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Tripathi YN, Singh VK, Kumar S, Shukla V, Yadav M, Upadhyay RS. Identification of hub genes and potential networks by centrality network analysis of PCR amplified Fusarium oxysporum f. sp. lycopersici EF1α gene. BMC Microbiol 2024; 24:336. [PMID: 39256659 PMCID: PMC11389467 DOI: 10.1186/s12866-024-03434-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Accepted: 07/22/2024] [Indexed: 09/12/2024] Open
Abstract
BACKGROUND Fusarium wilt is a devastating soil-borne fungal disease of tomato across the world. Conventional method of disease prevention including usage of common pesticides and methods like soil solarisation are usually ineffective in the treatment of this disease. Therefore, there is an urgent need to identify virulence related genes in the pathogen which can be targeted for fungicide development. RESULTS Pathogenicity testing and phylogenetic classification of the pathogen used in this study confirmed it as Fusarium oxysporum f. sp. lycopersici (Fol) strain. A recent discovery indicates that EF1α, a protein with conserved structural similarity across several fungal genera, has a role in the pathogenicity of Magnaporthe oryzae, the rice blast fungus. Therefore, in this study we have done structural and functional classification of EF1α to understand its role in pathogenicity of Fol. The protein model of Fol EF1α was created using the template crystal structure of the yeast elongation factor complex EEF1A:EEF1BA which showed maximum similarity with the target protein. Using the STRING online database, the interactive information among the hub genes of EF1α was identified and the protein-protein interaction network was recognized using the Cytoscape software. On combining the results of functional analysis, MCODE, CytoNCA and CytoHubba 4 hub genes including Fol EF1α were selected for further investigation. The three interactors of Fol EF1α showed maximum similarity with homologous proteins found in Neurospora crassa complexed with the known fungicide, cycloheximide. Through the sequence similarity and PDB database analysis, homologs of Fol EF1α were found: EEF1A:EEF1BA in complex with GDPNP in yeast and EF1α in complex with GDP in Sulfolobus solfataricus. The STITCH database analysis suggested that EF1α and its other interacting partners interact with guanosine diphosphate (GDPNP) and guanosine triphosphate (GTP). CONCLUSIONS Our study offers a framework for recognition of several hub genes network in Fusarium wilt that can be used as novel targets for fungicide development. The involvement of EF1α in nucleocytoplasmic transport pathway suggests that it plays role in GTP binding and thus apart from its use as a biomarker, it may be further exploited as an effective target for fungicide development. Since, the three other proteins that were found to be tightly associated Fol EF1α have shown maximum similarity with homologous proteins of Neurospora crassa that form complex with fungicide- Cycloheximide. Therefore, we suggest that cycloheximide can also be used against Fusarium wilt disease in tomato. The active site cavity of Fol EF1α can also be determined for computational screening of fungicides using the homologous proteins observed in yeast and Sulfolobus solfataricus. On this basis, we also suggest that the other closely associated genes that have been identified through STITCH analysis, they can also be targeted for fungicide development.
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Affiliation(s)
- Yashoda N Tripathi
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, India.
| | - Vinay K Singh
- School of Biotechnology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Sunil Kumar
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Vaishali Shukla
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Mukesh Yadav
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Ram S Upadhyay
- Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, India
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Cervini C, Naz N, Verheecke-Vaessen C, Medina A. Impact of predicted climate change environmental conditions on the growth of Fusarium asiaticum strains and mycotoxins production on a wheat-based matrix. Int J Food Microbiol 2024; 416:110658. [PMID: 38484608 DOI: 10.1016/j.ijfoodmicro.2024.110658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 02/12/2024] [Accepted: 03/01/2024] [Indexed: 04/19/2024]
Abstract
Fusarium asiaticum is a predominant fungal pathogen causing Fusarium Head Blight (FHB) in wheat and barley in China and is associated with approximately £201 million in annual losses due to grains contaminated with mycotoxins. F. asiaticum produces deoxynivalenol and zearalenone whose maximum limits in cereals and cereals-derived products have been established in different countries including the EU. Few studies are available on the ecophysiological behaviour of this fungal pathogen, but nothing is known about the impact of projected climate change scenarios on its growth and mycotoxin production. Therefore, this study aimed to examine the interacting effect of i) current and increased temperature (25 vs 30 °C), ii) drought stress variation (0.98 vs 0.95 water activity; aw) and iii) existing and predicted CO2 concentrations (400 vs 1000 ppm) on fungal growth and mycotoxin production (type B trichothecenes and zearalenone) by three F. asiaticum strains (CH024b, 82, 0982) on a wheat-based matrix after 10 days of incubation. The results showed that, when exposed to increased CO2 concentration (1000 ppm) there was a significant reduction of fungal growth compared to current concentration (400 ppm) both at 25 and 30 °C, especially at 0.95 aw. The multi-mycotoxin analysis performed by LC-MS/MS qTRAP showed a significant increase of deoxynivalenol and 15-acetyldeoxynivalenol production when the CH024b strain was exposed to elevated CO2 compared to current CO2 levels. Zearalenone production by the strain 0982 was significantly stimulated by mild water stress (0.95 aw) and increased CO2 concentration (1000 ppm) regardless of the temperature. Such results highlight that intraspecies variability exist among F. asiaticum strains with some mycotoxins likely to exceed current EU legislative limits under prospected climate change conditions.
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Affiliation(s)
- Carla Cervini
- Applied Mycology Group, Environment and AgriFood Theme, Cranfield University, Cranfield, UK.
| | - Naoreen Naz
- Applied Mycology Group, Environment and AgriFood Theme, Cranfield University, Cranfield, UK
| | | | - Angel Medina
- Applied Mycology Group, Environment and AgriFood Theme, Cranfield University, Cranfield, UK
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Marketed Quinoa (Chenopodium quinoa Willd.) Seeds: A Mycotoxin-Free Matrix Contaminated by Mycotoxigenic Fungi. Pathogens 2023; 12:pathogens12030418. [PMID: 36986340 PMCID: PMC10057975 DOI: 10.3390/pathogens12030418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/03/2023] [Accepted: 03/04/2023] [Indexed: 03/09/2023] Open
Abstract
A total of 25 marketed quinoa seed samples different for origin, farming system and packaging were analyzed for the presence of mycotoxigenic fungi (by isolation both on Potato Dextrose Agar and with the deep-freezing blotter method) and relative contamination by mycotoxins (by LC-MS/MS analysis). Fungal microorganisms, but not mycotoxins, were detected in all the samples, and 25 isolates representative of the mycobiota were obtained. Morphological and molecular characterization and, for some isolates, the in vitro mycotoxigenic profile, allowed the identification of 19 fungal species within five different genera: Alternaria, Aspergillus, Penicillium, Cladosporium and Fusarium. Among the identified species, Alternaria abundans, A. chartarum, A. arborescens, Cladosporium allicinum, C. parasubtilissimum, C. pseudocladosporioides, C. uwebraunianum, Aspergillus jensenii, A. tubingensis, Penicillium dipodomyis, P. verrucosum and P. citreosulfuratum were first reported on quinoa, and Alternaria infectoria and Fusarium oxysporum were first reported on quinoa seeds. The geographical origin, farming system and packaging were showed to affect the amount and type of the isolated fungal species, highlighting that the level of fungal presence and their related secondary metabolites is conditioned by different steps of the quinoa supply chain. However, despite the presence of mycotoxigenic fungi, the marketed quinoa seeds analyzed resulted in being free from mycotoxins.
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Quantitative PCR assays for the species-specific detection of Fusarium graminearum sensu stricto and Fusarium asiaticum in winter wheat growing regions in China. Int J Food Microbiol 2023; 387:110061. [PMID: 36566702 DOI: 10.1016/j.ijfoodmicro.2022.110061] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 11/30/2022] [Accepted: 12/17/2022] [Indexed: 12/24/2022]
Abstract
Fusarium graminearum species complex (FGSC) is one of the most devastating fungal plant pathogens of cereal crops worldwide, resulting in a corresponding mycotoxins contamination in cereal-based food. The detection of FGSC to study its population structure and species distribution is of great concern for the integrated control of mycotoxins contamination in grains entering food supply chains. In this study, real time quantitative PCR (RT-qPCR) and droplet digital PCR (ddPCR) methods were developed for the species-specific detection of Fusarium graminearum species complex in winter wheat growing regions in China. Primers and probes were designed basing the on the sequence of Fg-16 SCAR fragment (sequence characterized amplified regions analysis) and confirmed to make a distinguishment between the two prevailing species including Fusarium graminearum sensu stricto and Fusarium asiaticum. The assay specificity was tested against 24 isolates of target Fusarium species and several non-target Fusarium species that were frequently isolated from wheat in China. Consistent results could be obtained by the developed RT-qPCR and ddPCR assays, and both of them were sensitive enough for the detection of FGSC in these regions. Population structure and species distribution of FGSC in North China plain and Yangtze River plain by the developed qPCR assays accorded with previous results obtained by fungal isolation method. The newly developed qPCR assays are time-saving and will provide new insights during the routine surveillance of FGSC in winter wheat growing regions in China and possibly other countries.
