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Palacios SA, Del Canto A, Erazo J, Torres AM. Fusarium cerealis causing Fusarium head blight of durum wheat and its associated mycotoxins. Int J Food Microbiol 2021; 346:109161. [PMID: 33773354 DOI: 10.1016/j.ijfoodmicro.2021.109161] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 02/19/2021] [Accepted: 03/07/2021] [Indexed: 10/21/2022]
Abstract
Fusarium Head Blight (FHB) is a very important fungal disease that affects small grain cereals worldwide. This disease not only causes yield loses but also crops contamination with mycotoxins such as deoxynivalenol (DON) and nivalenol (NIV). Species within the Fusarium graminearum species complex have been described as the main causal agents of this disease, however lately there have been few reports of Fusarium cerealis causing the disease in wheat and barley in different parts of the world. This study evaluated the aggressiveness of F. cerealis to durum wheat cultivars and also mycotoxin production in planta. Moreover, the mycotoxin profile of F. cerealis strains was characterized molecularly and chemically. All durum wheat cultivars showed typical FHB symptoms but the disease severity varied among them in levels up to 66%. In addition, seventeen different compounds were detected in the infected heads including DON, NIV and nivalenol-3-β-d-glucose (NIV3G). NIV was detected in all cultivars and was the most produced mycotoxin with levels ranging from 1.04 to 6.8 mg/kg. On the other hand, the molecular analysis of F. cerealis strains showed that all of them possessed NIV genotype while the chemical assessment showed that the strains were able to produce not only this toxin in vitro but also DON, zearalenone and other twenty-one secondary metabolites. The increasing incidence of F. cerealis and the possible contamination of crops with the mycotoxins that it produces are of great concern for food security and world cereal trade since it has been reported that NIV is more toxic for humans and animals than DON.
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Affiliation(s)
- S A Palacios
- Research Institute on Mycology and Mycotoxicology (IMICO), National Scientific and Technical Research Council - Argentina (CONICET), Universidad Nacional de Rio Cuarto (UNRC), Ruta 36, Km 601, Río Cuarto 5800, Córdoba, Argentina
| | - A Del Canto
- Research Institute on Mycology and Mycotoxicology (IMICO), National Scientific and Technical Research Council - Argentina (CONICET), Universidad Nacional de Rio Cuarto (UNRC), Ruta 36, Km 601, Río Cuarto 5800, Córdoba, Argentina
| | - J Erazo
- Research Institute on Mycology and Mycotoxicology (IMICO), National Scientific and Technical Research Council - Argentina (CONICET), Universidad Nacional de Rio Cuarto (UNRC), Ruta 36, Km 601, Río Cuarto 5800, Córdoba, Argentina
| | - A M Torres
- Research Institute on Mycology and Mycotoxicology (IMICO), National Scientific and Technical Research Council - Argentina (CONICET), Universidad Nacional de Rio Cuarto (UNRC), Ruta 36, Km 601, Río Cuarto 5800, Córdoba, Argentina.
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Villafana RT, Ramdass AC, Rampersad SN. TRI Genotyping and Chemotyping: A Balance of Power. Toxins (Basel) 2020; 12:E64. [PMID: 31973043 PMCID: PMC7076749 DOI: 10.3390/toxins12020064] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 12/13/2019] [Accepted: 12/16/2019] [Indexed: 11/17/2022] Open
Abstract
Fusarium is among the top 10 most economically important plant pathogens in the world. Trichothecenes are the principal mycotoxins produced as secondary metabolites by select species of Fusarium and cause acute and chronic toxicity in animals and humans upon exposure either through consumption and/or contact. There are over 100 trichothecene metabolites and they can occur in a wide range of commodities that form food and feed products. This review discusses strategies to mitigate the risk of mycotoxin production and exposure by examining the Fusarium-trichothecene model. Fundamental to mitigation of risk is knowing the identity of the pathogen. As such, a comparison of current, recommended molecular approaches for sequence-based identification of Fusaria is presented, followed by an analysis of the rationale and methods of trichothecene (TRI) genotyping and chemotyping. This type of information confirms the source and nature of risk. While both are powerful tools for informing regulatory decisions, an assessment of the causes of incongruence between TRI genotyping and chemotyping data must be made. Reconciliation of this discordance will map the way forward in terms of optimization of molecular approaches, which includes data validation and sharing in the form of accessible repositories of genomic data and browsers for querying such data.
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Affiliation(s)
| | | | - Sephra N. Rampersad
- Department of Life Sciences, Faculty of Science and Technology, The University of the West Indies, St. Augustine, Trinidad and Tobago
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3
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Scaglioni PT, de Oliveira Garcia S, Badiale-Furlong E. Inhibition of in vitro trichothecenes production by microalgae phenolic extracts. Food Res Int 2019; 124:175-180. [DOI: 10.1016/j.foodres.2018.07.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 07/02/2018] [Accepted: 07/04/2018] [Indexed: 11/16/2022]
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Selection of Fusarium Trichothecene Toxin Genes for Molecular Detection Depends on TRI Gene Cluster Organization and Gene Function. Toxins (Basel) 2019; 11:toxins11010036. [PMID: 30646506 PMCID: PMC6357111 DOI: 10.3390/toxins11010036] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 12/15/2018] [Accepted: 01/08/2019] [Indexed: 01/07/2023] Open
Abstract
Food security is a global concern. Fusarium are among the most economically important fungal pathogens because they are ubiquitous, disease management remains a challenge, they produce mycotoxins that affect food and feed safety, and trichothecene mycotoxin production can increase the pathogenicity of some Fusarium species depending on the host species. Although trichothecenes may differ in structure by their patterns of hydroxylation or acetylation, these small changes have a significant impact on toxicity and the biological activity of these compounds. Therefore, detecting and identifying which chemotype is present in a given population are important to predicting the specific toxins that may be produced and, therefore, to evaluating the risk of exposure. Due to the challenges of inducing trichothecene production by Fusarium isolates in vitro for subsequent chemical analysis, PCR assays using gene-specific primers, either singly or in combination, designed against specific genes of the trichothecene gene cluster of multiple species of Fusarium have been developed. The establishment of TRI genotypes that potentially correspond to a specific chemotype requires examination of an information and knowledge pipeline whose critical aspects in sequential order are: (i) understanding the TRI gene cluster organization which differs according to Fusarium species under study; (ii) knowledge of the re-arrangements to the core TRI gene cluster over evolutionary time, which also differs according to Fusarium species; (iii) the functions of the TRI genes in the biosynthesis of trichothecene analogs; and (iv) based on (i)⁻(iii), selection of appropriate target TRI gene(s) for primer design in PCR amplification for the Fusarium species under study. This review, therefore, explains this pipeline and its connection to utilizing TRI genotypes as a possible proxy to chemotype designation.
