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 05/03/2020] [Accepted: 05/05/2020] [Indexed: 01/26/2023] Open
Abstract
Few data exist about the effect of substrates’ elemental content on the respective concentrations in cultivated mushrooms, on the degradation of lignocellulosics or on production parameters. Sixteen elements (14 metals and 2 metalloids) were measured by inductively coupled plasma mass spectrometry (ICP-MS) in Pleurotus ostreatus and Cyclocybe cylindracea mushrooms, and in their seven cultivation substrates composed of various plant-based residues. Results revealed a high variability in elemental concentration among substrates which generally led to significant differences in the respective mushroom contents. High bioconcentration factors (BCFs) were noted for Cd, Cu, Mg and Zn for both species in all substrates. BCF of each element was variously affected by substrates’ pH, crude composition, and p and K content. Significant positive correlations were demonstrated for Cu, Fe, Mn and Li concentrations vs. a decrease of cellulose and hemicellulose in P. ostreatus substrates, and vs. mushrooms’ biological efficiency. In the case of C. cylindracea, Be, Mg and Mn concentrations were positively correlated with the decrease of hemicellulose in substrates, while a significant positive correlation was also recorded vs. mushroom productivity. Finally, it was found that 15% to 35% of the daily dietary needs in Mg, Se and Zn could be covered by mushroom consumption.
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Affiliation(s)
- Georgios Koutrotsios
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece;
| | - Georgios Danezis
- Laboratory of Chemistry, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece;
| | - Constantinos Georgiou
- Laboratory of Chemistry, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece;
- Correspondence: (C.G.); (G.I.Z.)
| | - Georgios I. Zervakis
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece;
- Correspondence: (C.G.); (G.I.Z.)
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Bekiaris G, Tagkouli D, Koutrotsios G, Kalogeropoulos N, Zervakis GI. Pleurotus Mushrooms Content in Glucans and Ergosterol Assessed by ATR-FTIR Spectroscopy and Multivariate Analysis. Foods 2020; 9:foods9040535. [PMID: 32344549 PMCID: PMC7230552 DOI: 10.3390/foods9040535] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/15/2020] [Accepted: 04/19/2020] [Indexed: 02/07/2023] Open
Abstract
Attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy was used to monitor the infrared absorption spectra of 79 mushroom samples from 29 Pleurotus ostreatus, P. eryngii and P. nebrodensis strains cultivated on wheat straw, grape marc and/or by-products of the olive industry. The spectroscopic analysis provided a chemical insight into the mushrooms examined, while qualitative and quantitative differences in regions related to proteins, phenolic compounds and polysaccharides were revealed among the species and substrates studied. Moreover, by using advanced chemometrics, correlations of the recorded mushrooms’ spectra versus their content in glucans and ergosterol, commonly determined through traditional analytical techniques, allowed the development of models predicting such contents with a good predictive power (R2: 0.80–0.84) and accuracy (low root mean square error, low relative error and representative to the predicted compounds spectral regions used for the calibrations). Findings indicate that FTIR spectroscopy could be exploited as a potential process analytical technology tool in the mushroom industry to characterize mushrooms and to assess their content in bioactive compounds.
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Affiliation(s)
- Georgios Bekiaris
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, 11855 Athens, Greece; (G.B.); (G.K.)
| | - Dimitra Tagkouli
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University of Athens, 17676 Athens, Greece; (D.T.); (N.K.)
| | - Georgios Koutrotsios
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, 11855 Athens, Greece; (G.B.); (G.K.)
| | - Nick Kalogeropoulos
- Department of Nutrition and Dietetics, School of Health Science and Education, Harokopio University of Athens, 17676 Athens, Greece; (D.T.); (N.K.)
| | - Georgios I. Zervakis
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, 11855 Athens, Greece; (G.B.); (G.K.)
- Correspondence: ; Tel.: +30-210-529-4341
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Loizides M, Alvarado P, Polemis E, Dimou DM, Zervakis GI, Thines M, Telle S, Konstantinou G, Gube M. Multiple evolutionary origins of sequestrate species in the agaricoid genus Chlorophyllum. Mycologia 2020; 112:400-422. [PMID: 32150520 DOI: 10.1080/00275514.2020.1712179] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Chlorophyllum accommodates lamellate agaricoid species as well as sequestrate angiocarpic taxa, which do not form a monophyletic lineage within the genus. To clarify phylogenetic affinities and delimit species boundaries among sequestrate representatives of the genus, we analyzed historical and contemporary material from a broad geographic range, encompassing North America, southern Africa, eastern Asia, the Greek and Iberian peninsulas, and the Mediterranean islands of Cyprus and Lesvos. Six sequestrate lineages of Chlorophyllum were identified, which appear to have evolved in at least three independent gasteromycetation events. Multigene analysis of the nuc rDNA internal transcribed spacer region ITS1-5.8S-ITS2 (ITS) and portions of the nuc 28S rDNA (28S), RNA polymerase II second largest subunit (rpb2), and translation elongation factor 1-α (tef1) genes revealed the presence of a previously undescribed species, introduced here as Chlorophyllum levantinum, sp. nov. Its sister species C. lusitanicum, previously known only from Spain, is shown to have a wider distribution throughout the Mediterranean basin. A South African collection of Secotium gueinzii, a poorly known taxon described in 1840 and seldom appearing in literature since, was also shown to nest within Chlorophyllum. An epitype for this rare species is designated, Secotium becomes a priority synonym of Chlorophyllum, and nomenclatural implications are discussed. The phylogenetic placement of C. arizonicum is confirmed after successful sequencing of the century-old holotype and an undescribed sister lineage of this species detected. Emended descriptions of sections Chlorophyllum, Endoptychorum, and Sphaerospororum are provided to reflect current results, along with updated descriptions and extensive imagery for all known sequestrate taxa of Chlorophyllum.