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Deoxynivalenol and T-2 Toxin as Major Concerns in Durum Wheat from Italy. Toxins (Basel) 2022; 14:toxins14090627. [PMID: 36136565 PMCID: PMC9503377 DOI: 10.3390/toxins14090627] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/29/2022] [Accepted: 09/06/2022] [Indexed: 11/16/2022] Open
Abstract
Fusarium Head Blight is a devastating disease of wheat caused by a complex of Fusarium species producing a wide range of mycotoxins. Fusarium species occurrence is variable in different geographical areas and subjected to a continuous evolution in their distribution. A total of 141 durum wheat field samples were collected in different regions of Italy in three years, and analyzed for Fusarium species and related mycotoxin occurrence. Mycotoxin contamination varied according to year and geographical origin. The highest mycotoxin contamination was detected in 2014. Deoxynivalenol was detected with an average of 240 µg/kg only in Central and Northern Italy; and T-2 and HT-2 toxins with an average of 150 µg/kg in Southern Italy. Approximately 80% of samples from Southern Italy in 2013/2014 showed T-2 and HT-2 levels over the EU recommended limits. Fusarium graminearum occurred mostly in Northern Italy, while F. langsethiae occurred in Southern Italy. These data showed that a real mycotoxin risk related to Fusarium exists on the whole in Italy, but varies according with geographical areas and environmental conditions. Consistent monitoring of Fusarium species and related mycotoxin distribution on a long period is worthwhile to generate more accurate knowledge on Fusarium species profile and mycotoxins associated and better establish the climatic change impact on wheat Fusarium epidemiology.
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Hafez M, Gourlie R, Telfer M, Schatz N, Turkington TK, Beres B, Aboukhaddour R. Diversity of Fusarium spp. Associated with Wheat Node and Grain in Representative Sites Across the Western Canadian Prairies. PHYTOPATHOLOGY 2022; 112:1003-1015. [PMID: 34818906 DOI: 10.1094/phyto-06-21-0241-r] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Fusarium head blight (FHB) and Fusarium crown and root rot (FCRR) are major wheat diseases. Populations of FHB and FCRR pathogens are highly dynamic, and shifts in these populations in different regions is reported. Analyzing fungal populations associated with wheat node and grain tissues collected from different regions can provide useful information and predict diseases that might affect subsequent crops and effective disease management practices. In this study, wheat node and grain samples were collected from four representative sites across the western Canadian prairies in the 2018 growing season to characterize the major Fusarium spp. and other mycobiota associated with wheat in these regions. In total, 994 fungal isolates were recovered, and based on culture and molecular diagnostic methods, three genera constituted over 90% of all fungal isolates, namely Alternaria (39.6%), Fusarium (27.8%), and Parastagonospora (23.9%). A quantitative PCR (qPCR) diagnostic toolkit was developed to quantify the most frequently isolated Fusarium spp. in infected wheat tissues: Fusarium avenaceum, F. culmorum, F. graminearum, and F. poae. This qPCR specificity was validated in silico, in vitro, and in planta and proved specific to the target species. The qPCR results showed that F. graminearum was not detected frequently from wheat node and grain samples collected from four locations in this study. F. poae was the most abundant Fusarium species in grain samples in all tested locations. However, in node samples, F. culmorum (Beaverlodge and Scott) and F. avenaceum (Lacombe and Lethbridge) were the most abundant species. Trichothecene genotyping showed that the 3ADON is the most dominant trichothecene genotype (68%), followed by type-A trichothecenes (29.5%), whereas the 15ADON trichothecene genotype was least dominant (2.5%) and the NIV genotype was not detected. Moreover, a total of 129 translation elongation factor 1-alpha (TEF1α) sequences from nine Fusarium spp. were compared at the haplotype level to evaluate genetic variability and distribution. F. avenaceum and F. poae exhibited higher diversity as reflected by higher number of haplotypes present in these two species compared with the rest.
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Affiliation(s)
- Mohamed Hafez
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Center, Lethbridge, Alberta T1J 4B1, Canada
| | - Ryan Gourlie
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Center, Lethbridge, Alberta T1J 4B1, Canada
| | - Melissa Telfer
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Center, Lethbridge, Alberta T1J 4B1, Canada
| | - Nicola Schatz
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Center, Lethbridge, Alberta T1J 4B1, Canada
| | - Thomas K Turkington
- Agriculture and Agri-Food Canada, Lacombe Research and Development Center, Lacombe, Alberta T4L 1V7, Canada
| | - Brian Beres
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Center, Lethbridge, Alberta T1J 4B1, Canada
| | - Reem Aboukhaddour
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Center, Lethbridge, Alberta T1J 4B1, Canada
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Del Ponte EM, Moreira GM, Ward TJ, O'Donnell K, Nicolli CP, Machado FJ, Duffeck MR, Alves KS, Tessmann DJ, Waalwijk C, van der Lee T, Zhang H, Chulze SN, Stenglein SA, Pan D, Vero S, Vaillancourt LJ, Schmale DG, Esker PD, Moretti A, Logrieco AF, Kistler HC, Bergstrom GC, Viljoen A, Rose LJ, van Coller GJ, Lee T. Fusarium graminearum Species Complex: A Bibliographic Analysis and Web-Accessible Database for Global Mapping of Species and Trichothecene Toxin Chemotypes. PHYTOPATHOLOGY 2022; 112:741-751. [PMID: 34491796 DOI: 10.1094/phyto-06-21-0277-rvw] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Fusarium graminearum is ranked among the five most destructive fungal pathogens that affect agroecosystems. It causes floral diseases in small grain cereals including wheat, barley, and oats, as well as maize and rice. We conducted a systematic review of peer-reviewed studies reporting species within the F. graminearum species complex (FGSC) and created two main data tables. The first contained summarized data from the articles including bibliographic, geographic, methodological (ID methods), host of origin and species, while the second data table contains information about the described strains such as publication, isolate code(s), host/substrate, year of isolation, geographical coordinates, species and trichothecene genotype. Analyses of the bibliographic data obtained from 123 publications from 2000 to 2021 by 498 unique authors and published in 40 journals are summarized. We describe the frequency of species and chemotypes for 16,274 strains for which geographical information was available, either provided as raw data or extracted from the publications, and sampled across six continents and 32 countries. The database and interactive interface are publicly available, allowing for searches, summarization, and mapping of strains according to several criteria including article, country, host, species and trichothecene genotype. The database will be updated as new articles are published and should be useful for guiding future surveys and exploring factors associated with species distribution such as climate and land use. Authors are encouraged to submit data at the strain level to the database, which is accessible at https://fgsc.netlify.app.