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Arrúa Alvarenga AA, Moura Mendes Arrua J, Cazal Martínez CC, Arrúa Alvarenga PD, Fernández Ríos D, Pérez Estigarribia PE, Kohli MM. Deoxynivalenol screening in wheat‐derived products in Gran Asunción, Paraguay. J Food Saf 2018. [DOI: 10.1111/jfs.12580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
| | - Juliana Moura Mendes Arrua
- Centro Multidisciplinario de Investigaciones Tecnológicas, Dirección General de Investigación Científica y Tecnológica, Universidad Nacional de Asunción San Lorenzo, Paraguay
| | | | | | | | | | - Man Mohan Kohli
- Cámara Paraguaya de Exportadores y Comercializadores de Cereales y Oleaginosas Asunción, Paraguay
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Bilska K, Jurczak S, Kulik T, Ropelewska E, Olszewski J, Żelechowski M, Zapotoczny P. Species Composition and Trichothecene Genotype Profiling of Fusarium Field Isolates Recovered from Wheat in Poland. Toxins (Basel) 2018; 10:E325. [PMID: 30103473 PMCID: PMC6115980 DOI: 10.3390/toxins10080325] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 07/29/2018] [Accepted: 08/07/2018] [Indexed: 12/20/2022] Open
Abstract
Fusarium head blight (FHB) of cereals is the major head disease negatively affecting grain production worldwide. In 2016 and 2017, serious outbreaks of FHB occurred in wheat crops in Poland. In this study, we characterized the diversity of Fusaria responsible for these epidemics using TaqMan assays. From a panel of 463 field isolates collected from wheat, four Fusarium species were identified. The predominant species were F. graminearum s.s. (81%) and, to a lesser extent, F. avenaceum (15%). The emergence of the 15ADON genotype was found ranging from 83% to 87% of the total trichothecene genotypes isolated in 2016 and 2017, respectively. Our results indicate two dramatic shifts within fungal field populations in Poland. The first shift is associated with the displacement of F. culmorum by F. graminearum s.s. The second shift resulted from a loss of nivalenol genotypes. We suggest that an emerging prevalence of F. graminearum s.s. may be linked to boosted maize production, which has increased substantially over the last decade in Poland. To detect variation within Tri core clusters, we compared sequence data from randomly selected field isolates with a panel of strains from geographically diverse origins. We found that the newly emerged 15ADON genotypes do not exhibit a specific pattern of polymorphism enabling their clear differentiation from the other European strains.
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Affiliation(s)
- Katarzyna Bilska
- Department of Botany and Nature Protection, University of Warmia and Mazury in Olsztyn, Plac Łódzki 1, 10-727 Olsztyn, Poland.
| | - Sebastian Jurczak
- Department of Botany and Nature Protection, University of Warmia and Mazury in Olsztyn, Plac Łódzki 1, 10-727 Olsztyn, Poland.
| | - Tomasz Kulik
- Department of Botany and Nature Protection, University of Warmia and Mazury in Olsztyn, Plac Łódzki 1, 10-727 Olsztyn, Poland.
| | - Ewa Ropelewska
- Department of Systems Engineering, Faculty of Engineering, University of Warmia and Mazury in Olsztyn, Heweliusza 14, 10-718 Olsztyn, Poland.
| | - Jacek Olszewski
- Experimental Education Unit, Oczapowskiego 8, 10-719 Olsztyn, Poland.
| | - Maciej Żelechowski
- Department of Botany and Nature Protection, University of Warmia and Mazury in Olsztyn, Plac Łódzki 1, 10-727 Olsztyn, Poland.
| | - Piotr Zapotoczny
- Department of Systems Engineering, Faculty of Engineering, University of Warmia and Mazury in Olsztyn, Heweliusza 14, 10-718 Olsztyn, Poland.
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Beccari G, Colasante V, Tini F, Senatore M, Prodi A, Sulyok M, Covarelli L. Causal agents of Fusarium head blight of durum wheat (Triticum durum Desf.) in central Italy and their in vitro biosynthesis of secondary metabolites. Food Microbiol 2018; 70:17-27. [DOI: 10.1016/j.fm.2017.08.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 08/04/2017] [Accepted: 08/22/2017] [Indexed: 01/09/2023]
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Zhou D, Wang X, Chen G, Sun S, Yang Y, Zhu Z, Duan C. The Major Fusarium Species Causing Maize Ear and Kernel Rot and Their Toxigenicity in Chongqing, China. Toxins (Basel) 2018; 10:E90. [PMID: 29470401 PMCID: PMC5848190 DOI: 10.3390/toxins10020090] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 02/10/2018] [Accepted: 02/16/2018] [Indexed: 11/16/2022] Open
Abstract
Fusarium verticillioides, F. proliferatum, and F. meridionale were identified as the predominant fungi among 116 Fusarium isolates causing maize ear and kernel rot, a destructive disease in Chongqing areas, China. The toxigenic capability and genotype were determined by molecular amplification and toxin assay. The results showed that the key toxigenic gene FUM1 was detected in 47 F. verticillioides and 19 F. proliferatum isolates. Among these, F. verticillioides and F. proliferatum isolates mainly produced fumonisin B₁, ranging from 3.17 to 1566.44, and 97.74 to 11,100.99 µg/g for each gram of dry hyphal weight, with the averages of 263.94 and 3632.88 µg/g, respectively, indicating the F. proliferatum isolates on average produced about an order of magnitude more fumonisins than F. verticillioides did in these areas, in vitro. Only NIV genotype was detected among 16 F. meridionale and three F. asiaticum isolates. Among these, 11 F. meridionale isolates produced NIV, varying from 17.40 to 2597.34 µg/g. ZEA and DON toxins were detected in 11 and 4 F. meridionale isolates, with the toxin production range of 8.35-78.57 and 3.38-33.41 µg/g, respectively. Three F. asiaticum isolates produced almost no mycotoxins, except that one isolate produced a small amount of DON. The findings provide us with insight into the risk of the main pathogenic Fusarium species and a guide for resistance breeding in these areas.
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Affiliation(s)
- Danni Zhou
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Beijing 100081, China.
- College of Plant Protection, Southwest University, Chongqing 400715, China.
| | - Xiaoming Wang
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Beijing 100081, China.
| | - Guokang Chen
- College of Plant Protection, Southwest University, Chongqing 400715, China.
| | - Suli Sun
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Beijing 100081, China.
| | - Yang Yang
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Beijing 100081, China.
- College of Plant Protection, Southwest University, Chongqing 400715, China.
| | - Zhendong Zhu
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Beijing 100081, China.
| | - Canxing Duan
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Beijing 100081, China.