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Affiliation(s)
| | | | - Elias Polemis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | | | - Georgios I Zervakis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Marco Thines
- Senckenberg Biodiversity and Climate Research Centre (SBiK-F), Senckenberganlage 25, D-60325 Frankfurt am Main, Germany.,LOEWE Centre for Translational Biodiversity Genomics, Genorg-Voigt-Str. 14-16, D-60325 Frankfurt am Main, Germany.,Institute of Ecology, Evolution and Diversity, Faculty of Biological Sciences, Goethe University, Max-von-Laue-Str. 13, D-60486 Frankfurt am Main, Germany
| | - Sabine Telle
- LOEWE Centre for Translational Biodiversity Genomics, Genorg-Voigt-Str. 14-16, D-60325 Frankfurt am Main, Germany
| | | | - Matthias Gube
- Institute of Microbiology, Friedrich Schiller University Jena, Neugasse 25, 07743 Jena, Germany.,Soil Science of Temperate Ecosystems, Georg August University Göttingen, Büsgenweg 2, 37077 Göttingen, Germany
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23
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Kokkoris V, Massas I, Polemis E, Koutrotsios G, Zervakis GI. Accumulation of heavy metals by wild edible mushrooms with respect to soil substrates in the Athens metropolitan area (Greece). Sci Total Environ 2019; 685:280-296. [PMID: 31176215 DOI: 10.1016/j.scitotenv.2019.05.447] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 05/28/2019] [Accepted: 05/29/2019] [Indexed: 05/27/2023]
Abstract
Six wild edible mushroom species, Agaricus bisporus, A. bitorquis, A. gennadii, Coprinus comatus, Psathyrella candolleana and Volvopluteus gloiocephalus, were collected from the Greater Athens area (Greece), together with their soil substrates (two depth-layers) for studying bioaccumulation of heavy metals in a densely populated urban environment. Total and bioavailable Cr, Cu, Fe, Mn, Ni, Pb and Zn concentrations in soils were assessed along with their respective concentrations in mushrooms, and were evaluated in conjunction with soil properties, including K, P and Na content, CaCO3 equivalent percentage, mechanical composition, pH and organic matter. In particular, Cu, Pb, Zn and Ni displayed a high variability in their total and bioavailable concentrations measured in the upper soil layer. Relatively high Pb and Ni contents were measured in mushrooms, while Cu, Zn, Fe and Mn concentrations varied considerably. No significant correlations were detected between total concentrations of heavy metals in soils and mushrooms, whereas bioavailable fractions for several metals were significantly correlated with their respective content in A. bisporus, C. comatus, P. candolleana and V. gloiocephalus. K, Na and P concentrations in soils were associated to the content of several metals in fruit-bodies. The effect of soil texture on metals accumulation by mushrooms was species-dependent since high correlations were found for V. gloiocephalus and C. comatus only. Interactions between metals content in fruit-bodies seem to be species-specific except for Ni vs. Fe and Mn vs. Fe, which are positively correlated in all cases. Overaccumulation of metals in fruit-bodies was established only in respect to the bioavailable fractions of Cu, Mn, Zn and Ni in soil. The levels of toxicity for Pb were exceeded in mushrooms of five species, whereas the rest of the heavy metals (with the exception of Cu) were detected at lower contents than their recommended dietary allowances or tolerable upper intake levels.
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Affiliation(s)
- Vasilis Kokkoris
- Agricultural University of Athens, Laboratory of Soil Science and Agricultural Chemistry, Iera Odos 75, 11855 Athens, Greece; Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Ioannis Massas
- Agricultural University of Athens, Laboratory of Soil Science and Agricultural Chemistry, Iera Odos 75, 11855 Athens, Greece
| | - Elias Polemis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Georgios Koutrotsios
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Georgios I Zervakis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece.
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Manthou E, Tarlak F, Lianou A, Ozdemir M, Zervakis GI, Panagou EZ, Nychas GJE. Prediction of indigenous Pseudomonas spp. growth on oyster mushrooms (Pleurotus ostreatus) as a function of storage temperature. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.05.062] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Sakellari A, Karavoltsos S, Tagkouli D, Rizou C, Sinanoglou VJ, Zoumpoulakis P, Koutrotsios G, Zervakis GI, Kalogeropoulos N. Trace Elements in Pleurotus Ostreatus, P. Eryngii, and P. Nebrodensis Mushrooms Cultivated on Various Agricultural By-Products. ANAL LETT 2019. [DOI: 10.1080/00032719.2019.1594865] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Aikaterini Sakellari
- Laboratory of Environmental Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Sotirios Karavoltsos
- Laboratory of Environmental Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Dimitra Tagkouli
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | - Christiana Rizou
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | | | - Panagiotis Zoumpoulakis
- Institute of Biology, Medicinal Chemistry, and Biotechnology, National Hellenic Research Foundation, Athens, Greece
| | - Georgios Koutrotsios
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Athens, Greece
| | - Georgios I. Zervakis
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Athens, Greece
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26
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Polemis E, Konstantinidis G, Fryssouli V, Slavova M, Tsampazis T, Nakkas V, Assyov B, Kaounas V, Zervakis GI. Tuberpulchrosporum sp. nov., a black truffle of the Aestivum clade (Tuberaceae, Pezizales) from the Balkan peninsula. MycoKeys 2019:35-51. [PMID: 30820166 PMCID: PMC6393397 DOI: 10.3897/mycokeys.47.32085] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 01/07/2019] [Indexed: 11/12/2022] Open
Abstract
Knowledge on the diversity of hypogeous sequestrate ascomycetes is still limited in the Balkan Peninsula. A new species of truffle, Tuberpulchrosporum, is described from Greece and Bulgaria. Specimens were collected from habitats dominated by various oak species (i.e. Quercusilex, Q.coccifera, Q.robur) and other angiosperms. They are morphologically characterised by subglobose, ovoid to irregularly lobed, yellowish-brown to dark brown ascomata, usually with a shallow basal cavity and surface with fissures and small, dense, almost flat, trihedral to polyhedral warts. Ascospores are ellipsoid to subfusiform, uniquely ornamented, crested to incompletely reticulate and are produced in (1-)2-8-spored asci. Hair-like, hyaline to light yellow hyphae protrude from the peridium surface. According to the outcome of ITS rDNA sequence analysis, this species forms a distinct well-supported group in the Aestivum clade, with T.panniferum being the closest phylogenetic taxon.
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Affiliation(s)
- Elias Polemis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece Agricultural University of Athens Athens Greece
| | | | - Vassiliki Fryssouli
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece Agricultural University of Athens Athens Greece
| | - Monica Slavova
- 4 Krivolak Street, Sofia, 1000, Bulgaria Unaffiliated Sofia Bulgaria
| | | | - Vasileios Nakkas
- Konstantinou Davaki 218, Neochoropoulo, 45500 Ioannina, Greece Unaffiliated Ioannina Greece
| | - Boris Assyov
- Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 2 Gagarin Str, Sofia, 1113, Bulgaria Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences Sofia Bulgaria
| | - Vasileios Kaounas
- Sokratous 40, 19016 Artemis, Attica, Greece Unaffiliated Artemis Greece
| | - Georgios I Zervakis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece Agricultural University of Athens Athens Greece
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27
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Zervakis GI, Venturella G, Fryssouli V, Inglese P, Polemis E, Gargano ML. Pleurotus opuntiae revisited - An insight to the phylogeny of dimitic Pleurotus species with emphasis on the P. djamor complex. Fungal Biol 2018; 123:188-199. [PMID: 30798874 DOI: 10.1016/j.funbio.2018.12.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Revised: 12/04/2018] [Accepted: 12/20/2018] [Indexed: 10/27/2022]
Abstract
The name Pleurotus opuntiae is indiscriminately used for describing mushrooms with white to off-white to white-grey pilei with short or absent stipe and dimitic hyphal system, which grow on plants of the genera Opuntia, Yucca, Agave, Phytolacca etc. However, the outcome of the present study evidences that this name should be reserved for specimens deriving from the Mediterranean area only; an epitype originating from Italy on Opuntia ficus-indica is designated. Pertinent material was sequenced by using the internal transcribed spacer region (ITS) and found to be phylogenetically related to P. djamor from Kenya and Nigeria, while members of the P. djamor complex from other continents were clearly more distant. Results were further corroborated by examining the large subunit of nuclear ribosomal DNA (LSU) and the second subunit of RNA polymerase II (RPB2). The P. djamor complex shows high intraspecific polymorphism evidenced by sequence divergence and genetic distance values, presents a cosmopolitan distribution and also comprises material initially identified as P. flabellatus, P. opuntiae, P. ostreatoroseus, P. parsonsiae and P. salmoneostramineus. An ITS tree including representative specimens from all major Pleurotus species is provided for the first time and ambiguous taxa are discussed in the context of new findings.