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Affiliation(s)
- Emerson M Del Ponte
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900 Brazil
| | - Gláucia M Moreira
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900 Brazil
| | - Todd J Ward
- Agricultural Research Service, National Center for Agricultural Utilization Research, U.S. Department of Agriculture, Peoria 61604, U.S.A
| | - Kerry O'Donnell
- Agricultural Research Service, National Center for Agricultural Utilization Research, U.S. Department of Agriculture, Peoria 61604, U.S.A
| | - Camila P Nicolli
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900 Brazil
| | - Franklin J Machado
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900 Brazil
| | - Maíra R Duffeck
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900 Brazil
| | - Kaique S Alves
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900 Brazil
| | - Dauri J Tessmann
- Departamento de Agronomia, Universidade Estadual de Maringá, Maringá, PR, 87020-900 Brazil
| | - Cees Waalwijk
- Biointeractions & Plant Health, Wageningen Plant Research, Wageningen, 6708PB, The Netherlands
| | - Theo van der Lee
- Biointeractions & Plant Health, Wageningen Plant Research, Wageningen, 6708PB, The Netherlands
| | - Hao Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Sofia N Chulze
- Universidad Nacional de Río Cuarto, Río Cuarto, 5800 Argentina
| | - Sebastian A Stenglein
- Laboratorio de Biología Funcional y Biotecnología, Facultad de Agronomía, Universidad Nacional del Centro, Buenos Aires, 7300, Argentina
| | - Dinorah Pan
- Universidad de la República, Facultad de Ciencias-Facultad de Ingeniería, Montevideo, 11800, Uruguay
| | - Silvana Vero
- Universidad de la República, Facultad de Ciencias-Facultad de Ingeniería, Montevideo, 11800, Uruguay
| | - Lisa J Vaillancourt
- Department of Plant Pathology, University of Kentucky, Lexington, 40546-0312, U.S.A
| | - David G Schmale
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, 24061-0390, U.S.A
| | - Paul D Esker
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, 16802, U.S.A
| | - Antonio Moretti
- National Research Council of Research, Institute of Sciences of Food Production, 70126 Bari, Italy
| | - Antonio F Logrieco
- National Research Council of Research, Institute of Sciences of Food Production, 70126 Bari, Italy
| | - H Corby Kistler
- Agricultural Research Service, Cereal Disease Laboratory, U.S. Department of Agriculture, St. Paul 55108, U.S.A
| | - Gary C Bergstrom
- School of Integrative Plant Science, Plant Pathology and Plant-Microbe Biology Section, Cornell University, Ithaca 14853-5904, U.S.A
| | - Altus Viljoen
- Department of Plant Pathology, Stellenbosch University, Stellenbosch, 7602, South Africa
| | - Lindy J Rose
- Department of Plant Pathology, Stellenbosch University, Stellenbosch, 7602, South Africa
| | - Gert J van Coller
- Plant Science, Western Cape Department of Agriculture, Elsenburg, 7607, South Africa
| | - Theresa Lee
- Microbial Safety Team, National Institute of Agricultural Sciences, Wanju, 55365, Republic of Korea
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Wu L, Fredua-Agyeman R, Strelkov SE, Chang KF, Hwang SF. Identification of Quantitative Trait Loci Associated With Partial Resistance to Fusarium Root Rot and Wilt Caused by Fusarium graminearum in Field Pea. FRONTIERS IN PLANT SCIENCE 2022; 12:784593. [PMID: 35126415 PMCID: PMC8812527 DOI: 10.3389/fpls.2021.784593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 12/10/2021] [Indexed: 06/14/2023]
Abstract
Fusarium root rot, caused by a complex of Fusarium spp., is a major disease of field pea (Pisum sativum). The development of genetic resistance is the most promising approach to manage the disease, but no pea germplasm has been identified that is completely resistant to root rot. The aim of this study was to detect quantitative trait loci (QTL) conferring partial resistance to root rot and wilting, caused by five fungal isolates representing Fusarium solani, F. avenaceum, F. acuminatum, F. proliferatum, and F. graminearum. Evaluation of the root rot-tolerant cultivar "00-2067" and susceptible cultivar "Reward" was carried out with the five species. There was a significant difference (p < 0.001) between the mean root rot values of the two cultivars inoculated with the F. avenaceum (F4A) and F. graminearum (FG2) isolates. Therefore, in the QTL study, the F8 recombinant inbred line (RIL) population derived from "Reward" × "00-2067" was inoculated in the greenhouse (4 ×) with only F4A and FG2. The parents and F8 population were genotyped using 13.2K single nucleotide polymorphisms (SNPs) and 222 simple sequence repeat (SSR) markers. A significant genotypic effect (p < 0.05) and high heritability (79% to 92.1%) were observed for disease severity, vigor, and plant height following inoculation with F4A and FG2. Significant correlation coefficients were detected among and within all traits. This suggested that a high proportion of the genetic variance was transmitted from the parents to the progeny. However, no significant QTL (LOD > 3) were detected for the RILs inoculated with F4A. In the case of the RILs inoculated with FG2, 5 QTL for root rot severity and 3 QTL each for vigor and plant height were detected. The most stable QTL for plant height (Hgt-Ps3.1) was detected on Chrom5/LGIII. The two most stable QTL for partial resistance to FG2, Fg-Ps4.1, and Fg-Ps4.2 were located in a 15.1-cM and 11.2-cM genomic region, respectively, on Chrom4/LGIV. The most stable QTL for vigor (Vig-Ps4.1) was found in the same region. Twenty-five major and moderate effect digenic epistatic interactions were detected. The identified region on chrom4/LGIV could be important for resistance breeding and marker development.
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Affiliation(s)
| | | | | | | | - Sheau-Fang Hwang
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, Canada
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Chen L, Yang J, Wang H, Yang X, Zhang C, Zhao Z, Wang J. NX toxins: New threat posed by Fusarium graminearum species complex. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2021.11.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Hafez M, Abdelmagid A, Aboukhaddour R, Adam LR, Daayf F. Fusarium Root Rot Complex in Soybean: Molecular Characterization, Trichothecene Formation, and Cross-Pathogenicity. PHYTOPATHOLOGY 2021; 111:2287-2302. [PMID: 33938238 DOI: 10.1094/phyto-03-21-0083-r] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Soybean is threatened by many pathogens that negatively affect this crop's yield and quality, such as various Fusarium species that cause wilting and root rot diseases. Fusarium root rot (FRR) in soybean can be caused by F. graminearum and other Fusarium spp. that are associated with Fusarium head blight (FHB) in cereals. Therefore, it was important to inquire whether Fusarium pathogens from soybean can cause disease in wheat and vice versa. Here, we investigated the FRR complex in Manitoba (Canada) from symptomatic plants, using both culture- and molecular-based methods. We developed a molecular diagnostic toolkit to detect and differentiate between several Fusarium spp. involved in FHB and FRR, then we evaluated cross-pathogenicity of selected Fusarium isolates collected from soybean and wheat, and the results indicate that isolates recovered from one host can infect the other host. Trichothecene production by selected Fusarium spp. was also analyzed chemically via liquid chromatography mass spectrometry in both soybean (root) and wheat (spike) tissues. Trichothecenes were also analyzed in soybean seeds from plants with FRR to check the potentiality of trichothecene translocation from infected roots to the seeds. All of the tested Fusarium isolates were capable of producing trichothecenes in wheat spikes and soybean roots, but no trichothecenes were detected in soybean seeds. This study provided evidence, for the first time, that trichothecenes were produced by several Fusarium spp. (F. cerealis, F. culmorum, and F. sporotrichioides) during FRR development in soybean.
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Affiliation(s)
- Mohamed Hafez
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, R3T2N2, Canada
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Center, Lethbridge, Alberta, Canada
- Department of Botany and Microbiology, Faculty of Science, Suez University, Suez, Egypt
| | - Ahmed Abdelmagid
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, R3T2N2, Canada
- Department of Plant Pathology, Assiut University, Assiut, 71515, Egypt
| | - Reem Aboukhaddour
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Center, Lethbridge, Alberta, Canada
| | - Lorne R Adam
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, R3T2N2, Canada
| | - Fouad Daayf
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, R3T2N2, Canada
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Gagkaeva T, Orina A, Gavrilova O. Fusarium head blight in the Russian Far East: 140 years after description of the 'drunken bread' problem. PeerJ 2021; 9:e12346. [PMID: 34760369 PMCID: PMC8557700 DOI: 10.7717/peerj.12346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 09/29/2021] [Indexed: 11/20/2022] Open
Abstract
The first appearance of Fusarium head blight (FHB)—and the beginning of scientific research of this disease—occurred the Far East region of Russia at the end of the 19th century. In the summer of 2019, in the Amur region, which comprises 60–70% of grain production in the Russian Far East, flooding caused a state of emergency. The quality of wheat and barley grains grown under natural conditions of FHB outbreaks, including grain infection, fungal species composition, DNA content of F. graminearum and chemotypes, and the presence of various mycotoxins, was studied. Fusarium infection rates reached extremely high percentages, 51–98%, the majority of which were F. graminearum infections. The amount of F. graminearum DNA in wheat grain samples was higher than in the barley grain samples and averaged 6.1 and 2.1 pg/ng, respectively. The content of deoxynivalenol (DON) in the wheat samples reached 13,343 ppb and in barley reached 7,755 ppb. A multilocus genotyping assay was conducted on the partially sequenced fragments of the translation elongation factor EF-1a, ammonium ligase gene, reductase gene, and 3-O-acetyltransferase gene in 29 Fusarium graminearum sensu lato strains from the grain harvested in the Amur region. All strains from the Far East region were characterized as F. graminearum sensu stricto; 70% were the 15-AcDON chemotype, while the other strains were the 3-AcDON chemotype. According to the results, after 140 years of study of FHB, we are still not very successful in controlling this disease if conditions are favorable for pathogen development. Even at present, some of the grain harvested must be destroyed, as high contamination of mycotoxins renders it unusable.