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Aldars-García L, Marín S, Sanchis V, Magan N, Medina A. Assessment of intraspecies variability in fungal growth initiation of Aspergillus flavus and aflatoxin B 1 production under static and changing temperature levels using different initial conidial inoculum levels. Int J Food Microbiol 2018; 272:1-11. [PMID: 29482078 DOI: 10.1016/j.ijfoodmicro.2018.02.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 01/06/2018] [Accepted: 02/11/2018] [Indexed: 11/24/2022]
Abstract
Intraspecies variability in fungal growth and mycotoxin production has important implications for food safety. Using the Bioscreen C we have examined spectrophotometrically intraspecies variability of A. flavus using 10 isolates under different environments, including temperature shifts, in terms of growth and aflatoxin B1 (AFB1) production. Five high and five low AFB1 producers were examined. The study was conducted at 5 isothermal conditions (from 15 to 37 °C) and 4 dynamic scenarios (between 15 and 30 °C). The experiments were carried out in a semisolid YES medium at 0.92 aw and two inoculum levels, 102 and 103 spores/mL. The Time to Detection (TTD) of growth initiation was determined and modelled as a function of temperature through a polynomial equation and the model was used to predict TTD under temperature upshifts conditions using a novel approach. The results obtained in this study have shown that a model can be developed to describe the effect of temperature upshifts on the TTD for all the studied isolates and inoculum levels. Isolate variability increased as the growth conditions became more stressful and with a lower inoculum level. Inoculum level affected the intraspecies variability but not the repeatability of the experiments. In dynamic conditions, isolate responses depended both on the temperature shift and, predominantly, the final temperature level. AFB1 production was highly variable among the isolates and greatly depended on temperature (optimum temperature at 30-35 °C) and inoculum levels, with often higher production with lower inoculum. This suggests that, from an ecological point of view, the potential isolate variability and interaction with dynamic conditions should be taken into account in developing strategies to control growth and predicting mycotoxin risks by mycotoxigenic fungi.
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Affiliation(s)
- Laila Aldars-García
- Food Technology Dept, XaRTA-UTPV, Agrotecnio Center, University of Lleida, Spain.
| | - Sonia Marín
- Food Technology Dept, XaRTA-UTPV, Agrotecnio Center, University of Lleida, Spain.
| | - Vicente Sanchis
- Food Technology Dept, XaRTA-UTPV, Agrotecnio Center, University of Lleida, Spain.
| | - Naresh Magan
- Applied Mycology Group, Environment and AgriFood Theme, Cranfield University, Cranfield, Bedford MK43 0AL, UK.
| | - Angel Medina
- Applied Mycology Group, Environment and AgriFood Theme, Cranfield University, Cranfield, Bedford MK43 0AL, UK.
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10
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Olsen KJK, Rossman A, Andersen B. Metabolite production by species of Stemphylium. Fungal Biol 2018; 122:172-181. [DOI: 10.1016/j.funbio.2017.12.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 12/18/2017] [Accepted: 12/21/2017] [Indexed: 01/03/2023]
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11
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Kulik T, Abarenkov K, Buśko M, Bilska K, van Diepeningen AD, Ostrowska-Kołodziejczak A, Krawczyk K, Brankovics B, Stenglein S, Sawicki J, Perkowski J. ToxGen: an improved reference database for the identification of type B-trichothecene genotypes in Fusarium. PeerJ 2017; 5:e2992. [PMID: 28229023 PMCID: PMC5314956 DOI: 10.7717/peerj.2992] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 01/15/2017] [Indexed: 01/17/2023] Open
Abstract
Type B trichothecenes, which pose a serious hazard to consumer health, occur worldwide in grains. These mycotoxins are produced mainly by three different trichothecene genotypes/chemotypes: 3ADON (3-acetyldeoxynivalenol), 15ADON (15-acetyldeoxynivalenol) and NIV (nivalenol), named after these three major mycotoxin compounds. Correct identification of these genotypes is elementary for all studies relating to population surveys, fungal ecology and mycotoxicology. Trichothecene producers exhibit enormous strain-dependent chemical diversity, which may result in variation in levels of the genotype's determining toxin and in the production of low to high amounts of atypical compounds. New high-throughput DNA-sequencing technologies promise to boost the diagnostics of mycotoxin genotypes. However, this requires a reference database containing a satisfactory taxonomic sampling of sequences showing high correlation to actually produced chemotypes. We believe that one of the most pressing current challenges of such a database is the linking of molecular identification with chemical diversity of the strains, as well as other metadata. In this study, we use the Tri12 gene involved in mycotoxin biosynthesis for identification of Tri genotypes through sequence comparison. Tri12 sequences from a range of geographically diverse fungal strains comprising 22 Fusarium species were stored in the ToxGen database, which covers descriptive and up-to-date annotations such as indication on Tri genotype and chemotype of the strains, chemical diversity, information on trichothecene-inducing host, substrate or media, geographical locality, and most recent taxonomic affiliations. The present initiative bridges the gap between the demands of comprehensive studies on trichothecene producers and the existing nucleotide sequence databases, which lack toxicological and other auxiliary data. We invite researchers working in the fields of fungal taxonomy, epidemiology and mycotoxicology to join the freely available annotation effort.
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Affiliation(s)
- Tomasz Kulik
- Department of Botany and Nature Protection, University of Warmia and Mazury, Olsztyn, Poland
| | | | - Maciej Buśko
- Department of Chemistry, Poznań University of Life Sciences, Poznań, Poland
| | - Katarzyna Bilska
- Department of Botany and Nature Protection, University of Warmia and Mazury, Olsztyn, Poland
| | - Anne D. van Diepeningen
- CBS-KNAW Fungal Biodiversity Centre, Utrecht, Netherlands
- Institute of Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, Netherlands
| | | | - Katarzyna Krawczyk
- Department of Botany and Nature Protection, University of Warmia and Mazury, Olsztyn, Poland
| | - Balázs Brankovics
- CBS-KNAW Fungal Biodiversity Centre, Utrecht, Netherlands
- Institute of Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, Netherlands
| | - Sebastian Stenglein
- Laboratorio de Biología Funcional y Biotecnología (BIOLAB)-CICBA-INBIOTEC, CONICET, Azul, Buenos Aires, Argentina
- Cátedra de Microbiología-Facultad de Agronomía de Azul-UNCPBA, Azul, Buenos Aires, Argentina
| | - Jakub Sawicki
- Department of Botany and Nature Protection, University of Warmia and Mazury, Olsztyn, Poland
- Department of Biology and Ecology, University of Ostrava, Ostrava, Czech Republic
| | - Juliusz Perkowski
- Department of Chemistry, Poznań University of Life Sciences, Poznań, Poland
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Kulik T, Buśko M, Bilska K, Ostrowska-Kołodziejczak A, van Diepeningen AD, Perkowski J, Stenglein S. Depicting the Discrepancy between Tri Genotype and Chemotype on the Basis of Strain CBS 139514 from a Field Population of F. graminearum Sensu Stricto from Argentina. Toxins (Basel) 2016; 8:E330. [PMID: 27845742 PMCID: PMC5127127 DOI: 10.3390/toxins8110330] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 10/31/2016] [Accepted: 11/08/2016] [Indexed: 11/16/2022] Open
Abstract
Recent studies on a field population of F. graminearum sensu stricto from Argentina revealed an atypical panel of strains identified through PCR genotyping as 15ADON genotypes, but producing high levels of 3ADON. Based on representative strain CBS 139514, we asked if the discrepancy between the trichothecene genotype and chemotype might result from an inter-chemotype recombination of the chemotype-determining genes. To answer this, we sequenced the complete core Tri gene cluster (around 30,200 bp) from this strain and compared its sequence to sequence data of typical type B trichothecene genotypes/chemotypes. Sequence alignment showed that CBS 139514 has an identical sequence within the entire core Tri cluster to the 15ADON genotype. The revealed discrepancy underlines the need for using both molecular and chemical methods for reliable characterization of toxigenic strains of Fusarium.
