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Bilska K, Stuper-Szablewska K, Kulik T, Buśko M, Załuski D, Perkowski J. Resistance-Related l-Pyroglutamic Acid Affects the Biosynthesis of Trichothecenes and Phenylpropanoids by F. graminearum Sensu Stricto. Toxins (Basel) 2018; 10:toxins10120492. [PMID: 30477204 PMCID: PMC6315601 DOI: 10.3390/toxins10120492] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 11/19/2018] [Accepted: 11/22/2018] [Indexed: 11/30/2022] Open
Abstract
Fungicide application remains amongst the most widely used methods of fungal control in agroecosystems. However, the extensive use of fungicides poses hazards to human health and the natural environment and does not always ensure the effective decrease of mycotoxins in food and feed. Nowadays, the rising threat from mycotoxin contamination of staple foods has stimulated efforts in developing alternative strategies to control plant pathogenic fungi. A substantial effort is focused on the identification of plant-derived compounds inhibiting mycotoxin production by plant pathogenic fungi. l-Pyroglutamic acid has recently been suggested as playing a role in the response of barley to toxigenic Fusaria. Considering the above, we studied the response of various strains of F. graminearum sensu stricto to different levels of l-pyroglutamic acid on solid YES (yeast extract sucrose) media. l-Pyroglutamic acid decreased the accumulation of trichothecenes in all examined strains. Gene expression studies addressing Tri genes (Tri4, Tri5, and Tri10), which induce the biosynthesis of trichothecenes, revealed the production of mycotoxins by l-pyroglutamic acid to be inhibited at the transcriptional level. Besides inhibitory effects on mycotoxin production, l-pyroglutamic acid exhibited variable and concentration-related effects on phenylpropanoid production by fungi. Accumulation of most of the fungal-derived phenolic acids decreased in the presence of 100 and 400 µg/g of l-pyroglutamic acid. However, a higher dose (800 µg/g) of l-pyroglutamic acid increased the accumulation of trans-cinnamic acid in the media. The accumulation of fungal-derived naringenin increased in the presence of l-pyroglutamic acid. Contrasting results were obtained for quercetin, apigenin, luteolin, and kaempferol, the accumulation of which decreased in the samples treated with 100 and 400 µg/g of l-pyroglutamic acid, whereas the highest l-pyroglutamic acid concentration (800 µg/g) seemed to induce their biosynthesis. The results obtained in this study provide new insights for breeders involved in studies on resistance against Fusaria.
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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.
| | - Kinga Stuper-Szablewska
- Department of Chemistry, Poznan University of Life Sciences, Wojska Polskiego 75, 60-637 Poznan, Poland.
| | - Tomasz Kulik
- Department of Botany and Nature Protection, University of Warmia and Mazury in Olsztyn Plac Łódzki 1, 10-727 Olsztyn, Poland.
| | - Maciej Buśko
- Department of Chemistry, Poznan University of Life Sciences, Wojska Polskiego 75, 60-637 Poznan, Poland.
| | - Dariusz Załuski
- Department of Plant Breeding and Seed Production, University of Warmia and Mazury in Olsztyn, Plac Łódzki 3, 10-727 Olsztyn, Poland.
| | - Juliusz Perkowski
- Department of Chemistry, Poznan University of Life Sciences, Wojska Polskiego 75, 60-637 Poznan, Poland.
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The Trichothecenes and Their Biosynthesis. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2007. [DOI: 10.1007/978-3-211-49389-2_2] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Ponts N, Pinson-Gadais L, Barreau C, Richard-Forget F, Ouellet T. Exogenous H2O2and catalase treatments interfere withTrigenes expression in liquid cultures ofFusarium graminearum. FEBS Lett 2007; 581:443-7. [PMID: 17250833 DOI: 10.1016/j.febslet.2007.01.003] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2006] [Revised: 12/22/2006] [Accepted: 01/05/2007] [Indexed: 11/16/2022]
Abstract
Effect of exogenous H(2)O(2) and catalase was tested in liquid cultures of the deoxynivalenol and 15-acetyldeoxynivalenol-producing fungus Fusarium graminearum. Accordingly to previous results, H(2)O(2) supplementation of the culture medium leads to increased toxin production. This study indicates that this event seems to be linked to a general up regulation of genes involved in the deoxynivalenol and 15-acetyldeoxynivalenol biosynthesis pathway, commonly named Tri genes. In catalase-treated cultures, toxin accumulation is reduced, and Tri genes expression is significantly down regulated. Furthermore, kinetics of expression of several Tri genes is proposed in relation to toxin accumulation. Biological meanings of these findings are discussed.