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Affiliation(s)
- Tatiana Gagkaeva
- Laboratory of Mycology and Phytopathology, All-Russian Institute of Plant Protection, St. Petersburg, Pushkin, Russian Federation
| | - Aleksandra Orina
- Laboratory of Mycology and Phytopathology, All-Russian Institute of Plant Protection, St. Petersburg, Pushkin, Russian Federation
| | - Olga Gavrilova
- Laboratory of Mycology and Phytopathology, All-Russian Institute of Plant Protection, St. Petersburg, Pushkin, Russian Federation
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Xi K, Shan L, Yang Y, Zhang G, Zhang J, Guo W. Species Diversity and Chemotypes of Fusarium Species Associated With Maize Stalk Rot in Yunnan Province of Southwest China. Front Microbiol 2021; 12:652062. [PMID: 34759893 PMCID: PMC8575069 DOI: 10.3389/fmicb.2021.652062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 07/21/2021] [Indexed: 11/13/2022] Open
Abstract
Maize stalk rot caused by Fusarium species is one of the most important fungal diseases of maize throughout the world. The disease is responsible for considerable yield losses and has also been associated with mycotoxin contamination of the crop. In this study, a survey of maize stalk rot was performed in seven locations of Yunnan Province in China during the cropping season of 2015 and 2016. Based on morphological and molecular characteristics, 204 isolates belonging to 12 Fusarium spp. from symptomatic stalks of maize were identified. Among the isolated strains, 83 were identified as Fusarium meridionale (40.5%), 46 as Fusarium boothii (22.5%), 34 as Fusarium temperatum (16.5%), 12 as Fusarium equiseti (5.9%), 10 as Fusarium asiaticum (4.9%), six as Fusarium proliferatum (3.0%), four as Fusarium verticillioides (2.0%), four as Fusarium incarnatum (2.0%), two as Fusarium avenaceum (1.0%), one as Fusarium cerealis (0.5%), one as Fusarium graminearum (0.5%), and one as Fusarium cortaderiae (0.5%). Fusarium cortaderiae was the first report on the causal agent of maize stalk rot disease in China. These isolates were divided into five chemotypes: nivalenol (NIV), deoxynivalenol (DON), beauvericin (BEA), zearalenone (ZEN), and fumonisin (FUM). Phylogenetic analysis based on partial sequences of the translation elongation factor 1α (TEF1-α) showed a high degree of interspecific polymorphisms among the isolates. Pathogenicity analysis on maize stalks indicated that all the 12 species of Fusarium were able to cause the disease symptoms with different aggressiveness. This study on population, pathogenicity, and toxigenic chemotypes of Fusarium species associated with maize stalk rot in Yunnan Province of southwest China, will help design an effective integrated control strategy for this disease.
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Affiliation(s)
- Kaifei Xi
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Agro-Products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Liuying Shan
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Agro-Products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Yini Yang
- The Central Agricultural Broadcasting and Television School, Beijing, China
| | - Guoqing Zhang
- General Office of the Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Jun Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Agro-Products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Wei Guo
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Agro-Products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs, Beijing, China
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13
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Tralamazza SM, Abraham LN, Reyes-Avila CS, Corrêa B, Croll D. Histone H3K27 methylation perturbs transcriptional robustness and underpins dispensability of highly conserved genes in fungi. Mol Biol Evol 2021; 39:6424003. [PMID: 34751371 PMCID: PMC8789075 DOI: 10.1093/molbev/msab323] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Epigenetic modifications are key regulators of gene expression and underpin genome integrity. Yet, how epigenetic changes affect the evolution and transcriptional robustness of genes remains largely unknown. Here, we show how the repressive histone mark H3K27me3 underpins the trajectory of highly conserved genes in fungi. We first performed transcriptomic profiling on closely related species of the plant pathogen Fusarium graminearum species complex. We determined transcriptional responsiveness of genes across environmental conditions to determine expression robustness. To infer evolutionary conservation, we used a framework of 23 species across the Fusarium genus including three species covered with histone methylation data. Gene expression variation is negatively correlated with gene conservation confirming that highly conserved genes show higher expression robustness. In contrast, genes marked by H3K27me3 do not show such associations. Furthermore, highly conserved genes marked by H3K27me3 encode smaller proteins, exhibit weaker codon usage bias, higher levels of hydrophobicity, show lower intrinsically disordered regions, and are enriched for functions related to regulation and membrane transport. The evolutionary age of conserved genes with H3K27me3 histone marks falls typically within the origins of the Fusarium genus. We show that highly conserved genes marked by H3K27me3 are more likely to be dispensable for survival during host infection. Lastly, we show that conserved genes exposed to repressive H3K27me3 marks across distantly related Fusarium fungi are associated with transcriptional perturbation at the microevolutionary scale. In conclusion, we show how repressive histone marks are entangled in the evolutionary fate of highly conserved genes across evolutionary timescales.
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Affiliation(s)
- Sabina Moser Tralamazza
- Laboratory of Evolutionary Genetics, Institute of Biology, University of Neuchatel, Switzerland.,Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Brazil
| | - Leen Nanchira Abraham
- Laboratory of Evolutionary Genetics, Institute of Biology, University of Neuchatel, Switzerland
| | | | - Benedito Corrêa
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Brazil
| | - Daniel Croll
- Laboratory of Evolutionary Genetics, Institute of Biology, University of Neuchatel, Switzerland
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Leslie JF, Moretti A, Mesterházy Á, Ameye M, Audenaert K, Singh PK, Richard-Forget F, Chulze SN, Ponte EMD, Chala A, Battilani P, Logrieco AF. Key Global Actions for Mycotoxin Management in Wheat and Other Small Grains. Toxins (Basel) 2021; 13:725. [PMID: 34679018 PMCID: PMC8541216 DOI: 10.3390/toxins13100725] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 09/22/2021] [Accepted: 09/29/2021] [Indexed: 01/23/2023] Open
Abstract
Mycotoxins in small grains are a significant and long-standing problem. These contaminants may be produced by members of several fungal genera, including Alternaria, Aspergillus, Fusarium, Claviceps, and Penicillium. Interventions that limit contamination can be made both pre-harvest and post-harvest. Many problems and strategies to control them and the toxins they produce are similar regardless of the location at which they are employed, while others are more common in some areas than in others. Increased knowledge of host-plant resistance, better agronomic methods, improved fungicide management, and better storage strategies all have application on a global basis. We summarize the major pre- and post-harvest control strategies currently in use. In the area of pre-harvest, these include resistant host lines, fungicides and their application guided by epidemiological models, and multiple cultural practices. In the area of post-harvest, drying, storage, cleaning and sorting, and some end-product processes were the most important at the global level. We also employed the Nominal Group discussion technique to identify and prioritize potential steps forward and to reduce problems associated with human and animal consumption of these grains. Identifying existing and potentially novel mechanisms to effectively manage mycotoxin problems in these grains is essential to ensure the safety of humans and domesticated animals that consume these grains.
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Affiliation(s)
- John F. Leslie
- Throckmorton Plant Sciences Center, Department of Plant Pathology, 1712 Claflin Avenue, Kansas State University, Manhattan, KS 66506, USA;
| | - Antonio Moretti
- Institute of the Science of Food Production, National Research Council (CNR-ISPA), Via Amendola 122/O, 70126 Bari, Italy;
| | - Ákos Mesterházy
- Cereal Research Non-Profit Ltd., Alsókikötő sor 9, H-6726 Szeged, Hungary;
| | - Maarten Ameye
- Department of Plant and Crops, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium; (M.A.); (K.A.)
| | - Kris Audenaert
- Department of Plant and Crops, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium; (M.A.); (K.A.)
| | - Pawan K. Singh
- International Maize and Wheat Improvement Center (CIMMYT), Apdo. Postal 6-641, Mexico 06600, DF, Mexico;
| | | | - Sofía N. Chulze
- Research Institute on Mycology and Mycotoxicology (IMICO), National Scientific and Technical Research Council-National University of Río Cuarto (CONICET-UNRC), 5800 Río Cuarto, Córdoba, Argentina;
| | - Emerson M. Del Ponte
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa 36570-900, MG, Brazil;
| | - Alemayehu Chala
- College of Agriculture, Hawassa University, P.O. Box 5, Hawassa 1000, Ethiopia;
| | - Paola Battilani
- Department of Sustainable Crop Production, Faculty of Agriculture, Food and Environmental Sciences, Universitá Cattolica del Sacro Cuore, via E. Parmense, 84-29122 Piacenza, Italy;
| | - Antonio F. Logrieco
- Institute of the Science of Food Production, National Research Council (CNR-ISPA), Via Amendola 122/O, 70126 Bari, Italy;
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15
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Xu F, Liu W, Song Y, Zhou Y, Xu X, Yang G, Wang J, Zhang J, Liu L. The Distribution of Fusarium graminearum and Fusarium asiaticum Causing Fusarium Head Blight of Wheat in Relation to Climate and Cropping System. PLANT DISEASE 2021; 105:2830-2835. [PMID: 33881919 DOI: 10.1094/pdis-01-21-0013-re] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In the main wheat production area of China (the Huang Huai Plain [HHP]), both Fusarium graminearum and Fusarium asiaticum, the causal agents of Fusarium head blight (FHB), are present. We investigated whether the relative prevalence of F. graminearum and F. asiaticum is related to cropping systems and/or climate factors. A total of 1,844 Fusarium isolates were obtained from 103 fields of two cropping systems: maize-wheat and rice-wheat rotations. To maximize the differences in climatic conditions, isolates were sampled from the north and south HHP regions. Based on the phylogenetic analysis of EF-1α and Tri101 sequences, 1,207 of the 1,844 isolates belonged to F. graminearum, and the remaining 637 isolates belonged to F. asiaticum. The former was predominant in the northern region: 1,022 of the 1,078 Fusarium isolates in the north were F. graminearum. The latter was predominant in the southern region: 581 of the 766 Fusarium isolates belonged to F. asiaticum. Using an analysis based on generalized linear modeling, the relative prevalence of the two species was associated more with climatic conditions than with the cropping system. F. graminearum was associated with drier conditions and cooler conditions during the winter but also with warmer conditions in the infection and grain-colonization period as well as with maize-wheat rotation. The opposite was true for F. asiaticum. Except for the 15-acetyldeoxynvalenol genotype, the trichothecene chemotype composition of F. asiaticum differed between the two cropping systems. The 3-acetyldeoxynivalenol genotype was more prevalent in the maize-wheat rotation, whereas the nivalenol genotype was more prevalent in the rice-wheat rotation. The results also suggested that environmental conditions in the overwintering period appeared to be more important than those in the infection, grain-colonization, and preanthesis sporulation periods in affecting the relative prevalence of F. graminearum and F. asiaticum. More research is needed to study the effect of overwintering conditions on subsequent epidemic in the following spring.