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Affiliation(s)
- Tomasz Kulik
- Department of Botany and Nature Protection, University of Warmia and Mazury in Olsztyn, Plac Łódzki 1, Olsztyn 10-727, Poland.
| | - Maciej Buśko
- Department of Chemistry, Poznań University of Life Sciences, ul. Wojska Polskiego 75, Poznań 60-625, Poland.
| | - Katarzyna Bilska
- Department of Botany and Nature Protection, University of Warmia and Mazury in Olsztyn, Plac Łódzki 1, Olsztyn 10-727, Poland.
| | | | - Anne D van Diepeningen
- CBS-KNAW Fungal Biodiversity Centre, Uppsalalaan 8, Utrecht 3584 CT, The Netherlands.
- Institute of Biodiversity and Ecosystem Dynamics, University of Amsterdam, Science Park 904, Amsterdam 1098 XH, The Netherlands.
| | - Juliusz Perkowski
- Department of Chemistry, Poznań University of Life Sciences, ul. Wojska Polskiego 75, Poznań 60-625, Poland.
| | - Sebastian Stenglein
- Laboratorio de Biología Funcional y Biotecnología (BIOLAB)-Comisión de Investigaciones Científicas de la provincia de Buenos Aires-Instituto de Investigaciones en Biodiversidad y Biotecnología-Consejo Nacional de Investigaciones Científicas y Técnicas (CICBA-INBIOTEC, CONICET), Av. República de Italia 780, Azul 7300, Buenos Aires, Argentina.
- Cátedra de Microbiología-Facultad de Agronomía de Azul-UNCPBA, Av. República de Italia 780, Azul 7300, Buenos Aires, Argentina.
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13
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Buśko M, Stuper K, Jeleń H, Góral T, Chmielewski J, Tyrakowska B, Perkowski J. Comparison of Volatiles Profile and Contents of Trichothecenes Group B, Ergosterol, and ATP of Bread Wheat, Durum Wheat, and Triticale Grain Naturally Contaminated by Mycobiota. FRONTIERS IN PLANT SCIENCE 2016; 7:1243. [PMID: 27597856 PMCID: PMC4992695 DOI: 10.3389/fpls.2016.01243] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 08/04/2016] [Indexed: 06/06/2023]
Abstract
In natural conditions cereals can be infested by pathogenic fungi. These can reduce the grain yield and quality by contamination with mycotoxins which are harmful for plants, animals, and humans. To date, performed studies of the compounds profile have allowed for the distinction of individual species of fungi. The aim of this study was to determine the profile of volatile compounds and trichothecenes of group B, ergosterol, adenosine triphosphate content carried out on a representative sample of 16 genotypes of related cereals: triticale, bread wheat, and durum wheat. Based on an analysis of volatile compounds by means of gas chromatography mass spectrometry and with the use of an electronic nose, volatile profiles for cereals were determined. Differentiation is presented at four levels through discriminant analysis, heatmaps, principal component analysis (PCA), and electronic nose maps. The statistical model was built by subsequent incorporation of chemical groups such as trichothecenes (GC/MS), fungal biomass indicators ergosterol (HPLC) and ATP (luminometric) and volatiles. The results of the discriminatory analyses showed that the volatile metabolites most markedly differentiated grain samples, among which were mainly: lilial, trichodiene, p-xylene. Electronic nose analysis made it possible to completely separate all the analyzed cereals based only on 100 ions from the 50-150 m/z range. The research carried out using chemometric analysis indicated significant differences in the volatile metabolites present in the grain of bread wheat, durum wheat and triticale. The end result of the performed analyses was a complete discrimination of the examined cereals based on the metabolites present in their grain.
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Affiliation(s)
- Maciej Buśko
- Department of Chemistry, Poznań University of Life SciencesPoznan, Poland
| | - Kinga Stuper
- Department of Chemistry, Poznań University of Life SciencesPoznan, Poland
| | - Henryk Jeleń
- Department of Food Science and Nutrition, Poznań University of Life SciencesPoznan, Poland
| | - Tomasz Góral
- Department of Plant Pathology, Plant Breeding and Acclimatization Institute NRIRadzików, Poland
| | - Jarosław Chmielewski
- Department of Instrumental Analysis, Poznań University of EconomicsPoznan, Poland
| | - Bożena Tyrakowska
- Department of Instrumental Analysis, Poznań University of EconomicsPoznan, Poland
| | - Juliusz Perkowski
- Department of Chemistry, Poznań University of Life SciencesPoznan, Poland
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Pasquali M, Cocco E, Guignard C, Hoffmann L. The effect of agmatine on trichothecene type B and zearalenone production in Fusarium graminearum, F. culmorum and F. poae. PeerJ 2016; 4:e1672. [PMID: 26893962 PMCID: PMC4756729 DOI: 10.7717/peerj.1672] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 01/19/2016] [Indexed: 11/20/2022] Open
Abstract
Agmatine and other putrescines are known for being strong inducers of deoxynivalenol (DON) production in Fusarium graminearum. Other important species produce DON and/or other trichothecene type B toxins (3 acetylated DON, 15 acetylated DON, Fusarenon-X, Nivalenol), such as F. culmorum and F. poae. In order to verify whether the mechanism of the regulation of trichothecene type B induction by agmatine is shared by different species of Fusarium, we tested the hypothesis on 19 strains belonging to 3 Fusarium species (F. graminearum, F. culmorum, F. poae) with diverse genetic chemotypes (3ADON, 15ADON, NIV) by measuring trichothecene B toxins such as DON, NIV, Fusarenon-X, 3ADON and 15ADON. Moreover, we tested whether other toxins like zearalenone were also boosted by agmatine. The trichothecene type B boosting effect was observed in the majority of strains (13 out of 19) in all the three species. Representative strains from all three genetic chemotypes were able to boost toxin production after agmatine treatment. We identified the non-responding strains to the agmatine stimulus, which may contribute to deciphering the regulatory mechanisms that link toxin production to agmatine (and, more generally, polyamines).