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Affiliation(s)
- Georgios I Zervakis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece.
| | - Giuseppe Venturella
- Department of Agricultural, Food and Forest Sciences, University of Palermo, Viale delle Scienze, Bldg 4, I-90128 Palermo, Italy.
| | - Vassiliki Fryssouli
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Paolo Inglese
- Department of Agricultural, Food and Forest Sciences, University of Palermo, Viale delle Scienze, Bldg 4, I-90128 Palermo, Italy
| | - Elias Polemis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Maria Letizia Gargano
- Department of Earth and Marine Sciences, University of Palermo, Viale delle Scienze, Bldg 5, I-90128 Palermo, Italy
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Koutrotsios G, Danezis GP, Georgiou CA, Zervakis GI. Rare earth elements concentration in mushroom cultivation substrates affects the production process and fruit-bodies content of Pleurotus ostreatus and Cyclocybe cylindracea. J Sci Food Agric 2018; 98:5418-5427. [PMID: 29675903 DOI: 10.1002/jsfa.9085] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 02/24/2018] [Accepted: 04/20/2018] [Indexed: 05/27/2023]
Abstract
BACKGROUND Concentrations of 16 rare earth elements (REEs) and two actinides were determined for the first time both in cultivated mushrooms and in their production substrates by inductively coupled plasma mass spectroscopy. Moreover, the effect of REEs on cultivation parameters and composition of the final product was assessed, together with their potential use for authentication purposes. RESULTS The concentrations of REEs varied greatly among seven cultivation substrates and correlated with measurements in Cyclocybe cylindracea mushrooms; no such correlation was established in Pleurotus ostreatus. Reduction of hemicellulose, cellulose, and lignin in substrates during P. ostreatus cultivation was positively correlated with REE concentrations, which also affected the production performance depending on the species examined. In all cases, a negative correlation was established between bioconcentration factors (BCF) in mushrooms and REE content in substrates, while the effect of substrate composition on BCF values varied according to the element studied. The estimated daily intake values of REEs through mushroom consumption was at much lower levels than those reported as potentially harmful for human health. CONCLUSION The content of REEs in cultivation substrates and in mushrooms revealed that the bioaccumulation of elements differed in each fungus. The nature/origin of substrates seemed to affect the concentration of REEs in mushrooms to a considerable extent. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Georgios Koutrotsios
- Department of Crop Science, Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Athens, Greece
| | - Georgios P Danezis
- Department of Food Science and Human Nutrition, Laboratory of Chemistry, Agricultural University of Athens, Athens, Greece
| | - Constantinos A Georgiou
- Department of Food Science and Human Nutrition, Laboratory of Chemistry, Agricultural University of Athens, Athens, Greece
| | - Georgios I Zervakis
- Department of Crop Science, Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Athens, Greece
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29
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Affiliation(s)
- Georgios I. Zervakis
- National Agricultural Research Foundation, Institute of Kalamata, Lakonikis 85, 24100 Kalamata, Greece
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30
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Koutrotsios G, Kalogeropoulos N, Kaliora AC, Zervakis GI. Toward an Increased Functionality in Oyster ( Pleurotus) Mushrooms Produced on Grape Marc or Olive Mill Wastes Serving as Sources of Bioactive Compounds. J Agric Food Chem 2018; 66:5971-5983. [PMID: 29869500 DOI: 10.1021/acs.jafc.8b01532] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Pleurotus ostreatus, P. eryngii, and P. nebrodensis were cultivated on nonconventional substrates containing grape marc (GMC) or olive mill byproducts (OMB); wheat straw (WHS) served as control. GMC-based media demonstrated equal/better mushroom productivity than WHS for P. eryngii and P. nebrodensis, while the cultivation performance of P. eryngii was improved in OMB-based media. Both GMC and OMB substrates led to large increase of fruit-bodies content in phenolic acids, resveratrol, triterpenic compounds, and ergosterol; in particular, P. eryngii mushrooms presented significantly more total phenolics and exhibited much higher antioxidant activity (2- to 8-fold increase). Furthermore, substrates containing GMC or OMB presented up to 27% increase in mushroom β-glucans. Overall, Pleurotus species responded in a different and mostly substrate-specific manner by selectively absorbing organic compounds. Phenolics and squalene content of substrates correlated very well with mushrooms antioxidant activity and ergosterol, respectively; the same was observed for triterpenics' content of substrates and mushrooms.
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Affiliation(s)
- Georgios Koutrotsios
- Agricultural University of Athens , Laboratory of General and Agricultural Microbiology , Iera Odos 75 , 11855 Athens , Greece
| | - Nick Kalogeropoulos
- Harokopio University , Department of Nutrition and Dietetics, Laboratory of Chemistry, Biochemistry and Physical Chemistry of Foods , El. Venizelou 70 , 17671 Kallithea , Greece
| | - Andriana C Kaliora
- Harokopio University , Department of Nutrition and Dietetics, Laboratory of Chemistry, Biochemistry and Physical Chemistry of Foods , El. Venizelou 70 , 17671 Kallithea , Greece
| | - Georgios I Zervakis
- Agricultural University of Athens , Laboratory of General and Agricultural Microbiology , Iera Odos 75 , 11855 Athens , Greece
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Zerva A, Zervakis GI, Christakopoulos P, Topakas E. Degradation of olive mill wastewater by the induced extracellular ligninolytic enzymes of two wood-rot fungi. J Environ Manage 2017; 203:791-798. [PMID: 26947318 DOI: 10.1016/j.jenvman.2016.02.042] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 02/17/2016] [Accepted: 02/22/2016] [Indexed: 05/25/2023]
Abstract
Olive mill wastewater (OMWW) is a major problem in olive oil - producing countries, due to its high organic load and concentration in phenols that are toxic for marine life, plants and soil microorganisms. In the present study, two mushroom species were tested in regard to their OMWW's oxidative capacity, Pleurotus citrinopileatus LGAM 28684 and Irpex lacteus LGAM 238. OMWW (25% v/v) degradation was investigated for several culture conditions, namely pH, agitation speed, nitrogen-based supplements and their concentration. The selected values were pH 6, agitation rate 150 rpm, 30 g L-1 corn steep liquor as nitrogen source for P. citrinopileatus and 20 g L-1 diammonium tartrate for I. lacteus. The two strains performed well in cultures supplemented with OMWW, generating very high titers of oxidative enzymes and achieving more than 90% color and phenols reduction within a 24 days cultivation period. In addition, the amount of glucans present in the fungal biomass was assessed. Hence, P. citrinopileatus and I. lacteus appear as potent degraders of OMWW with the ability to use the effluent as a substrate for the production of biotechnologically important enzymes and valuable fungal glucans.