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Affiliation(s)
- Fei Xu
- Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, China
- Key Laboratory of Integrated Pest Management on Crops in Southern Part of North China, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Zhengzhou, Henan 450002, China
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Wei Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Yuli Song
- Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, China
- Key Laboratory of Integrated Pest Management on Crops in Southern Part of North China, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Zhengzhou, Henan 450002, China
| | - Yilin Zhou
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Xiangming Xu
- National Institute of Agricultural Botany East Malling Research, East Malling, Kent ME19 6BJ, United Kingdom
| | - Gongqiang Yang
- Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, China
- Key Laboratory of Integrated Pest Management on Crops in Southern Part of North China, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Zhengzhou, Henan 450002, China
| | - Junmei Wang
- Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, China
- Key Laboratory of Integrated Pest Management on Crops in Southern Part of North China, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Zhengzhou, Henan 450002, China
| | - Jiaojiao Zhang
- Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, China
| | - Lulu Liu
- Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, Henan 450002, China
- Key Laboratory of Integrated Pest Management on Crops in Southern Part of North China, Ministry of Agriculture and Rural Affairs of the People's Republic of China, Zhengzhou, Henan 450002, China
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16
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Xu C, Chen H, Wu Q, Wu Y, Daly P, Chen J, Yang H, Wei L, Zhuang Y. Trehalose-6-phosphate phosphatase inhibitor: N-(phenylthio) phthalimide, which can inhibit the DON biosynthesis of Fusarium graminearum. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2021; 178:104917. [PMID: 34446193 DOI: 10.1016/j.pestbp.2021.104917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 06/29/2021] [Accepted: 07/01/2021] [Indexed: 06/13/2023]
Abstract
Fusarium head blight(FHB)caused by Fusarium graminearum species complex (FGSC) is one of the most important diseases around the world. Deoxynivalenol (DON) is a type of mycotoxin produced by FGSC when infecting cereal crops. It is a serious threat to the health of both humans and livestock. Trehalose-6-phosphate phosphatase (TPP), a conserved metabolic enzyme found in many plants and pathogens, catalyzes the formation of trehalose. N-(phenylthio) phthalimide (NPP) has been reported to inhibit the normal growth of nematodes by inhibiting the activity of TPP, but this inhibitor of nematodes has not previously been tested against F. graminearum. In this study, we found that TPP in F. graminearum (FgTPP) had similar secondary structures and conserved cysteine (Cys356) to nematodes by means of bioinformatics. At the same time, the sensitivity of F. graminearum strains to NPP was determined. NPP exhibited a better inhibitory effect on conidia germination than mycelial growth. In addition, the effects of NPP on DON biosynthesis and trehalose biosynthesis pathway in PH-1 were also determined. We found that NPP decreased DON production, trehalose content, glucose content and TPP enzyme activity but increased trehalose-6-phosphate content and trehalose-6-phosphate synthase (TPS) enzyme activity. Moreover, the expression of TRI1, TRI4, TRI5, TRI6, and TPP genes were downregulated, on the contrary, the TPS gene was upregulated. Finally, in order to further determine the control ability of NPP on DON production in the field, we conducted a series of field experiments, and found that NPP could effectively reduce the DON content in wheat grain and had a general control effect on FHB. In conclusion, the research in this study will provide important theoretical basis for controlling FHB caused by F. graminearum and reducing DON production in the field.
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Affiliation(s)
- Chao Xu
- Zhenjiang Academy of Agricultural Sciences, Jiangsu Academy of Agricultural Sciences, Jurong 212400, China.
| | - Hongzhou Chen
- Zhenjiang Academy of Agricultural Sciences, Jiangsu Academy of Agricultural Sciences, Jurong 212400, China
| | - Qinyan Wu
- Zhenjiang Academy of Agricultural Sciences, Jiangsu Academy of Agricultural Sciences, Jurong 212400, China
| | - Yuqi Wu
- College of Life Sciences, Jiangsu University, Zhenjiang 212013, China
| | - Paul Daly
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Jian Chen
- Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Science, Nanjing 210014, China
| | - Hongfu Yang
- Zhenjiang Academy of Agricultural Sciences, Jiangsu Academy of Agricultural Sciences, Jurong 212400, China
| | - Lihui Wei
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Yiqing Zhuang
- Testing Center, Jiangsu Academy of Agricultural Science, Nanjing 210014, China.
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17
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Evolution of Fusarium Head Blight Management in Wheat: Scientific Perspectives on Biological Control Agents and Crop Genotypes Protocooperation. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11198960] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Over the past century, the economically devastating Fusarium Head Blight (FHB) disease has persistently ravished small grain cereal crops worldwide. Annually, losses globally are in the billions of United States dollars (USD), with common bread wheat and durum wheat accounting for a major portion of these losses. Since the unforgettable FHB epidemics of the 1990s and early 2000s in North America, different management strategies have been employed to treat this disease. However, even with some of the best practices including chemical fungicides and innovative breeding technological advances that have given rise to a spectrum of moderately resistant cultivars, FHB still remains an obstinate problem in cereal farms globally. This is in part due to several constraints such as the Fusarium complex of species and the struggle to develop and employ methods that can effectively combat more than one pathogenic line or species simultaneously. This review highlights the last 100 years of major FHB epidemics in the US and Canada, as well as the evolution of different management strategies, and recent progress in resistance and cultivar development. It also takes a look at protocooperation between specific biocontrol agents and cereal genotypes as a promising tool for combatting FHB.
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18
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Manawasinghe IS, Phillips AJL, Xu J, Balasuriya A, Hyde KD, Stępień Ł, Harischandra DL, Karunarathna A, Yan J, Weerasinghe J, Luo M, Dong Z, Cheewangkoon R. Defining a species in fungal plant pathology: beyond the species level. FUNGAL DIVERS 2021. [DOI: 10.1007/s13225-021-00481-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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19
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Fungal Genomic Resources for Strain Identification and Diversity Analysis of 1900 Fungal Species. J Fungi (Basel) 2021; 7:jof7040288. [PMID: 33921243 PMCID: PMC8070597 DOI: 10.3390/jof7040288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 11/17/2022] Open
Abstract
Identification and diversity analysis of fungi is greatly challenging. Though internal transcribed spacer (ITS), region-based DNA fingerprinting works as a “gold standard” for most of the fungal species group, it cannot differentiate between all the groups and cryptic species. Therefore, it is of paramount importance to find an alternative approach for strain differentiation. Availability of whole genome sequence data of nearly 2000 fungal species are a promising solution to such requirement. We present whole genome sequence-based world’s largest microsatellite database, FungSatDB having >19M loci obtained from >1900 fungal species/strains using >4000 assemblies across globe. Genotyping efficacy of FungSatDB has been evaluated by both in-silico and in-vitro PCR. By in silico PCR, 66 strains of 8 countries representing four continents were successfully differentiated. Genotyping efficacy was also evaluated by in vitro PCR in four fungal species. This approach overcomes limitation of ITS in species, strain signature, and diversity analysis. It can accelerate fungal genomic research endeavors in agriculture, industrial, and environmental management.