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Affiliation(s)
- Matias Pasquali
- Department of Environmental Research and Innovation, Luxembourg Institute of Science and Technology (LIST) , Belvaux , Luxembourg
| | - Emmanuelle Cocco
- Department of Environmental Research and Innovation, Luxembourg Institute of Science and Technology (LIST) , Belvaux , Luxembourg
| | - Cédric Guignard
- Department of Environmental Research and Innovation, Luxembourg Institute of Science and Technology (LIST) , Belvaux , Luxembourg
| | - Lucien Hoffmann
- Department of Environmental Research and Innovation, Luxembourg Institute of Science and Technology (LIST) , Belvaux , Luxembourg
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Molecular and mycotoxin characterization of Fusarium graminearum isolates obtained from wheat at a single field in Argentina. Mycol Prog 2015. [DOI: 10.1007/s11557-015-1147-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Del Ponte EM, Spolti P, Ward TJ, Gomes LB, Nicolli CP, Kuhnem PR, Silva CN, Tessmann DJ. Regional and field-specific factors affect the composition of fusarium head blight pathogens in subtropical no-till wheat agroecosystem of Brazil. PHYTOPATHOLOGY 2015; 105:246-254. [PMID: 25121641 DOI: 10.1094/phyto-04-14-0102-r] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A multiyear survey of >200 wheat fields in Paraná (PR) and Rio Grande do Sul (RS) states was conducted to assess the extent and distribution of Fusarium graminearum species complex (FGSC) diversity in the southern Brazilian wheat agroecosystem. Five species and three trichothecene genotypes were found among 671 FGSC isolates from Fusarium head blight (FHB)-infected wheat heads: F. graminearum (83%) of the 15-acetyldeoxynivalenol (15-ADON) genotype, F. meridionale (12.8%) and F. asiaticum (0.4%) of the nivalenol (NIV) genotype, and F. cortaderiae (2.5%) and F. austroamericanum (0.9%) with either the NIV or the 3-ADON genotype. Regional differences in FGSC composition were observed, with F. meridionale and the NIV type being significantly (P<0.001) more prevalent in PR (>28%) than in RS (≤9%). Within RS, F. graminearum was overrepresented in fields below 600 m in elevation and in fields with higher levels of FHB incidence (P<0.05). Species composition was not significantly influenced by previous crop or the stage of grain development at sampling. Habitat-specific differences in FGSC composition were evaluated in three fields by characterizing a total of 189 isolates collected from corn stubble, air above the wheat canopy, and symptomatic wheat kernels. Significant differences in FGSC composition were observed among these habitats (P<0.001). Most strikingly, F. meridionale and F. cortaderiae of the NIV genotype accounted for the vast majority (>96%) of isolates from corn stubble, whereas F. graminearum with the 15-ADON genotype was dominant (>84%) among isolates from diseased wheat kernels. Potential differences in pathogenic fitness on wheat were also suggested by a greenhouse competitiveness assay in which F. graminearum was recovered at much higher frequency (>90%) than F. meridionale from four wheat varieties inoculated with an equal mixture of F. graminearum and F. meridionale isolates. Taken together, the data presented here suggest that FGSC composition and, consequently, the trichothecene contamination in wheat grown in southern Brazil is influenced by host adaptation and pathogenic fitness. Evidence that F. meridionale and F. cortaderiae with the NIV genotype are regionally significant contributors to FHB may have significant implications for food safety and the economics of cereal production.
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Pasquali M, Migheli Q. Genetic approaches to chemotype determination in type B-trichothecene producing Fusaria. Int J Food Microbiol 2014; 189:164-82. [DOI: 10.1016/j.ijfoodmicro.2014.08.011] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 07/30/2014] [Accepted: 08/05/2014] [Indexed: 01/19/2023]
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Buśko M, Kulik T, Ostrowska A, Góral T, Perkowski J. Quantitative volatile compound profiles in fungal cultures of three differentFusarium graminearumchemotypes. FEMS Microbiol Lett 2014; 359:85-93. [DOI: 10.1111/1574-6968.12569] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Revised: 06/27/2014] [Accepted: 08/05/2014] [Indexed: 11/29/2022] Open
Affiliation(s)
- Maciej Buśko
- Poznań University of Life Sciences; Department of Chemistry; Poznań Poland
| | - Tomasz Kulik
- Department of Diagnostics and Plant Pathophysiology; University of Warmia and Mazury; Olsztyn Poland
- Department of Botany and Nature Protection; University of Warmia and Mazury; Olsztyn Poland
| | - Anna Ostrowska
- Poznań University of Life Sciences; Department of Chemistry; Poznań Poland
| | - Tomasz Góral
- Department of Plant Pathology; Plant Breeding and Acclimatization Institute NRI; Blonie Poland
| | - Juliusz Perkowski
- Poznań University of Life Sciences; Department of Chemistry; Poznań Poland
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Spolti P, Del Ponte EM, Cummings JA, Dong Y, Bergstrom GC. Fitness attributes of Fusarium graminearum isolates from wheat in New York possessing a 3-ADON or 15-ADON trichothecene genotype. PHYTOPATHOLOGY 2014; 104:513-519. [PMID: 24283539 DOI: 10.1094/phyto-07-13-0206-r] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In all, 50 isolates of Fusarium graminearum from wheat spikes in New York, including 25 isolates each of the 15-acetyl-deoxynivalenol (15-ADON) and 3-ADON genotype, were tested to determine whether 3-ADON isolates are more fit for saprophytic survival and pathogenicity on wheat spikes than are 15-ADON isolates. The isolates were characterized and compared for 14 different attributes of saprophytic fitness and pathogenic fitness on a susceptible wheat variety. Isolates of the two genotypes could not be differentiated for most of these traits. Three principle components-ascospore production on corn stalks, total trichothecene amount in wheat kernels, and incidence of diseased spikelets up from the point of inoculation-accounted for 29.4, 18.9, and 10.8% of the variation among the isolates, respectively. A bootstrapping procedure grouped the isolates into two distinct groups, with 27 and 23 isolates each, with isolates from both genotypes represented in similar proportions (15-ADON/3-ADON, n = 14/13 and 11/12). Within the contemporary population of F. graminearum causing wheat head blight in New York, isolates with a 3-ADON genotype did not possess any detectable advantage over isolates with a 15-ADON genotype in saprophytic fitness or in pathogenic fitness on a susceptible wheat cultivar.