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Affiliation(s)
- Nadia Ponts
- INRA Centre de Bordeaux, UPR1264 MycSA, 71 Avenue Edouard Bourleaux, BP81, 33883 Villenave d'Ornon Cedex, France
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Bakan B, Giraud-Delville C, Pinson L, Richard-Molard D, Fournier E, Brygoo Y. Identification by PCR of Fusarium culmorum strains producing large and small amounts of deoxynivalenol. Appl Environ Microbiol 2002; 68:5472-9. [PMID: 12406740 PMCID: PMC129898 DOI: 10.1128/aem.68.11.5472-5479.2002] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2002] [Accepted: 08/19/2002] [Indexed: 11/20/2022] Open
Abstract
Thirty deoxynivalenol-producing F. culmorum strains, isolated from wheat grains, were incubated in vitro and analyzed for trichothecene production. Seventeen strains produced more than 1 ppm of deoxynivalenol and acetyldeoxynivalenol and were considered high-deoxynivalenol-producing strains, whereas 13 F. culmorum strains produced less than 0.07 ppm of trichothecenes and were considered low-deoxynivalenol-producing strains. For all strains, a 550-base portion of the trichodiene synthase gene (tri5) was amplified and sequenced. According to the tri5 data, the F. culmorum strains tested clustered into two groups that correlated with in vitro deoxynivalenol production. For three high-producing and three low-producing F. culmorum strains, the tri5-tri6 intergenic region was then sequenced, which confirmed the two separate clusters within the F. culmorum strains. According to the tri5-tri6 sequence data, specific PCR primers were designed to allow differentiation of high-producing from low-producing F. culmorum strains.
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Affiliation(s)
- B Bakan
- Laboratoire de Microbiologie et Technologie Céréalières, Institut National de la Recherche Agronomique, 44316 Nantes, France.
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Schlösser T, Schmidt G, Stahmann KP. Transcriptional regulation of 3,4-dihydroxy-2-butanone 4-phosphate synthase. MICROBIOLOGY (READING, ENGLAND) 2001; 147:3377-86. [PMID: 11739770 DOI: 10.1099/00221287-147-12-3377] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The filamentous hemiascomycete Ashbya gossypii is a strong riboflavin overproducer. A striking but as yet uninvestigated phenomenon is the fact that the overproduction of this vitamin starts when growth rate declines, which means that most of the riboflavin is produced in the stationary phase, the so-called production phase. The specific activity of 3,4-dihydroxy-2-butanone 4-phosphate (DHBP) synthase, the first enzyme in the biosynthetic pathway for riboflavin, was determined during cultivation and an increase during the production phase was found. Furthermore, an increase of RIB3 mRNA, encoding DHBP synthase, was observed by competitive RT-PCR in the production phase. The mRNAs of two housekeeping genes, ACT1 (encoding actin) and TEF (encoding translation elongation factor-1 alpha), served as standards in the RT-PCR. Reporter studies with a RIB3 promoter-lacZ fusion showed an increase of beta-galactosidase specific activity in the production phase. This investigation verified that the increase of RIB3 mRNA in the production phase is caused by an induction of promoter activity. These data suggest that the time course of riboflavin overproduction of A. gossypii is correlated with a transcriptional regulation of the DHBP synthase.