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20
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Crous P, Lombard L, Sandoval-Denis M, Seifert K, Schroers HJ, Chaverri P, Gené J, Guarro J, Hirooka Y, Bensch K, Kema G, Lamprecht S, Cai L, Rossman A, Stadler M, Summerbell R, Taylor J, Ploch S, Visagie C, Yilmaz N, Frisvad J, Abdel-Azeem A, Abdollahzadeh J, Abdolrasouli A, Akulov A, Alberts J, Araújo J, Ariyawansa H, Bakhshi M, Bendiksby M, Ben Hadj Amor A, Bezerra J, Boekhout T, Câmara M, Carbia M, Cardinali G, Castañeda-Ruiz R, Celis A, Chaturvedi V, Collemare J, Croll D, Damm U, Decock C, de Vries R, Ezekiel C, Fan X, Fernández N, Gaya E, González C, Gramaje D, Groenewald J, Grube M, Guevara-Suarez M, Gupta V, Guarnaccia V, Haddaji A, Hagen F, Haelewaters D, Hansen K, Hashimoto A, Hernández-Restrepo M, Houbraken J, Hubka V, Hyde K, Iturriaga T, Jeewon R, Johnston P, Jurjević Ž, Karalti İ, Korsten L, Kuramae E, Kušan I, Labuda R, Lawrence D, Lee H, Lechat C, Li H, Litovka Y, Maharachchikumbura S, Marin-Felix Y, Matio Kemkuignou B, Matočec N, McTaggart A, Mlčoch P, Mugnai L, Nakashima C, Nilsson R, Noumeur S, Pavlov I, Peralta M, Phillips A, Pitt J, Polizzi G, Quaedvlieg W, Rajeshkumar K, Restrepo S, Rhaiem A, Robert J, Robert V, Rodrigues A, Salgado-Salazar C, Samson R, Santos A, Shivas R, Souza-Motta C, Sun G, Swart W, Szoke S, Tan Y, Taylor J, Taylor P, Tiago P, Váczy K, van de Wiele N, van der Merwe N, Verkley G, Vieira W, Vizzini A, Weir B, Wijayawardene N, Xia J, Yáñez-Morales M, Yurkov A, Zamora J, Zare R, Zhang C, Thines M. Fusarium: more than a node or a foot-shaped basal cell. Stud Mycol 2021; 98:100116. [PMID: 34466168 PMCID: PMC8379525 DOI: 10.1016/j.simyco.2021.100116] [Citation(s) in RCA: 97] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Recent publications have argued that there are potentially serious consequences for researchers in recognising distinct genera in the terminal fusarioid clade of the family Nectriaceae. Thus, an alternate hypothesis, namely a very broad concept of the genus Fusarium was proposed. In doing so, however, a significant body of data that supports distinct genera in Nectriaceae based on morphology, biology, and phylogeny is disregarded. A DNA phylogeny based on 19 orthologous protein-coding genes was presented to support a very broad concept of Fusarium at the F1 node in Nectriaceae. Here, we demonstrate that re-analyses of this dataset show that all 19 genes support the F3 node that represents Fusarium sensu stricto as defined by F. sambucinum (sexual morph synonym Gibberella pulicaris). The backbone of the phylogeny is resolved by the concatenated alignment, but only six of the 19 genes fully support the F1 node, representing the broad circumscription of Fusarium. Furthermore, a re-analysis of the concatenated dataset revealed alternate topologies in different phylogenetic algorithms, highlighting the deep divergence and unresolved placement of various Nectriaceae lineages proposed as members of Fusarium. Species of Fusarium s. str. are characterised by Gibberella sexual morphs, asexual morphs with thin- or thick-walled macroconidia that have variously shaped apical and basal cells, and trichothecene mycotoxin production, which separates them from other fusarioid genera. Here we show that the Wollenweber concept of Fusarium presently accounts for 20 segregate genera with clear-cut synapomorphic traits, and that fusarioid macroconidia represent a character that has been gained or lost multiple times throughout Nectriaceae. Thus, the very broad circumscription of Fusarium is blurry and without apparent synapomorphies, and does not include all genera with fusarium-like macroconidia, which are spread throughout Nectriaceae (e.g., Cosmosporella, Macroconia, Microcera). In this study four new genera are introduced, along with 18 new species and 16 new combinations. These names convey information about relationships, morphology, and ecological preference that would otherwise be lost in a broader definition of Fusarium. To assist users to correctly identify fusarioid genera and species, we introduce a new online identification database, Fusarioid-ID, accessible at www.fusarium.org. The database comprises partial sequences from multiple genes commonly used to identify fusarioid taxa (act1, CaM, his3, rpb1, rpb2, tef1, tub2, ITS, and LSU). In this paper, we also present a nomenclator of names that have been introduced in Fusarium up to January 2021 as well as their current status, types, and diagnostic DNA barcode data. In this study, researchers from 46 countries, representing taxonomists, plant pathologists, medical mycologists, quarantine officials, regulatory agencies, and students, strongly support the application and use of a more precisely delimited Fusarium (= Gibberella) concept to accommodate taxa from the robust monophyletic node F3 on the basis of a well-defined and unique combination of morphological and biochemical features. This F3 node includes, among others, species of the F. fujikuroi, F. incarnatum-equiseti, F. oxysporum, and F. sambucinum species complexes, but not species of Bisifusarium [F. dimerum species complex (SC)], Cyanonectria (F. buxicola SC), Geejayessia (F. staphyleae SC), Neocosmospora (F. solani SC) or Rectifusarium (F. ventricosum SC). The present study represents the first step to generating a new online monograph of Fusarium and allied fusarioid genera (www.fusarium.org).
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Key Words
- Apiognomonia platani (Lév.) L. Lombard
- Atractium ciliatum Link
- Atractium pallidum Bonord.
- Calloria tremelloides (Grev.) L. Lombard
- Cephalosporium sacchari E.J. Butler
- Cosmosporella cavisperma (Corda) Sand.-Den., L. Lombard & Crous
- Cylindrodendrum orthosporum (Sacc. & P. Syd.) L. Lombard
- Dialonectria volutella (Ellis & Everh.) L. Lombard & Sand.-Den.
- Fusarium aeruginosum Delacr.
- Fusarium agaricorum Sarrazin
- Fusarium albidoviolaceum Dasz.
- Fusarium aleyrodis Petch
- Fusarium amentorum Lacroix
- Fusarium annuum Leonian
- Fusarium arcuatum Berk. & M.A. Curtis
- Fusarium aridum O.A. Pratt
- Fusarium armeniacum (G.A. Forbes et al.) L.W. Burgess & Summerell
- Fusarium arthrosporioides Sherb.
- Fusarium asparagi Delacr.
- Fusarium batatas Wollenw.
- Fusarium biforme Sherb.
- Fusarium buharicum Jacz. ex Babajan & Teterevn.-Babajan
- Fusarium cactacearum Pasin. & Buzz.-Trav.
- Fusarium cacti-maxonii Pasin. & Buzz.-Trav.
- Fusarium caudatum Wollenw.
- Fusarium cavispermum Corda
- Fusarium cepae Hanzawa
- Fusarium cesatii Rabenh.
- Fusarium citriforme Jamal.
- Fusarium citrinum Wollenw.
- Fusarium citrulli Taubenh.
- Fusarium clavatum Sherb.
- Fusarium coccinellum Kalchbr.
- Fusarium cromyophthoron Sideris
- Fusarium cucurbitae Taubenh.
- Fusarium cuneiforme Sherb.
- Fusarium delacroixii Sacc.
- Fusarium dimerum var. nectrioides Wollenw.
- Fusarium echinatum Sand.-Den. & G.J. Marais
- Fusarium epicoccum McAlpine
- Fusarium eucheliae Sartory, R. Sartory & J. Mey.
- Fusarium fissum Peyl
- Fusarium flocciferum Corda
- Fusarium gemmiperda Aderh.
- Fusarium genevense Dasz.
- Fusarium graminearum Schwabe
- Fusarium graminum Corda
- Fusarium heterosporioides Fautrey
- Fusarium heterosporum Nees & T. Nees
- Fusarium idahoanum O.A. Pratt
- Fusarium juruanum Henn.
- Fusarium lanceolatum O.A. Pratt
- Fusarium lateritium Nees
- Fusarium loncheceras Sideris
- Fusarium longipes Wollenw. & Reinking
- Fusarium lyarnte J.L. Walsh, Sangal., L.W. Burgess, E.C.Y. Liew & Summerell
- Fusarium malvacearum Taubenh.
- Fusarium martii f. phaseoli Burkh.
- Fusarium muentzii Delacr.
- Fusarium nigrum O.A. Pratt
- Fusarium oxysporum var. asclerotium Sherb.
- Fusarium palczewskii Jacz.
- Fusarium palustre W.H. Elmer & Marra
- Fusarium polymorphum Matr.
- Fusarium poolense Taubenh.
- Fusarium prieskaense G.J. Marais & Sand.-Den.
- Fusarium prunorum McAlpine
- Fusarium pusillum Wollenw.
- Fusarium putrefaciens Osterw.
- Fusarium redolens Wollenw.
- Fusarium reticulatum Mont.
- Fusarium rhizochromatistes Sideris
- Fusarium rhizophilum Corda
- Fusarium rhodellum McAlpine
- Fusarium roesleri Thüm.