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Spolti P, Del Ponte EM, Dong Y, Cummings JA, Bergstrom GC. Triazole Sensitivity in a Contemporary Population of Fusarium graminearum from New York Wheat and Competitiveness of a Tebuconazole-Resistant Isolate. PLANT DISEASE 2014; 98:607-613. [PMID: 30708550 DOI: 10.1094/pdis-10-13-1051-re] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A sample of 50 isolates, including 25 each of the 3-acetyldeoxynivalenol and the 15-acetyldeoxynivalenol trichothecene genotype, from a contemporary collection of Fusarium graminearum associated with Fusarium head blight (FHB) of wheat in New York varied in sensitivity to tebuconazole (effective concentration leading to a 50% reduction of mycelial growth [EC50] of 0.28 to 8.09 mg/liter; μ = 1.12 mg/liter) and metconazole (0.05 to 0.86 mg/liter; μ = 0.33). Mean sensitivity did not differ between the trichothecene genotype groups. Isolate Gz448NY11 from Steuben County is the first tebuconazole-resistant field isolate of F. graminearum reported in the Americas and has the lowest sensitivity to tebuconazole (EC50 = 8.09 mg/liter) documented for this species. Suppression of FHB and deoxynivalenol (DON) following application of a commercial rate of tebuconazole was significantly diminished in plants inoculated with the tebuconazole-resistant isolate compared with those inoculated with a tebuconazole-sensitive isolate well documented for its aggressiveness and toxigenicity on wheat. There was no diminution of FHB and DON suppression with either isolate following application of metconazole. Significantly more individuals of the tebuconazole-resistant isolate were recovered from spikes inoculated with an equal mixture of the two isolates and sprayed with tebuconazole. Future studies are needed on the epidemiology and monitoring of triazole-resistant isolates to understand the risk that fungicide resistance poses to disease management and food security.
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Affiliation(s)
- Pierri Spolti
- Department of Plant Pathology and Plant-Microbe Biology, Cornell University, Ithaca NY 14853-5904, and Departamento de Fitossanidade, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 91540000, Brazil
| | | | - Yanhong Dong
- Department of Plant Pathology, University of Minnesota, St. Paul 55108
| | - Jaime A Cummings
- Department of Plant Pathology and Plant-Microbe Biology, Cornell University
| | - Gary C Bergstrom
- Department of Plant Pathology and Plant-Microbe Biology, Cornell University
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Kulik T, Buśko M, Pszczółkowska A, Perkowski J, Okorski A. Plant lignans inhibit growth and trichothecene biosynthesis in Fusarium graminearum. Lett Appl Microbiol 2014; 59:99-107. [PMID: 24635164 DOI: 10.1111/lam.12250] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 03/13/2014] [Accepted: 03/13/2014] [Indexed: 11/30/2022]
Abstract
UNLABELLED Lignans are a group of diphenolic compounds with anticancer and antioxidant properties which are present in various grains, although their effect on toxigenic fungi has been poorly examined to date. In this study, the impact of the plant lignans pinoresinol and secoisolariciresinol on growth and trichothecene biosynthesis by five Fusarium graminearum strains of different chemotypes was examined in vitro. Both tested lignans exhibited radial growth inhibition against the fungal strains. RT-qPCR analyses of tri4, tri5 and tri11 genes encoding the first steps of the trichothecene biosynthesis pathway revealed a decrease in tri mRNA levels in lignan-treated fungal cultures. Correspondingly, decreased accumulation of toxins in lignan-treated cultures was confirmed by GC-MS analysis. This is the first study to demonstrate the inhibitory effect of both pinoresinol and secoisolariciresinol on growth and trichothecene biosynthesis in F. graminearum. SIGNIFICANCE AND IMPACT OF THE STUDY Knowledge of the regulation of trichothecene production in Fusarium graminearum by environmental cues is key to the design of novel strategies to reduce mycotoxin levels in grains. Here, we show that the lignans pinoresinol and secoisolariciresinol, which occur in wheat grains, inhibit radial growth and decrease trichothecene levels in five F. graminearum strains. RT-qPCR analysis reveals that the reduction in trichothecene level in lignan-treated fungal cultures is associated with decreased mRNA transcript levels for the tri4, tri5 and tri11 genes that are involved in the trichothecene biosynthesis pathway.
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Affiliation(s)
- T Kulik
- Department of Diagnostics and Plant Pathophysiology, University of Warmia and Mazury, Olsztyn, Poland
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22
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Castañares E, Albuquerque DR, Dinolfo MI, Pinto VF, Patriarca A, Stenglein SA. Trichothecene genotypes and production profiles of Fusarium graminearum isolates obtained from barley cultivated in Argentina. Int J Food Microbiol 2014; 179:57-63. [PMID: 24727383 DOI: 10.1016/j.ijfoodmicro.2014.03.024] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 03/13/2014] [Accepted: 03/19/2014] [Indexed: 11/15/2022]
Abstract
Fusarium graminearum is one of the most important pathogens isolated from small cereal grains with Fusarium Head Blight symptoms. The presence of this fungus is often linked to the occurrence of several mycotoxins in barley and wheat. The aim of our study was to characterize trichothecene genotypes and production profiles of F. graminearum sensu stricto isolates obtained from barley grains in Argentina. A total of 110 F. graminearum s.s. isolates were analyzed by PCR assays to predict deoxynivalenol (DON), 15-acetyldeoxynivalenol (15-ADON), 3-acetyldeoxynivalenol (3-ADON) and nivalenol (NIV) production, and all isolates were found to belong to the same molecular 15-ADON genotype. Trichothecene production in autoclaved rice was analyzed by using gas chromatography (GC) and confirmed by GC-MS. Of the 110 isolates, 95% were able to produce DON, 71% produced 15-ADON, 63% 3-ADON and 52% NIV. With the exception of a single isolate, all isolates that produced NIV, also produced DON. However, the NIV production was very low, ranging from 0.13 to 0.30 μg/g. Six different production profiles of DON and its acetyl-derivatives were detected, the predominant being simultaneous production of DON, 3-ADON and 15-ADON, followed by DON production, and DON and 15-ADON co-production. This work is the first attempt to characterize the trichothecene genotypes and production profiles of F. graminearum s.s. isolates from Argentinean barley.
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Affiliation(s)
- Eliana Castañares
- Laboratorio de Biología Funcional y Biotecnología (BIOLAB)-CICBA-INBIOTEC, Facultad de Agronomía de Azul-UNCPBA, Av. República de Italia 780, 7300 Azul, Buenos Aires, Argentina
| | - Diana Ramirez Albuquerque
- Laboratorio de Microbiología de Alimentos, PROPLAME-PRHIDEB, Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, UBA, C1428EGA Buenos Aires, Argentina
| | - María Inés Dinolfo
- Laboratorio de Biología Funcional y Biotecnología (BIOLAB)-CICBA-INBIOTEC, Facultad de Agronomía de Azul-UNCPBA, Av. República de Italia 780, 7300 Azul, Buenos Aires, Argentina
| | - Virginia Fernandez Pinto
- Laboratorio de Microbiología de Alimentos, PROPLAME-PRHIDEB, Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, UBA, C1428EGA Buenos Aires, Argentina
| | - Andrea Patriarca
- Laboratorio de Microbiología de Alimentos, PROPLAME-PRHIDEB, Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, UBA, C1428EGA Buenos Aires, Argentina
| | - Sebastián Alberto Stenglein
- Laboratorio de Biología Funcional y Biotecnología (BIOLAB)-CICBA-INBIOTEC, Facultad de Agronomía de Azul-UNCPBA, Av. República de Italia 780, 7300 Azul, Buenos Aires, Argentina; Cátedra de Microbiología, Facultad de Agronomía de Azul-UNCPBA, Av. República de Italia 780, 7300, Azul, Buenos Aires, Argentina.