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Affiliation(s)
- Anastasia Zerva
- Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 5 Iroon Polytechniou Str., Zografou Campus, Athens 15780, Greece
| | - Georgios I Zervakis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Paul Christakopoulos
- Biochemical and Chemical Process Engineering, Division of Sustainable Process Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, SE-97187 Luleå, Sweden
| | - Evangelos Topakas
- Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 5 Iroon Polytechniou Str., Zografou Campus, Athens 15780, Greece.
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Koutrotsios G, Kalogeropoulos N, Stathopoulos P, Kaliora AC, Zervakis GI. Bioactive compounds and antioxidant activity exhibit high intraspecific variability in Pleurotus ostreatus mushrooms and correlate well with cultivation performance parameters. World J Microbiol Biotechnol 2017; 33:98. [DOI: 10.1007/s11274-017-2262-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 04/05/2017] [Indexed: 01/26/2023]
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El-Gamal R, Nikolaivits E, Zervakis GI, Abdel-Maksoud G, Topakas E, Christakopoulos P. The use of chitosan in protecting wooden artifacts from damage by mold fungi. ELECTRON J BIOTECHN 2016. [DOI: 10.1016/j.ejbt.2016.10.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Koutrotsios G, Larou E, Mountzouris KC, Zervakis GI. Detoxification of Olive Mill Wastewater and Bioconversion of Olive Crop Residues into High-Value-Added Biomass by the Choice Edible Mushroom Hericium erinaceus. Appl Biochem Biotechnol 2016; 180:195-209. [PMID: 27138726 DOI: 10.1007/s12010-016-2093-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 04/20/2016] [Indexed: 10/21/2022]
Abstract
Environmentally acceptable disposal of olive cultivation residues (e.g., olive prunings; olive pruning residues (OLPR)) and olive mill wastes is of paramount importance since they are generated in huge quantities within a short time. Moreover, olive mill wastewater (OMW) or sludge-like effluents ("alperujo"; two-phase olive mill waste (TPOMW)) are highly biotoxic. Hericium erinaceus is a white-rot fungus which produces choice edible mushrooms on substrates rich in lignocellulosics, and its suitability for the treatment of olive by-products was examined for the first time. Fungal growth resulted in a notable reduction of OMW's pollution parameters (i.e., 65 % decolorization, 47 % total phenolic reduction, and 52 % phytotoxicity decrease) and correlated with laccase and manganese peroxidase activities. Solid-state fermentation of various mixtures of OLPR, TPOMW, and beech sawdust (control) by H. erinaceus qualified OLPR in subsequent cultivation experiments, where it exhibited high mushroom yields and biological efficiency (31 %). Analyses of proximate composition and bioactive compound content revealed that mushrooms deriving from OLPR substrates showed significantly higher crude fat, total glucan, β-glucan, total phenolics, and ferric-reducing antioxidant potential values than the control. H. erinaceus demonstrated the potential to detoxify OMW and bioconvert OLPR into high-quality biomass, and hence, this fungus could be successfully exploited for the treatment of such by-products.
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Affiliation(s)
- Georgios Koutrotsios
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Evangelia Larou
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Konstantinos C Mountzouris
- Department of Nutritional Physiology and Feeding, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Georgios I Zervakis
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece.
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Venturella G, Zervakis GI, Polemis E, Gargano ML. Taxonomic Identity, Geographic Distribution, and Commercial Exploitation of the Culinary-Medicinal Mushroom Pleurotus nebrodensis (Basidiomycetes). Int J Med Mushrooms 2016; 18:59-65. [DOI: 10.1615/intjmedmushrooms.v18.i1.70] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Ntougias S, Lapidus A, Copeland A, Reddy TBK, Pati A, Ivanova NN, Markowitz VM, Klenk HP, Woyke T, Fasseas C, Kyrpides NC, Zervakis GI. High-quality permanent draft genome sequence of the extremely osmotolerant diphenol degrading bacterium Halotalea alkalilenta AW-7(T), and emended description of the genus Halotalea. Stand Genomic Sci 2015; 10:52. [PMID: 26380640 PMCID: PMC4572670 DOI: 10.1186/s40793-015-0052-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 07/28/2015] [Indexed: 12/28/2022] Open
Abstract
Members of the genus Halotalea (family Halomonadaceae) are of high significance since they can tolerate the greatest glucose and maltose concentrations ever reported for known bacteria and are involved in the degradation of industrial effluents. Here, the characteristics and the permanent-draft genome sequence and annotation of Halotalea alkalilenta AW-7T are described. The microorganism was sequenced as a part of the Genomic Encyclopedia of Type Strains, Phase I: the one thousand microbial genomes (KMG) project at the DOE Joint Genome Institute, and it is the only strain within the genus Halotalea having its genome sequenced. The genome is 4,467,826 bp long and consists of 40 scaffolds with 64.62 % average GC content. A total of 4,104 genes were predicted, comprising of 4,028 protein-coding and 76 RNA genes. Most protein-coding genes (87.79 %) were assigned to a putative function. Halotalea alkalilenta AW-7T encodes the catechol and protocatechuate degradation to β-ketoadipate via the β-ketoadipate and protocatechuate ortho-cleavage degradation pathway, and it possesses the genetic ability to detoxify fluoroacetate, cyanate and acrylonitrile. An emended description of the genus Halotalea Ntougias et al. 2007 is also provided in order to describe the delayed fermentation ability of the type strain.
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Affiliation(s)
- Spyridon Ntougias
- Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Xanthi, Greece
| | - Alla Lapidus
- Theodosius Dobzhansky Center for Genome Bioinformatics, St. Petersburg State University, St. Petersburg, Russia ; Algorithmic Biology Lab, St. Petersburg Academic University, St. Petersburg, Russia
| | - Alex Copeland
- Department of Energy Joint Genome Institute, Genome Biology Program, Walnut Creek, CA USA
| | - T B K Reddy
- Department of Energy Joint Genome Institute, Genome Biology Program, Walnut Creek, CA USA
| | - Amrita Pati
- Department of Energy Joint Genome Institute, Genome Biology Program, Walnut Creek, CA USA
| | - Natalia N Ivanova
- Department of Energy Joint Genome Institute, Genome Biology Program, Walnut Creek, CA USA
| | - Victor M Markowitz
- Biological Data Management and Technology Center, Lawrence Berkeley National Laboratory, Berkeley, CA USA
| | - Hans-Peter Klenk
- Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Tanja Woyke
- Department of Energy Joint Genome Institute, Genome Biology Program, Walnut Creek, CA USA
| | - Constantinos Fasseas
- Electron Microscopy Laboratory, Agricultural University of Athens, Athens, Greece
| | - Nikos C Kyrpides
- Department of Energy Joint Genome Institute, Genome Biology Program, Walnut Creek, CA USA ; Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Georgios I Zervakis
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Athens, Greece
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Triantafyllou M, Polemis E, Gonou-Zagou Z, Dimou DM, Delivorias P, Zervakis GI. Taxonomic relationships among non-macrocystidiate taxa of Lactarius subg. Russularia from Europe with special reference to species from Greece. Mycol Prog 2015. [DOI: 10.1007/s11557-015-1101-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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38
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Ntougias S, Baldrian P, Ehaliotis C, Nerud F, Merhautová V, Zervakis GI. Olive mill wastewater biodegradation potential of white-rot fungi--Mode of action of fungal culture extracts and effects of ligninolytic enzymes. Bioresour Technol 2015; 189:121-130. [PMID: 25879179 DOI: 10.1016/j.biortech.2015.03.149] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 03/30/2015] [Accepted: 03/31/2015] [Indexed: 06/04/2023]
Abstract
Forty-nine white-rot strains belonging to 38 species of Basidiomycota were evaluated for olive-mill wastewater (OMW) degradation. Almost all fungi caused high total phenolics (>60%) and color (⩽ 70%) reduction, while COD and phytotoxicity decreased to a lesser extent. Culture extracts from selected Agrocybe cylindracea, Inonotus andersonii, Pleurotus ostreatus and Trametes versicolor strains showed non-altered physicochemical and enzymatic activity profiles when applied to raw OMW in the presence or absence of commercial catalase, indicating no interaction of the latter with fungal enzymes and no competition for H2O2. Hydrogen peroxide's addition resulted in drastic OMW's decolorization, with no effect on phenolic content, suggesting that oxidation affects colored components, but not necessarily phenolics. When fungal extracts were heat-treated, no phenolics decrease was observed demonstrating thus their enzymatic rather than physicochemical oxidation. Laccases added to OMW were reversibly inhibited by the effluent's high phenolic load, while peroxidases were stable and active during the entire process.