- Fusarium rostratum Appel & Wollenw.
- Fusarium rubiginosum Appel & Wollenw.
- Fusarium rubrum Parav.
- Fusarium samoense Gehrm.
- Fusarium scirpi Lambotte & Fautrey
- Fusarium secalis Jacz.
- Fusarium spinaciae Hungerf.
- Fusarium sporotrichioides Sherb.
- Fusarium stercoris Fuckel
- Fusarium stilboides Wollenw.
- Fusarium stillatum De Not. ex Sacc.
- Fusarium sublunatum Reinking
- Fusarium succisae Schröt. ex Sacc.
- Fusarium tabacivorum Delacr.
- Fusarium trichothecioides Wollenw.
- Fusarium tritici Liebman
- Fusarium tuberivorum Wilcox & G.K. Link
- Fusarium tumidum var. humi Reinking
- Fusarium ustilaginis Kellerm. & Swingle
- Fusarium viticola Thüm.
- Fusarium werrikimbe J.L. Walsh, L.W. Burgess, E.C.Y. Liew & B.A. Summerell
- Fusarium willkommii Lindau
- Fusarium xylarioides Steyaert
- Fusarium zygopetali Delacr.
- Fusicolla meniscoidea L. Lombard & Sand.-Den.
- Fusicolla quarantenae J.D.P. Bezerra, Sand.-Den., Crous & Souza-Motta
- Fusicolla sporellula Sand.-Den. & L. Lombard
- Fusisporium andropogonis Cooke ex Thüm.
- Fusisporium anthophilum A. Braun
- Fusisporium arundinis Corda
- Fusisporium avenaceum Fr.
- Fusisporium clypeaster Corda
- Fusisporium culmorum Wm.G. Sm.
- Fusisporium didymum Harting
- Fusisporium elasticae Thüm.
- Fusisporium episphaericum Cooke & Ellis
- Fusisporium flavidum Bonord.
- Fusisporium hordei Wm.G. Sm.
- Fusisporium incarnatum Roberge ex Desm.
- Fusisporium lolii Wm.G. Sm.
- Fusisporium pandani Corda
- Gibberella phyllostachydicola W. Yamam.
- Hymenella aurea (Corda) L. Lombard
- Hymenella spermogoniopsis (Jul. Müll.) L. Lombard & Sand.-Den.
- Luteonectria Sand.-Den., L. Lombard, Schroers & Rossman
- Luteonectria albida (Rossman) Sand.-Den. & L. Lombard
- Luteonectria nematophila (Nirenberg & Hagedorn) Sand.-Den. & L. Lombard
- Macroconia bulbipes Crous & Sand.-Den.
- Macroconia phlogioides Sand.-Den. & Crous
- Menispora penicillata Harz
- Multi-gene phylogeny
- Mycotoxins
- Nectriaceae
- Neocosmospora
- Neocosmospora epipeda Quaedvl. & Sand.-Den.
- Neocosmospora floridana (T. Aoki et al.) L. Lombard & Sand.-Den.
- Neocosmospora merkxiana Quaedvl. & Sand.-Den.
- Neocosmospora neerlandica Crous & Sand.-Den.
- Neocosmospora nelsonii Crous & Sand.-Den.
- Neocosmospora obliquiseptata (T. Aoki et al.) L. Lombard & Sand.-Den.
- Neocosmospora pseudopisi Sand.-Den. & L. Lombard
- Neocosmospora rekana (Lynn & Marinc.) L. Lombard & Sand.-Den.
- Neocosmospora tuaranensis (T. Aoki et al.) L. Lombard & Sand.-Den.
- Nothofusarium Crous, Sand.-Den. & L. Lombard
- Nothofusarium devonianum L. Lombard, Crous & Sand.-Den.
- Novel taxa
- Pathogen
- Scolecofusarium L. Lombard, Sand.-Den. & Crous
- Scolecofusarium ciliatum (Link) L. Lombard, Sand.-Den. & Crous
- Selenosporium equiseti Corda
- Selenosporium hippocastani Corda
- Selenosporium sarcochroum Desm
- Selenosporium urticearum Corda.
- Setofusarium (Nirenberg & Samuels) Crous & Sand.-Den.
- Setofusarium setosum (Samuels & Nirenberg) Sand.-Den. & Crous.
- Sphaeria sanguinea var. cicatricum Berk.
- Sporotrichum poae Peck.
- Stylonectria corniculata Gräfenhan, Crous & Sand.-Den.
- Stylonectria hetmanica Akulov, Crous & Sand.-Den.
- Taxonomy
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Affiliation(s)
- P.W. Crous
- Westerdijk Fungal Biodiversity Institute, 3508 AD, Utrecht, the Netherlands
- Wageningen University and Research Centre (WUR), Laboratory of Phytopathology, Droevendaalsesteeg 1, 6708 PB, Wageningen, the Netherlands
| | - L. Lombard
- Westerdijk Fungal Biodiversity Institute, 3508 AD, Utrecht, the Netherlands
| | - M. Sandoval-Denis
- Westerdijk Fungal Biodiversity Institute, 3508 AD, Utrecht, the Netherlands
- Netherlands Institute of Ecology (NIOO-KNAW), Department of Microbial Ecology, Droevendaalsesteeg 10, 6708 PB, Wageningen, the Netherlands
| | - K.A. Seifert
- Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
| | - H.-J. Schroers
- Plant Protection Department, Agricultural Institute of Slovenia, Hacquetova ulica 17, 1000, Ljubljana, Slovenia
| | - P. Chaverri
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, MD, USA
- Escuela de Biología and Centro de Investigaciones en Productos Naturales, Universidad de Costa Rica, San Pedro, Costa Rica
| | - J. Gené
- Unitat de Micologia, Facultat de Medicina i Ciències de la Salut i Institut d’Investigació Sanitària Pere Virgili (IISPV), Universitat Rovira i Virgili, 43201, Reus, Spain
| | - J. Guarro
- Unitat de Micologia, Facultat de Medicina i Ciències de la Salut i Institut d’Investigació Sanitària Pere Virgili (IISPV), Universitat Rovira i Virgili, 43201, Reus, Spain
| | - Y. Hirooka
- Department of Clinical Plant Science, Faculty of Bioscience, Hosei University, 3-7-2 Kajino-cho, Koganei, Tokyo, 184-8584, Japan
| | - K. Bensch
- Westerdijk Fungal Biodiversity Institute, 3508 AD, Utrecht, the Netherlands
| | - G.H.J. Kema
- Wageningen University and Research Centre (WUR), Laboratory of Phytopathology, Droevendaalsesteeg 1, 6708 PB, Wageningen, the Netherlands
| | - S.C. Lamprecht
- ARC-Plant Health and Protection, Private Bag X5017, Stellenbosch, 7599, Western Cape, South Africa
| | - L. Cai
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - A.Y. Rossman
- Department of Botany & Plant Pathology, Oregon State University, Corvallis, OR, 97330, USA
| | - M. Stadler
- Department of Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany
| | - R.C. Summerbell
- Sporometrics, Toronto, ON, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
| | - J.W. Taylor
- Plant and Microbial Biology, 111 Koshland Hall, University of California, Berkeley, CA, 94720-3102, USA
| | - S. Ploch
- Senckenberg Biodiversity and Climate Research Center, Senckenberganlage 25, D-60325, Frankfurt am Main, Germany
| | - C.M. Visagie
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), Faculty of Natural and Agricultural Sciences, University of Pretoria, P. Bag X20, Hatfield, 0028, Pretoria, South Africa
| | - N. Yilmaz
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), Faculty of Natural and Agricultural Sciences, University of Pretoria, P. Bag X20, Hatfield, 0028, Pretoria, South Africa
| | - J.C. Frisvad
- Department of Biotechnology and Biomedicine, DTU-Bioengineering, Technical University of Denmark, 2800, Kongens Lyngby, Denmark
| | - A.M. Abdel-Azeem
- Systematic Mycology Lab., Botany and Microbiology Department, Faculty of Science, Suez Canal University, Ismailia, 41522, Egypt
| | - J. Abdollahzadeh
- Department of Plant Protection, Faculty of Agriculture, University of Kurdistan, P.O. Box 416, Sanandaj, Iran
| | - A. Abdolrasouli
- Department of Medical Microbiology, King's College Hospital, London, UK
- Department of Infectious Diseases, Imperial College London, London, UK
| | - A. Akulov
- Department of Mycology and Plant Resistance, V. N. Karazin Kharkiv National University, Maidan Svobody 4, 61022, Kharkiv, Ukraine
| | - J.F. Alberts
- Department of Food Science and Technology, Cape Peninsula University of Technology, P.O. Box 1906, Bellville, 7535, South Africa
| | - J.P.M. Araújo
- School of Forest Resources and Conservation, University of Florida, Gainesville, FL, USA
| | - H.A. Ariyawansa
- Department of Plant Pathology and Microbiology, College of Bio-Resources and Agriculture, National Taiwan University, No.1, Sec.4, Roosevelt Road, Taipei, 106, Taiwan, ROC
| | - M. Bakhshi
- Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), P.O. Box 19395-1454, Tehran, Iran
| | - M. Bendiksby