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Yli-Mattila T, Rämö S, Hietaniemi V, Hussien T, Carlobos-Lopez AL, Cumagun CJR. Molecular Quantification and Genetic Diversity of Toxigenic Fusarium Species in Northern Europe as Compared to Those in Southern Europe. Microorganisms 2013; 1:162-174. [PMID: 27694770 PMCID: PMC5029496 DOI: 10.3390/microorganisms1010162] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 11/05/2013] [Accepted: 11/25/2013] [Indexed: 12/02/2022] Open
Abstract
Fusarium species produce important mycotoxins, such as deoxynivalenol (DON), nivalenol (NIV) and T-2/HT-2-toxins in cereals. The highest DON and T-2/HT-2 toxin levels in northern Europe have been found in oats. About 12%-24% of Finnish oat samples in 2012 contained >1.75 mg·kg-1 of DON, which belongs to type B trichothecenes. Fusarium graminearum is the most important DON producer in northern Europe and Asia and it has been displacing the closely related F. culmorum in northern Europe. The 3ADON chemotype of F. graminearum is dominant in most northern areas, while the 15ADON chemotype of F. graminearum is predominating in Central and southern Europe. We suggest that the northern population of F. graminearum may be more specialized to oats than the southern population. Only low levels of F. culmorum DNA were found in a few oat samples and no correlation was found between F. culmorum DNA and DON levels. DNA levels of F. graminearum were in all cases in agreement with DON levels in 2011 and 2012, when DON was measured by gas chromatography-mass spectrometry (GC-MS). When the RIDA®QUICK SCAN kit results (DON) were compared to DNA levels of F. graminearum, the variation was much higher. The homogenization of the oats flour by grinding oats with 1 mm sieve seems to be connected to this variation. There was a significant correlation between the combined T-2 and HT-2 and the combined DNA levels of F. langsethiae and F. sporotrichioides in Finland in 2010-2012.
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Affiliation(s)
- Tapani Yli-Mattila
- Molecular Plant Biology, Department of Biochemistry, University of Turku, FI-20014 Turku, Finland.
| | - Sari Rämö
- MTT Agrifood Research Finland, FI-31600 Jokioinen, Finland.
| | | | - Taha Hussien
- Mycotoxins Lab, Department of Food Toxicology and Contaminant, National Research Center, Cairo 12311, Egypt.
| | - Ana Liza Carlobos-Lopez
- Crop Protection Cluster, College of Agriculture, University of the Philippines Los Baños, Laguna 4030, Philippines.
| | - Christian Joseph R Cumagun
- Crop Protection Cluster, College of Agriculture, University of the Philippines Los Baños, Laguna 4030, Philippines.
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Liu Z, Liu Y, Liu C, Song Z, Li Q, Zha Q, Lu C, Wang C, Ning Z, Zhang Y, Tian C, Lu A. The chemotaxonomic classification of Rhodiola plants and its correlation with morphological characteristics and genetic taxonomy. Chem Cent J 2013; 7:118. [PMID: 23844866 PMCID: PMC3718703 DOI: 10.1186/1752-153x-7-118] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Accepted: 07/10/2013] [Indexed: 01/30/2023] Open
Abstract
Background Rhodiola plants are used as a natural remedy in the western world and as a traditional herbal medicine in China, and are valued for their ability to enhance human resistance to stress or fatigue and to promote longevity. Due to the morphological similarities among different species, the identification of the genus remains somewhat controversial, which may affect their safety and effectiveness in clinical use. Results In this paper, 47 Rhodiola samples of seven species were collected from thirteen local provinces of China. They were identified by their morphological characteristics and genetic and phytochemical taxonomies. Eight bioactive chemotaxonomic markers from four chemical classes (phenylpropanoids, phenylethanol derivatives, flavonoids and phenolic acids) were determined to evaluate and distinguish the chemotaxonomy of Rhodiola samples using an HPLC-DAD/UV method. Hierarchical cluster analysis (HCA) and principal component analysis (PCA) were applied to compare the two classification methods between genetic and phytochemical taxonomy. Conclusions The established chemotaxonomic classification could be effectively used for Rhodiola species identification.
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Affiliation(s)
- Zhenli Liu
- Institute of Basic Research in Clinical Medicine, China Academy of Chinese Medical Sciences, Beijing 100700, China.
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25
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Liu Z, Liu Y, Liu C, Song Z, Li Q, Zha Q, Lu C, Wang C, Ning Z, Zhang Y, Tian C, Lu A. The chemotaxonomic classification of Rhodiola plants and its correlation with morphological characteristics and genetic taxonomy. Chem Cent J 2013. [PMID: 23844866 DOI: 10.1007/bf02862235] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023] Open
Abstract
BACKGROUND Rhodiola plants are used as a natural remedy in the western world and as a traditional herbal medicine in China, and are valued for their ability to enhance human resistance to stress or fatigue and to promote longevity. Due to the morphological similarities among different species, the identification of the genus remains somewhat controversial, which may affect their safety and effectiveness in clinical use. RESULTS In this paper, 47 Rhodiola samples of seven species were collected from thirteen local provinces of China. They were identified by their morphological characteristics and genetic and phytochemical taxonomies. Eight bioactive chemotaxonomic markers from four chemical classes (phenylpropanoids, phenylethanol derivatives, flavonoids and phenolic acids) were determined to evaluate and distinguish the chemotaxonomy of Rhodiola samples using an HPLC-DAD/UV method. Hierarchical cluster analysis (HCA) and principal component analysis (PCA) were applied to compare the two classification methods between genetic and phytochemical taxonomy. CONCLUSIONS The established chemotaxonomic classification could be effectively used for Rhodiola species identification.
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Affiliation(s)
- Zhenli Liu
- Institute of Basic Research in Clinical Medicine, China Academy of Chinese Medical Sciences, Beijing 100700, China.