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Affiliation(s)
- T Schlösser
- Institut für Biotechnologie 1, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
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Edwards SG, Pirgozliev SR, Hare MC, Jenkinson P. Quantification of trichothecene-producing Fusarium species in harvested grain by competitive PCR to determine efficacies of fungicides against Fusarium head blight of winter wheat. Appl Environ Microbiol 2001; 67:1575-80. [PMID: 11282607 PMCID: PMC92771 DOI: 10.1128/aem.67.4.1575-1580.2001] [Citation(s) in RCA: 172] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2000] [Accepted: 01/19/2001] [Indexed: 11/20/2022] Open
Abstract
We developed a PCR-based assay to quantify trichothecene-producing Fusarium based on primers derived from the trichodiene synthase gene (Tri5). The primers were tested against a range of fusarium head blight (FHB) (also known as scab) pathogens and found to amplify specifically a 260-bp product from 25 isolates belonging to six trichothecene-producing Fusarium species. Amounts of the trichothecene-producing Fusarium and the trichothecene mycotoxin deoxynivalenol (DON) in harvested grain from a field trial designed to test the efficacies of the fungicides metconazole, azoxystrobin, and tebuconazole to control FHB were quantified. No correlation was found between FHB severity and DON in harvested grain, but a good correlation existed between the amount of trichothecene-producing Fusarium and DON present within grain. Azoxystrobin did not affect levels of trichothecene-producing Fusarium compared with those of untreated controls. Metconazole and tebuconazole significantly reduced the amount of trichothecene-producing Fusarium in harvested grain. We hypothesize that the fungicides affected the relationship between FHB severity and the amount of DON in harvested grain by altering the proportion of trichothecene-producing Fusarium within the FHB disease complex and not by altering the rate of DON production. The Tri5 quantitative PCR assay will aid research directed towards reducing amounts of trichothecene mycotoxins in food and animal feed.
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Affiliation(s)
- S G Edwards
- Crop and Environment Research Centre, Harper Adams University College, Newport, Shropshire TF10 8NB, United Kingdom.
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Doohan FM, Weston G, Rezanoor HN, Parry DW, Nicholson P. Development and use of a reverse transcription-PCR assay to study expression of Tri5 by Fusarium species in vitro and in planta. Appl Environ Microbiol 1999; 65:3850-4. [PMID: 10473385 PMCID: PMC99710 DOI: 10.1128/aem.65.9.3850-3854.1999] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/1999] [Accepted: 06/16/1999] [Indexed: 11/20/2022] Open
Abstract
The Tri5 gene encodes trichodiene synthase, which catalyzes the first reaction in the trichothecene biosynthetic pathway. In vitro, a direct relationship was observed between Tri5 expression and the increase in deoxynivalenol production over time. We developed a reverse transcription (RT)-PCR assay to quantify Tri5 gene expression in trichothecene-producing strains of Fusarium species. We observed an increase in Tri5 expression following treatment of Fusarium culmorum with fungicides, and we also observed an inverse relationship between Tri5 expression and biomass, as measured by beta-D-glucuronidase activity, during colonization of wheat (cv. Avalon) seedlings by F. culmorum. RT-PCR analysis also showed that for ears of wheat cv. Avalon inoculated with F. culmorum, there were different levels of Tri5 expression in grain and chaff at later growth stages. We used the Tri5-specific primers to develop a PCR assay to detect trichothecene-producing Fusarium species in infected plant material.
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Affiliation(s)
- F M Doohan
- Cereals Department, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, United Kingdom.
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de Nijs M, Nabben L, Wernars K. Isolation of Fusarium DNA for molecular analysis with and without mechanical cell disruption. J Microbiol Methods 1996. [DOI: 10.1016/0167-7012(96)00920-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Proctor RH, Hohn TM, McCormick SP, Desjardins AE. Tri6 encodes an unusual zinc finger protein involved in regulation of trichothecene biosynthesis in Fusarium sporotrichioides. Appl Environ Microbiol 1995; 61:1923-30. [PMID: 7646028 PMCID: PMC167455 DOI: 10.1128/aem.61.5.1923-1930.1995] [Citation(s) in RCA: 168] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
In Fusarium sporotrichioides, several genes required for biosynthesis of the trichothecene mycotoxin T-2 toxin are closely linked. Further characterization of this gene cluster has revealed a gene, Tri6, that specifies a 217-amino-acid protein with regions similar to Cys2His2 zinc finger proteins. Temporal expression of Tri6 is similar to that of trichothecene biosynthetic pathway genes. Analysis of Tri6 transcripts indicated that transcription is initiated in two regions and that within each region there may be at least four initiation sites. Disruption of Tri6 resulted in a mutant that did not produce trichothecenes but that did accumulate low levels of the trichothecene precursor trichodiene. The Tri6 mutant was unable to convert six trichothecene biosynthetic intermediates to T-2 toxin, and transcription of two biosynthetic genes, Tri4 and Tri5, was greatly reduced in the mutant relative to the wild type. In addition, the product of Tri6 functioned as a transcriptional activator in Saccharomyces cerevisiae when fused to the DNA binding region of GAL4. These results indicate that Tri6 encodes a protein involved in the transcriptional regulation of trichothecene biosynthetic genes in F. sporotrichioides.