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Affiliation(s)
- Spyridon Ntougias
- Democritus University of Thrace, Department of Environmental Engineering, Laboratory of Wastewater Management and Treatment Technologies, Vas. Sofias 12, 67100 Xanthi, Greece
| | - Petr Baldrian
- Institute of Microbiology of the ASCR, Videnska 1083, 14220 Prague, Czech Republic
| | - Constantinos Ehaliotis
- Agricultural University of Athens, Laboratory of Soils and Agricultural Chemistry, Iera Odos 75, 11855 Athens, Greece
| | - Frantisek Nerud
- Institute of Microbiology of the ASCR, Videnska 1083, 14220 Prague, Czech Republic
| | - Věra Merhautová
- Institute of Microbiology of the ASCR, Videnska 1083, 14220 Prague, Czech Republic
| | - Georgios I Zervakis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece.
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Zervakis GI, Ntougias S, Gargano ML, Besi MI, Polemis E, Typas MA, Venturella G. A reappraisal of the Pleurotus eryngii complex - new species and taxonomic combinations based on the application of a polyphasic approach, and an identification key to Pleurotus taxa associated with Apiaceae plants. Fungal Biol 2014; 118:814-34. [PMID: 25209640 DOI: 10.1016/j.funbio.2014.07.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2014] [Revised: 06/24/2014] [Accepted: 07/01/2014] [Indexed: 11/30/2022]
Abstract
The Pleurotus eryngii species-complex comprises choice edible mushrooms growing on roots and lower stem residues of Apiaceae (umbellifers) plants. Material deriving from extensive sampling was studied by mating compatibility, morphological and ecological criteria, and through analysis of ITS1-5.8S-ITS2 and IGS1 rRNA sequences. Results revealed that P. eryngii sensu stricto forms a diverse and widely distributed aggregate composed of varieties elaeoselini, eryngii, ferulae, thapsiae, and tingitanus. Pleurotuseryngii subsp. tuoliensis comb. nov. is a phylogenetically sister group to the former growing only on various Ferula species in Asia. The existence of Pleurotusnebrodensis outside of Sicily (i.e., in Greece) is reported for the first time on the basis of molecular data, while P. nebrodensis subsp. fossulatus comb. nov. is a related Asiatic taxon associated with the same plant (Prangos ferulacea). Last, Pleurotusferulaginis sp. nov. grows on Ferulago campestris in northeast Italy, Slovenia and Hungary; it occupies a distinct phylogenetic position accompanied with significant differences in spore size and mating incompatibility versus other Pleurotus populations. Coevolution with umbellifers and host/substrate specificity seem to play key roles in speciation processes within this fungal group. An identification key to the nine Pleurotus taxa growing in association with Apiaceae plants is provided.
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Affiliation(s)
- Georgios I Zervakis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece.
| | - Spyridon Ntougias
- Democritus University of Thrace, Department of Environmental Engineering, Laboratory of Wastewater Management and Treatment Technologies, Vas. Sofias 12, 67100 Xanthi, Greece
| | - Maria Letizia Gargano
- Università di Palermo, Department of Agricultural and Forest Sciences, Viale delle Scienze, 11, 90128 Palermo, Italy
| | - Maria I Besi
- John Innes Centre, Department of Disease and Stress Biology, Colney Lane, Norwich NR4 7UH, UK
| | - Elias Polemis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Milton A Typas
- National and Kapodistrian University of Athens, Department of Genetics and Biotechnology, Faculty of Biology, Panepistemiopolis, Athens 15701, Greece
| | - Giuseppe Venturella
- Università di Palermo, Department of Agricultural and Forest Sciences, Viale delle Scienze, 11, 90128 Palermo, Italy
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Koutrotsios G, Mountzouris KC, Chatzipavlidis I, Zervakis GI. Bioconversion of lignocellulosic residues by Agrocybe cylindracea and Pleurotus ostreatus mushroom fungi--assessment of their effect on the final product and spent substrate properties. Food Chem 2014; 161:127-35. [PMID: 24837930 DOI: 10.1016/j.foodchem.2014.03.121] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 02/27/2014] [Accepted: 03/25/2014] [Indexed: 11/28/2022]
Abstract
Nine agro-industrial and forestry by-products were subjected to solid-state fermentation by Agrocybe cylindracea and Pleurotus ostreatus, and the process and end-products were comparatively evaluated. Grape marc waste plus cotton gin trash was the best performing medium for both fungi, while substrate composition had a marked effect on most cultivation parameters. Biological efficiency was positively correlated with nitrogen, lignin and ash, and negatively with hemicelluloses and carbohydrate content of substrates. Spent substrates demonstrated high reductions in hemicelluloses and cellulose in contrast to lignin; fibre fractions were correlated with nitrogen, fat and ash content of initial materials, while residual mycelial biomass was affected by mushroom productivity. Mushroom proximate analysis revealed significant variations of constituents depending on the substrate. Crude protein and fat were correlated with substrates nitrogen for both species. Alternative cultivation substrates of high potential are proposed, while spent material could be exploited as animal feed due to its upgraded properties.
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Affiliation(s)
- Georgios Koutrotsios
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Konstantinos C Mountzouris
- Agricultural University of Athens, Department of Nutritional Physiology and Feeding, Iera Odos 75, 11855 Athens, Greece
| | - Iordanis Chatzipavlidis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece
| | - Georgios I Zervakis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece.