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Alkadri D, Nipoti P, Döll K, Karlovsky P, Prodi A, Pisi A. Study of fungal colonization of wheat kernels in syria with a focus on fusarium species. Int J Mol Sci 2013; 14:5938-51. [PMID: 23493058 PMCID: PMC3634408 DOI: 10.3390/ijms14035938] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 03/04/2013] [Accepted: 03/11/2013] [Indexed: 11/16/2022] Open
Abstract
Wheat is one of the main crops in Mediterranean countries, and its cultivation has an important role in the Syrian economy. In Syria, Fusarium head blight (FHB) has not been reported so far. Mycological analysis of 48 samples of wheat kernels collected from cultivation areas with different climatic conditions were performed in 2009 and 2010. Fungal isolates were identified at the genus level morphologically; Fusarium species were characterized morphologically and by species-specific PCR. The most frequent fungal genera found were Alternaria spp. and Cladosporium spp., with frequencies of 24.7% and 8.1%, respectively, while the frequency of Fusarium spp. was 1.5% of kernels. Most frequent Fusarium species were F. tricinctum (30% of all Fusarium isolates), F. culmorum (18%), F. equiseti (14%) and F. graminearum (13%). The mycotoxin production potential of selected Fusarium isolates was assessed by HPLC-MS analysis of rice cultures; chemotyping by PCR was carried out for comparison. All six F. graminearum strains tested produced small amounts (<3 mg/kg) of nivalenol (NIV). All ten F. culmorum strains tested produced large amounts of trichothecenes (>100 mg/kg); four strains produced NIV and six strains produced deoxynivalenol (DON) and 3-acetyl-deoxynivalenol (3Ac-DON). PCR chemotyping lead to an oversimplified picture, because all 3Ac-DON chemotype strains produced more DON than 3Ac-DON; furthermore, the strongest NIV producers produced significant amounts of DON. All tested strains of F. culmorum, F. graminearum, F. pseudograminearum (two strains) and most F. equiseti strains (five of six strains) produced zearalenone. Grains of durum wheat were more frequently colonized by Fusarium spp. than grains of soft wheat. Incidence of Fusarium spp. in irrigated fields was higher than in rainfed fields. The incidence of Fusarium strains producing mycotoxins raises concerns about the risk of Fusarium head blight to Syria and its consequences for public health.
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Affiliation(s)
- Dima Alkadri
- Department of Agroenvironmental Science and Technology, Alma Mater Studiorum Bologna University, viale G. Fanin 44, Bologna 40127, Italy; E-Mails: (D.A.); (P.N.); (A.P.)
| | - Paola Nipoti
- Department of Agroenvironmental Science and Technology, Alma Mater Studiorum Bologna University, viale G. Fanin 44, Bologna 40127, Italy; E-Mails: (D.A.); (P.N.); (A.P.)
| | - Katharina Döll
- Molecular Phytopathology and Mycotoxin Research, University of Göttingen, Grisebachstrasse 6, Göttingen 37077, Germany; E-Mails: (K.D.); (P.K.)
| | - Petr Karlovsky
- Molecular Phytopathology and Mycotoxin Research, University of Göttingen, Grisebachstrasse 6, Göttingen 37077, Germany; E-Mails: (K.D.); (P.K.)
| | - Antonio Prodi
- Department of Agroenvironmental Science and Technology, Alma Mater Studiorum Bologna University, viale G. Fanin 44, Bologna 40127, Italy; E-Mails: (D.A.); (P.N.); (A.P.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +39-051-2096-722 (ext.123); Fax: +39-051-2096-720
| | - Annamaria Pisi
- Department of Agroenvironmental Science and Technology, Alma Mater Studiorum Bologna University, viale G. Fanin 44, Bologna 40127, Italy; E-Mails: (D.A.); (P.N.); (A.P.)
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Kulik T, Łojko M, Jestoi M, Perkowski J. Sublethal concentrations of azoles induce tri transcript levels and trichothecene production in Fusarium graminearum. FEMS Microbiol Lett 2012; 335:58-67. [DOI: 10.1111/j.1574-6968.2012.02637.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2012] [Revised: 07/09/2012] [Accepted: 07/10/2012] [Indexed: 12/26/2022] Open
Affiliation(s)
- Tomasz Kulik
- Department of Diagnostics and Plant Pathophysiology; University of Warmia and Mazury; Olsztyn; Poland
| | - Maciej Łojko
- Department of Diagnostics and Plant Pathophysiology; University of Warmia and Mazury; Olsztyn; Poland
| | - Marika Jestoi
- Finnish Food Safety Authority (Evira); Chemistry and Toxicology Unit; Helsinki; Finland
| | - Juliusz Perkowski
- Department of Chemistry; Poznan University of Life Sciences; Poznan; Poland
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Nielsen LK, Jensen JD, Rodríguez A, Jørgensen LN, Justesen AF. TRI12 based quantitative real-time PCR assays reveal the distribution of trichothecene genotypes of F. graminearum and F. culmorum isolates in Danish small grain cereals. Int J Food Microbiol 2012; 157:384-92. [PMID: 22781579 DOI: 10.1016/j.ijfoodmicro.2012.06.010] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Revised: 06/08/2012] [Accepted: 06/19/2012] [Indexed: 11/26/2022]
Abstract
Quantitative real-time PCR assays, based on polymorphisms in the TRI12 gene of the trichothecene pathway, were developed to identify and quantify the trichothecene genotypes producing 3-acetyl-deoxynivalenol (3ADON), 15-acetyl-deoxynivalenol (15ADON) or nivalenol (NIV) in the Fusarium graminearum species complex, Fusarium culmorum, Fusarium cerealis and Fusarium pseudograminearum. These assays were applied on a total of 378 field samples of cereal grain of wheat, barley, triticale, rye and oats collected from 2003 to 2007 to study the trichothecene genotype composition in Danish cereals. The three genotypes, 3ADON, 15ADON and NIV were found in all five cereal species, great annual variation in the occurrence of the trichothecene genotypes was evident with considerable variation between the samples. 3ADON was the dominant genotype in barley, triticale, rye and oats while 15ADON was most dominant in wheat. The NIV genotype was found at low levels in most samples. Study of genotype composition within the Danish F. graminearum and F. culmorum population was based on principal component analysis (PCA). PCA revealed that the dominating genotype of F. graminearum in wheat is 15ADON. For barley, the PCA analysis indicated that the F. graminearum population consisted of all three genotypes, and in triticale, the F. graminearum population consisted mainly of 15ADON genotype. F. culmorum/F. cerealis showed correlation to the NIV genotype in wheat and triticale but not in barley. F. culmorum/F. cerealis also showed some correlation to 3ADON especially in wheat and triticale. Selected wheat and barley samples from 1957 to 2000 showed low amounts of F. graminearum and F. culmorum in general but with a dominance of the 3ADON genotype. 15ADON was not detected in these samples, except for very low amounts in the sample representing the years from 1997 to 2000. Detection of low amounts of the 15ADON genotype in these historical samples and the relatively high amounts of 15ADON genotype in 2003 and following years correspond well with the occurrence of F. graminearum and indicates that the 15ADON genotype was introduced along with F. graminearum around 2000. The amounts of the 3ADON and 15ADON genotypes correlated well with the total amount of DON whereas the amounts of NIV genotype correlated well with the amount of NIV in wheat and triticale but not in barley where the results indicate that Fusarium poae may also contribute to the NIV content.
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Affiliation(s)
- L K Nielsen
- Aarhus University, Faculty of Science and Technology, Institute of Agroecology, Research Centre Flakkebjerg, Denmark
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