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Affiliation(s)
- R H Proctor
- Mycotoxin Research Unit, National Center for Agricultural Utilization Research, USDA Agricultural Research Service, Peoria, Illinois 61604-3902, USA
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12
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Desjardins AE, Hohn TM, McCormick SP. Trichothecene biosynthesis in Fusarium species: chemistry, genetics, and significance. Microbiol Rev 1993. [PMID: 8246841 DOI: 10.1128/cmr.16.3.497] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Several species of the genus Fusarium and related fungi produce trichothecenes which are sesquiterpenoid epoxides that act as potent inhibitors of eukaryotic protein synthesis. Interest in the trichothecenes is due primarily to their widespread contamination of agricultural commodities and their adverse effects on human and animal health. In this review, we describe the trichothecene biosynthetic pathway in Fusarium species and discuss genetic evidence that several trichothecene biosynthetic genes are organized in a gene cluster. Trichothecenes are highly toxic to a wide range of eukaryotes, but their specific function, if any, in the survival of the fungi that produce them is not obvious. Trichothecene gene disruption experiments indicate that production of trichothecenes can enhance the severity of disease caused by Fusarium species on some plant hosts. Understanding the regulation and function of trichothecene biosynthesis may aid in development of new strategies for controlling their production in food and feed products.
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Affiliation(s)
- A E Desjardins
- Mycotoxin Research Unit, U.S. Department of Agriculture, Peoria, Illinois 61604
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Desjardins AE, Hohn TM, McCormick SP. Trichothecene biosynthesis in Fusarium species: chemistry, genetics, and significance. Microbiol Rev 1993. [PMID: 8246841 DOI: 10.1128/mmbr.57.3.595-604.1993] [Citation(s) in RCA: 153] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
Several species of the genus Fusarium and related fungi produce trichothecenes which are sesquiterpenoid epoxides that act as potent inhibitors of eukaryotic protein synthesis. Interest in the trichothecenes is due primarily to their widespread contamination of agricultural commodities and their adverse effects on human and animal health. In this review, we describe the trichothecene biosynthetic pathway in Fusarium species and discuss genetic evidence that several trichothecene biosynthetic genes are organized in a gene cluster. Trichothecenes are highly toxic to a wide range of eukaryotes, but their specific function, if any, in the survival of the fungi that produce them is not obvious. Trichothecene gene disruption experiments indicate that production of trichothecenes can enhance the severity of disease caused by Fusarium species on some plant hosts. Understanding the regulation and function of trichothecene biosynthesis may aid in development of new strategies for controlling their production in food and feed products.
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Affiliation(s)
- A E Desjardins
- Mycotoxin Research Unit, U.S. Department of Agriculture, Peoria, Illinois 61604
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Desjardins AE, Hohn TM, McCormick SP. Trichothecene biosynthesis in Fusarium species: chemistry, genetics, and significance. Microbiol Rev 1993; 57:595-604. [PMID: 8246841 PMCID: PMC372927 DOI: 10.1128/mr.57.3.595-604.1993] [Citation(s) in RCA: 171] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Several species of the genus Fusarium and related fungi produce trichothecenes which are sesquiterpenoid epoxides that act as potent inhibitors of eukaryotic protein synthesis. Interest in the trichothecenes is due primarily to their widespread contamination of agricultural commodities and their adverse effects on human and animal health. In this review, we describe the trichothecene biosynthetic pathway in Fusarium species and discuss genetic evidence that several trichothecene biosynthetic genes are organized in a gene cluster. Trichothecenes are highly toxic to a wide range of eukaryotes, but their specific function, if any, in the survival of the fungi that produce them is not obvious. Trichothecene gene disruption experiments indicate that production of trichothecenes can enhance the severity of disease caused by Fusarium species on some plant hosts. Understanding the regulation and function of trichothecene biosynthesis may aid in development of new strategies for controlling their production in food and feed products.
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Affiliation(s)
- A E Desjardins
- Mycotoxin Research Unit, U.S. Department of Agriculture, Peoria, Illinois 61604
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