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Ntougias S, Lapidus A, Han J, Mavromatis K, Pati A, Chen A, Klenk HP, Woyke T, Fasseas C, Kyrpides NC, Zervakis GI. High quality draft genome sequence of Olivibacter sitiensis type strain (AW-6(T)), a diphenol degrader with genes involved in the catechol pathway. Stand Genomic Sci 2014; 9:783-93. [PMID: 25197463 PMCID: PMC4149018 DOI: 10.4056/sigs.5088950] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Olivibacter sitiensis Ntougias et al. 2007 is a member of the family Sphingobacteriaceae, phylum Bacteroidetes. Members of the genus Olivibacter are phylogenetically diverse and of significant interest. They occur in diverse habitats, such as rhizosphere and contaminated soils, viscous wastes, composts, biofilter clean-up facilities on contaminated sites and cave environments, and they are involved in the degradation of complex and toxic compounds. Here we describe the features of O. sitiensis AW-6T, together with the permanent-draft genome sequence and annotation. The organism was sequenced under the Genomic Encyclopedia for Bacteria and Archaea (GEBA) project at the DOE Joint Genome Institute and is the first genome sequence of a species within the genus Olivibacter. The genome is 5,053,571 bp long and is comprised of 110 scaffolds with an average GC content of 44.61%. Of the 4,565 genes predicted, 4,501 were protein-coding genes and 64 were RNA genes. Most protein-coding genes (68.52%) were assigned to a putative function. The identification of 2-keto-4-pentenoate hydratase/2-oxohepta-3-ene-1,7-dioic acid hydratase-coding genes indicates involvement of this organism in the catechol catabolic pathway. In addition, genes encoding for β-1,4-xylanases and β-1,4-xylosidases reveal the xylanolytic action of O. sitiensis.
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Affiliation(s)
- Spyridon Ntougias
- Democritus University of Thrace, Department of Environmental Engineering, Laboratory of Wastewater Management and Treatment Technologies, Xanthi, Greece
| | - Alla Lapidus
- Department of Energy Joint Genome Institute, Genome Biology Program, Walnut Creek, CA, USA
| | - James Han
- Department of Energy Joint Genome Institute, Genome Biology Program, Walnut Creek, CA, USA
| | | | - Amrita Pati
- Department of Energy Joint Genome Institute, Genome Biology Program, Walnut Creek, CA, USA
| | - Amy Chen
- Biological Data Management and Technology Center, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Hans-Peter Klenk
- Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Tanja Woyke
- Department of Energy Joint Genome Institute, Genome Biology Program, Walnut Creek, CA, USA
| | - Constantinos Fasseas
- Agricultural University of Athens, Electron Microscopy Laboratory, Athens, Greece
| | - Nikos C Kyrpides
- Department of Energy Joint Genome Institute, Genome Biology Program, Walnut Creek, CA, USA ; King Abdulaziz University, Jeddah, Saudi Arabia
| | - Georgios I Zervakis
- Agricultural University of Athens, Laboratory of General and Agricultural Microbiology, Athens, Greece
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Ntougias S, Gaitis F, Katsaris P, Skoulika S, Iliopoulos N, Zervakis GI. The effects of olives harvest period and production year on olive mill wastewater properties - evaluation of Pleurotus strains as bioindicators of the effluent's toxicity. Chemosphere 2013; 92:399-405. [PMID: 23399310 DOI: 10.1016/j.chemosphere.2013.01.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 12/19/2012] [Accepted: 01/03/2013] [Indexed: 05/25/2023]
Abstract
Olive mill wastewater (OMW) generated during the oil extraction from Olea europea L. var. koroneiki olives was sampled at the beginning, the middle and the end of the harvesting season for three successive crop production years, and from four olive mills. OMW samples were examined in respect to their physicochemical characteristics, fatty acid composition of the lipid fraction, and adverse effects on biomass production of nine white-rot fungi of the basidiomycetous genus Pleurotus. Total N, nitrogen species, potassium and phosphate concentrations as well as total phenolics content of OMW samples were influenced by the crop year but not from the harvest period (albeit higher values for nitrate, nitrite, phosphate and potassium as well as total phenolics contents were obtained during ripening of olives), whereas protein concentration, total organic carbon and total solids were not significantly affected by the crop year or the harvest period. In addition, fatty acids composition, i.e. nC14:0, nC16:1Δ9cis, nC17:1Δ10cis, nC18:0, nC18:1Δ9cis, nC22:0 and nC24:0 varied significantly during different crop years and harvest periods. Olive fruits maturity and biannual alternate-bearing appear to play key-roles in the fatty acid variation detected in OMW samples. OMW toxicity as evaluated by the mycelium growth of Pleurotus strains was influenced significantly by the phenolic content of OMW samples obtained during three successive crop years; in contrast, the olives harvest period did not affect Pleurotus biomass production. Hence, experimental data indicated that selected Pleurotus strains could serve as bioindicators of OMW toxicity. Development of viable OMW detoxification processes as well as the exploitation of the effluent's fertilizing value are discussed in the light of the above findings.
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Affiliation(s)
- Spyridon Ntougias
- Democritus University of Thrace, Department of Environmental Engineering, Laboratory of Wastewater Management and Treatment Technologies, Vas. Sofias 12, 67100 Xanthi, Greece
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Ntougias S, Baldrian P, Ehaliotis C, Nerud F, Antoniou T, Merhautová V, Zervakis GI. Biodegradation and detoxification of olive mill wastewater by selected strains of the mushroom genera Ganoderma and Pleurotus. Chemosphere 2012; 88:620-6. [PMID: 22480939 DOI: 10.1016/j.chemosphere.2012.03.042] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Revised: 02/28/2012] [Accepted: 03/09/2012] [Indexed: 05/20/2023]
Abstract
Thirty-nine white-rot fungi belonging to nine species of Agaricomycotina (Basidiomycota) were initially screened for their ability to decrease olive-mill wastewater (OMW) phenolics. Four strains of Ganoderma australe, Ganoderma carnosum, Pleurotus eryngii and Pleurotus ostreatus, were selected and further examined for key-aspects of the OMW biodegradation process. Fungal growth in OMW-containing batch cultures resulted in significant decolorization (by 40-46% and 60-65% for Ganoderma and Pleurotus spp. respectively) and reduction of phenolics (by 64-67% and 74-81% for Ganoderma and Pleurotus spp. respectively). COD decrease was less pronounced (12-29%). Cress-seeds germination increased by 30-40% when OMW was treated by Pleurotus strains. Toxicity expressed as inhibition of Aliivibrio fischeri luminescence was reduced in fungal-treated OMW samples by approximately 5-15 times compared to the control. As regards the pertinent enzyme activities, laccase and Mn-independent peroxidase were detected for Ganoderma spp. during the entire incubation period. In contrast, Pleurotus spp. did not exhibit any enzyme activities at early growth stages; instead, high laccase (five times greater than those of Ganoderma spp.) and Mn peroxidases activities were determined at the end of treatment. OMW decolorization by Ganoderma strains was strongly correlated to the reduction of phenolics, whereas P. eryngii laccase activity was correlated with the effluent's decolorization.
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Affiliation(s)
- Spyridon Ntougias
- Democritus University of Thrace, Department of Environmental Engineering, Laboratory of Wastewater Management and Treatment Technologies, Vas. Sofias 12, Xanthi, Greece
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Zervakis GI, Bekiaris G, Tarantilis PΑ, Pappas CS. Rapid strain classification and taxa delimitation within the edible mushroom genus Pleurotus through the use of diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy. Fungal Biol 2012; 116:715-28. [PMID: 22658316 DOI: 10.1016/j.funbio.2012.04.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Revised: 03/28/2012] [Accepted: 04/07/2012] [Indexed: 11/15/2022]
Abstract
Fourier transform infrared (FT-IR) spectroscopy has been successfully applied for the identification of bacteria and yeasts, but only to a limited extent for discriminating specific groups of filamentous fungi. In the frame of this study, 73 strains - from different associated hosts/substrates and geographic regions - representing 16 taxa of the edible mushroom genus Pleurotus (Basidiomycota, Agaricales) were examined through the use of diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy. A binary matrix, elaborated on the basis of presence/absence of specific absorbance peaks combined with cluster analysis, demonstrated that the spectral region 1800-600 cm(-1) permitted clear delimitation of individual strains into Pleurotus species. In addition, closely related species (e.g., Pleurotus ostreatus and Pleurotus pulmonarius) or taxa of the subgenus Coremiopleurotus demonstrated high similarity in their absorbance patterns, whereas genetically distinct entities such as Pleurotus dryinus, Pleurotus djamor, and Pleurotus eryngii provided spectra with noteworthy differences. When specific regions (1800-1700, 1360-1285, 1125-1068, and 950-650 cm(-1)) were evaluated in respect to the absorbance values demonstrated by individual strains, it was evidenced that this methodology could be eventually exploited for the identification of unknown Pleurotus specimens with a stepwise process and with the aid of a dichotomous key developed for this purpose. Moreover, it was shown that the nature of original fungal material examined (mycelium, basidiomata, and basidiospores) had an effect on the outcome of such analyses, and so did the use of different mycelium growth substrates. In conclusion, application of FT-IR spectroscopy provided a fast, reliable, and cost-efficient solution for the classification of pure cultures from closely related mushroom species.
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Affiliation(s)
- Georgios I Zervakis
- Agricultural University of Athens, Department of Agricultural Biotechnology, Laboratory of General and Agricultural Microbiology, Iera Odos 75, 11855 Athens, Greece.
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Ouzounidou G, Ntougias S, Asfi M, Gaitis F, Zervakis GI. Raw and fungal-treated olive-mill wastewater effects on selected parameters of lettuce (Lactuca sativa L.) growth--the role of proline. J Environ Sci Health B 2012; 47:728-35. [PMID: 22560036 DOI: 10.1080/03601234.2012.669326] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Olive-mill wastewater (OMW) constitutes a major agricultural waste stream for which disposal is associated with significant environmental repercussions. No data are available on the effects of biotreated OMW and of the protective role of exogenously provided proline on plant physiology. In the present study, OMW was administered, either raw or previously treated by the white-rot fungus Pleurotus ostreatus, with or without proline amendment, to lettuce plants growing in sterilized sand. Biotreated OMW and proline addition resulted in significant moderation of OMW adverse effects on plant biomass production and ascorbic acid content, while their synergistic action alleviated the severe negative impact on net photosynthetic rate, water use efficiency and photosynthetic activity (Fv/Fo) invoked by the effluent. Moreover, biotreated OMW supplemented with proline, moderated the decrease in chlorophylls exerted by raw OMW, but it did not contribute at restoring carotenoids content. Restoration of plant transpiration was complete when biotreated OMW was used (with or without proline); proline alone mitigated the negative impact of OMW on photosynthetic efficiency (Fv/Fm and Fv'/Fm'). It seems that key photosynthetic parameters could be exploited as suitable evaluators of wastewater-induced plant toxicity, while plant fertigation with biotreated and/or supplemented OMW could be an interesting prospect in valorizing this effluent.
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Affiliation(s)
- Georgia Ouzounidou
- Institute of Food Technology, National Agricultural Research Foundation, Lycovrissi, Greece
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Ntougias S, Kavroulakis N, Papadopoulou KK, Ehaliotis C, Zervakis GI. Characterization of cultivated fungi isolated from grape marc wastes through the use of amplified rDNA restriction analysis and sequencing. J Microbiol 2010; 48:297-306. [PMID: 20571946 DOI: 10.1007/s12275-010-9193-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2009] [Accepted: 04/09/2010] [Indexed: 11/28/2022]
Abstract
Microbial assessment of grape marc wastes, the residual solid by-product of the wine-industry, was performed by identifying phylogenetically the fungal culturable diversity in order to evaluate environmental and disposal safety issues and to discuss ecological considerations of applications on agricultural land. Fungal spores in grape marc were estimated to 4.7 x 10(6) per g dry weight. Fifty six fungal isolates were classified into eight operational taxonomic units (OTUs) following amplified ribosomal DNA restriction analysis (ARDRA) and colony morphology. Based on 18S rRNA gene and 5.8S rRNA gene-ITS sequencing, the isolates representing OTUs #1, #2, #3, and #4, which comprised 44.6%, 26.8%, 12.5%, and 5.3%, respectively, of the number of the total isolates, were identified as Aspergillus fumigatus, Bionectria ochroleuca, Haematonectria haematococca, and Trichosporon mycotoxinivorans. The isolates of OTU#5 demonstrated high phylogenetic affinity with Penicillium spp., while members of OTUs #6 and #7 were closer linked with Geotrichum candidum var. citri-aurantii and Mycocladus corymbifer, respectively (95.4 and 97.9% similarities in respect to their 5.8S rRNA gene-ITS sequences). The OTU#8 with a single isolate was related with Aspergillus strains. It appears that most of the fungal isolates are associated with the initial raw material. Despite the fact that some of the species identified may potentially act as pathogens, measures such as the avoidance of maintaining large and unprocessed quantities of grape marc wastes in premises without adequate aeration, together with its suitable biological treatment (e.g., composting) prior to any agriculture-related application, could eliminate any pertinent health risks.
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Affiliation(s)
- Spyridon Ntougias
- National Agricultural Research Foundation, Institute of Kalamata, Lakonikis 87, 24100, Kalamata, Greece
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Karpouzas DG, Rousidou C, Papadopoulou KK, Bekris F, Zervakis GI, Singh BK, Ehaliotis C. Effect of continuous olive mill wastewater applications, in the presence and absence of nitrogen fertilization, on the structure of rhizosphere-soil fungal communities. FEMS Microbiol Ecol 2009; 70:388-401. [DOI: 10.1111/j.1574-6941.2009.00779.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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Ravash R, Shiran B, Alavi AA, Bayat F, Rajaee S, Zervakis GI. Genetic variability and molecular phylogeny of Pleurotus eryngii species-complex isolates from Iran, and notes on the systematics of Asiatic populations. Mycol Prog 2009. [DOI: 10.1007/s11557-009-0624-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Ntougias S, Zervakis GI, Fasseas C. Halotalea alkalilenta gen. nov., sp. nov., a novel osmotolerant and alkalitolerant bacterium from alkaline olive mill wastes, and emended description of the family Halomonadaceae Franzmann et al. 1989, emend. Dobson and Franzmann 1996. Int J Syst Evol Microbiol 2007; 57:1975-1983. [PMID: 17766858 DOI: 10.1099/ijs.0.65078-0] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A novel Gram-negative, motile, nonsporulating, rod-shaped bacterium isolated from alkaline sludge-like wastes ('alpeorujo' or 'alperujo') of two-phase olive oil extraction is described. The strain, designated AW-7(T), is an obligate aerobe that is halotolerant (tolerating up to 15 % w/v NaCl), sugar-tolerant (tolerating up to 45 % and 60 % w/v (+)-d-glucose and maltose respectively; these are the highest concentrations tolerated by any known members of the Bacteria domain) and alkalitolerant (growing at a broad pH range of 5-11). Strain AW-7(T) is chemo-organotrophic. Ubiquinone-9 was detected in the respiratory chain of strain AW-7(T). The major fatty acids present are C(18 : 1)omega7c, C(16 : 0), C(19 : 0) cyclo omega8c, C(12 : 0) 3-OH and C(16 : 1)omega7c/iso-C(15 : 0) 2-OH. Based on 16S rRNA gene sequence analysis, strain AW-7(T) showed almost equal phylogenetic distances from Zymobacter palmae (95.6 % similarity) and Carnimonas nigrificans (95.4 % similarity). In addition, low DNA-DNA relatedness values were found for strain AW-7(T) against Carnimonas nigrificans CECT 4437(T) (22.5-25.4 %) and Z. palmae DSM 10491(T) (11.9-14.4 %). The DNA G+C content of strain AW-7(T) is 64.4 mol%. Physiological and chemotaxonomic data further confirmed the differentiation of strain AW-7(T) from the genera Zymobacter and Carnimonas. Thus, strain AW-7(T) represents a novel bacterial genus within the family Halomonadaceae, for which the name Halotalea gen. nov. is proposed. Halotalea alkalilenta sp. nov. (type strain AW-7(T)=DSM 17697(T)=CECT 7134(T)) is proposed as the type species of the genus Halotalea gen. nov. A reassignment of the descriptive 16S rRNA signature characteristics of the family Halomonadaceae permitted the placement of the novel genus Halotalea into the family; in contrast, the genus Halovibrio possessed only 12 out of the 18 signature characteristics proposed, and hence it was excluded from the family Halomonadaceae.
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MESH Headings
- Aerobiosis/physiology
- Bacterial Typing Techniques
- Base Composition
- DNA, Bacterial/chemistry
- DNA, Bacterial/genetics
- DNA, Ribosomal/chemistry
- DNA, Ribosomal/genetics
- Fatty Acids/analysis
- Genes, rRNA
- Glucose/metabolism
- Halomonadaceae/classification
- Halomonadaceae/genetics
- Halomonadaceae/isolation & purification
- Halomonadaceae/physiology
- Hydrogen-Ion Concentration
- Industrial Waste
- Models, Molecular
- Molecular Sequence Data
- Nucleic Acid Conformation
- Nucleic Acid Hybridization
- Olea/microbiology
- Organic Chemicals/metabolism
- Osmotic Pressure
- Phylogeny
- Quinones/analysis
- RNA, Bacterial/genetics
- RNA, Ribosomal, 16S/genetics
- Sequence Analysis, DNA
- Sequence Homology, Nucleic Acid
- Sodium Chloride/metabolism
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Affiliation(s)
- Spyridon Ntougias
- National Agricultural Research Foundation, Institute of Kalamata, Lakonikis 87, 24100 Kalamata, Greece
| | - Georgios I Zervakis
- National Agricultural Research Foundation, Institute of Kalamata, Lakonikis 87, 24100 Kalamata, Greece
| | - Constantinos Fasseas
- Agricultural University of Athens, Department of Agricultural Biotechnology, Electron Microscopy Laboratory, Iera Odos 75, 11855 Athens, Greece
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Ntougias S, Fasseas C, Zervakis GI. Olivibacter sitiensis gen. nov., sp. nov., isolated from alkaline olive-oil mill wastes in the region of Sitia, Crete. Int J Syst Evol Microbiol 2007; 57:398-404. [PMID: 17267986 DOI: 10.1099/ijs.0.64561-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A novel, Gram-negative, non-motile, non-sporulating, rod-shaped bacterium isolated from a viscous two-phase olive-oil mill waste ('alpeorujo') is described. The strain, designated AW-6T, is an obligate aerobe, forming irregular, pigmented creamy white colonies. The pH and temperature ranges for growth were pH 5-8 and 5-45 degrees C, with optimal pH and temperature for growth of pH 6-7 and 28-32 degrees C, respectively. Strain AW-6T was chemo-organotrophic and utilized mostly D+ -glucose, protocatechuate and D+ -xylose, followed by L-cysteine, D- -fructose, D+ -galactose, L-histidine, lactose, sorbitol and sucrose. Menaquinone-7 was detected in the respiratory chain of strain AW-6T. The major fatty acids of strain AW-6T were C(16 : 1)omega7c and/or iso-C(15 : 0) 2-OH, iso-C(15 : 0), iso-C(17 : 0) 3-OH and C(16 : 0). The closest phylogenetic relative of strain AW-6T was clone BIti35 (89.7 % 16S rRNA gene sequence similarity), while Sphingobacterium thalpophilum DSM 11723T was the closest recognized relative within the Sphingobacteriaceae (88.2 % similarity). Strain AW-6T showed a low level of DNA-DNA relatedness to S. thalpophilum DSM 11723T (33.8-37.0 %). The DNA G+C content of strain AW-6T was 45.6 mol%. Physiological and chemotaxonomic data further confirmed the distinctiveness of strain AW-6T from members of the genera Sphingobacterium and Pedobacter. Thus, strain AW-6T is considered to represent a novel species of a new genus within the family Sphingobacteriaceae, for which the name Olivibacter sitiensis gen. nov., sp. nov. is proposed. The type strain is AW-6T =DSM 17696T=CECT 7133T).
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MESH Headings
- Aerobiosis
- Amino Acids/metabolism
- Bacterial Typing Techniques
- Bacteroidetes/classification
- Bacteroidetes/cytology
- Bacteroidetes/isolation & purification
- Bacteroidetes/physiology
- Base Composition
- Carbohydrate Metabolism
- DNA, Bacterial/chemistry
- DNA, Bacterial/genetics
- DNA, Ribosomal/chemistry
- DNA, Ribosomal/genetics
- Fatty Acids/analysis
- Fatty Acids/chemistry
- Genes, rRNA
- Greece
- Hydrogen-Ion Concentration
- Industrial Waste
- Molecular Sequence Data
- Movement
- Olive Oil
- Phylogeny
- Pigments, Biological/biosynthesis
- Plant Oils
- Quinones/analysis
- Quinones/chemistry
- RNA, Bacterial/genetics
- RNA, Ribosomal, 16S/genetics
- Spores, Bacterial
- Temperature
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Affiliation(s)
- Spyridon Ntougias
- National Agricultural Research Foundation, Institute of Kalamata, Lakonikis 87, 24100 Kalamata, Greece
| | - Constantinos Fasseas
- Agricultural University of Athens, Department of Agricultural Biotechnology, Electron Microscopy Laboratory, Iera Odos 75, 11855 Athens, Greece
| | - Georgios I Zervakis
- National Agricultural Research Foundation, Institute of Kalamata, Lakonikis 87, 24100 Kalamata, Greece
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