- Natural History Museum, University of Oslo, Norway
- Department of Natural History, NTNU University Museum, Trondheim, Norway
| | - A. Ben Hadj Amor
- Westerdijk Fungal Biodiversity Institute, 3508 AD, Utrecht, the Netherlands
| | - J.D.P. Bezerra
- Setor de Micologia/Departamento de Biociências e Tecnologia, Instituto de Patologia Tropical e Saúde Pública, Rua 235 - s/n – Setor Universitário - CEP: 74605-050, Universidade Federal de Goiás/Federal University of Goiás, Goiânia, Brazil
| | - T. Boekhout
- Westerdijk Fungal Biodiversity Institute, 3508 AD, Utrecht, the Netherlands
| | - M.P.S. Câmara
- Departamento de Agronomia, Universidade Federal Rural de Pernambuco, Recife, 52171-900, PE, Brazil
| | - M. Carbia
- Departamento de Parasitología y Micología, Instituto de Higiene, Facultad de Medicina – Universidad de la República, Av. A. Navarro 3051, Montevideo, Uruguay
| | - G. Cardinali
- Department of Pharmaceutical Science, University of Perugia, Via Borgo 20 Giugno, 74 Perugia, Italy
| | - R.F. Castañeda-Ruiz
- Instituto de Investigaciones Fundamentales en Agricultura Tropical Alejandro de Humboldt (INIFAT), Académico Titular de la Academia de Ciencias de, Cuba
| | - A. Celis
- Grupo de Investigación Celular y Molecular de Microorganismos Patógenos (CeMoP), Departamento de Ciencias Biológicas, Universidad de Los Andes, Bogotá, 111711, Colombia
| | - V. Chaturvedi
- Mycology Laboratory, New York State Department of Health Wadsworth Center, Albany, NY, USA
| | - J. Collemare
- Westerdijk Fungal Biodiversity Institute, 3508 AD, Utrecht, the Netherlands
| | - D. Croll
- Laboratory of Evolutionary Genetics, Institute of Biology, University of Neuchatel, CH-2000, Neuchatel, Switzerland
| | - U. Damm
- Senckenberg Museum of Natural History Görlitz, PF 300 154, 02806, Görlitz, Germany
| | - C.A. Decock
- Mycothèque de l'Université catholique de Louvain (MUCL, BCCMTM), Earth and Life Institute – ELIM – Mycology, Université catholique de Louvain, Croix du Sud 2 bte L7.05.06, B-1348, Louvain-la-Neuve, Belgium
| | - R.P. de Vries
- Westerdijk Fungal Biodiversity Institute, 3508 AD, Utrecht, the Netherlands
| | - C.N. Ezekiel
- Department of Microbiology, Babcock University, Ilishan Remo, Ogun State, Nigeria
| | - X.L. Fan
- The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing, 100083, China
| | - N.B. Fernández
- Laboratorio de Micología Clínica, Hospital de Clínicas, Universidad de Buenos Aires, Buenos Aires, Argentina
- Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - E. Gaya
- Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3DS, UK
| | - C.D. González
- Laboratorio de Salud de Bosques y Ecosistemas, Instituto de Conservación, Biodiversidad y Territorio, Facultad de Ciencias Forestales y Recursos Naturales, Universidad Austral de Chile, casilla 567, Valdivia, Chile
| | - D. Gramaje
- Institute of Grapevine and Wine Sciences (ICVV), Spanish National Research Council (CSIC)-University of La Rioja-Government of La Rioja, Logroño, 26007, Spain
| | - J.Z. Groenewald
- Westerdijk Fungal Biodiversity Institute, 3508 AD, Utrecht, the Netherlands
| | - M. Grube
- Institut für Biologie, Karl-Franzens-Universität Graz, Holteigasse 6, 8010, Graz, Austria
| | - M. Guevara-Suarez
- Applied genomics research group, Universidad de los Andes, Cr 1 # 18 a 12, Bogotá, Colombia
| | - V.K. Gupta
- Center for Safe and Improved Food, Scotland's Rural College (SRUC), Kings Buildings, West Mains Road, Edinburgh, EH9 3JG, UK
- Biorefining and Advanced Materials Research Center, Scotland's Rural College (SRUC), Kings Buildings, West Mains Road, Edinburgh, EH9 3JG, UK
| | - V. Guarnaccia
- Department of Agricultural, Forestry and Food Sciences (DISAFA), University of Torino, Largo P. Braccini 2, 10095, Grugliasco, TO, Italy
| | | | - F. Hagen
- Westerdijk Fungal Biodiversity Institute, 3508 AD, Utrecht, the Netherlands
| | - D. Haelewaters
- Research Group Mycology, Department of Biology, Ghent University, 35 K.L. Ledeganckstraat, 9000, Ghent, Belgium
- Faculty of Science, University of South Bohemia, Branišovská 31, 370 05, České Budějovice, Czech Republic
| | - K. Hansen
- Department of Botany, Swedish Museum of Natural History, P.O. Box 50007, SE-104 05, Stockholm, Sweden
| | - A. Hashimoto
- Microbe Division/Japan Collection of Microorganisms RIKEN BioResource Research Center, 3-1-1 Koyadai, Tsukuba, Ibaraki, 305-0074, Japan
| | | | - J. Houbraken
- Westerdijk Fungal Biodiversity Institute, 3508 AD, Utrecht, the Netherlands
| | - V. Hubka
- Department of Botany, Charles University in Prague, Prague, Czech Republic
| | - K.D. Hyde
- Center of Excellence in Fungal Research, Mae Fah Luang University, Chaing Rai, 57100, Thailand
| | - T. Iturriaga
- Cornell University, 334 Plant Science Building, Ithaca, NY, 14850, USA
| | - R. Jeewon
- Department of Health Sciences, Faculty of Medicine and Health Sciences, University of Mauritius, Reduit, Mauritius
| | - P.R. Johnston
- Manaaki Whenua Landcare Research, Private Bag 92170, Auckland, 1142, New Zealand
| | - Ž. Jurjević
- EMSL Analytical, Inc., 200 Route 130 North, Cinnaminson, NJ, 08077, USA
| | - İ. Karalti
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Yeditepe University, Turkey
| | - L. Korsten
- Department of Plant and Soil Sciences, University of Pretoria, P. Bag X20 Hatfield, Pretoria, 0002, South Africa
| | - E.E. Kuramae
- Netherlands Institute of Ecology (NIOO-KNAW), Department of Microbial Ecology, Droevendaalsesteeg 10, 6708 PB, Wageningen, the Netherlands
- Institute of Environmental Biology, Ecology and Biodiversity, Utrecht University, 3584 CH, Utrecht, the Netherlands
| | - I. Kušan
- Laboratory for Biological Diversity, Ruđer Bošković Institute, Bijenička cesta 54, HR-10000, Zagreb, Croatia
| | - R. Labuda
- University of Veterinary Medicine, Vienna (VetMed), Institute of Food Safety, Food Technology and Veterinary Public Health, Veterinaerplatz 1, 1210 Vienna and BiMM – Bioactive Microbial Metabolites group, 3430 Tulln a.d. Donau, Austria
| | - D.P. Lawrence
- University of California, Davis, One Shields Ave., Davis, CA, 95616, USA
| | - H.B. Lee
- Department of Agricultural Biological Chemistry, College of Agriculture & Life Sciences, Chonnam National University, Yongbong-Dong 300, Buk-Gu, Gwangju, 61186, South Korea
| | - C. Lechat
- Ascofrance, 64 route de Chizé, 79360, Villiers-en-Bois, France
| | - H.Y. Li
- The Key Laboratory of Molecular Biology of Crop Pathogens and Insects of Ministry of Agriculture, The Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Institute of Biotechnology, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Y.A. Litovka
- V.N. Sukachev Institute of Forest SB RAS, Laboratory of Reforestation, Mycology and Plant Pathology, Krasnoyarsk, 660036, Russia
- Reshetnev Siberian State University of Science and Technology, Department of Chemical Technology of Wood and Biotechnology, Krasnoyarsk, 660037, Russia
| | - S.S.N. Maharachchikumbura
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Y. Marin-Felix
- Department of Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany
| | - B. Matio Kemkuignou
- Department of Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany
| | - N. Matočec
- Laboratory for Biological Diversity, Ruđer Bošković Institute, Bijenička cesta 54, HR-10000, Zagreb, Croatia
| | - A.R. McTaggart
- Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Ecosciences Precinct, G.P.O. Box 267, Brisbane, 4001, Australia
| | - P. Mlčoch
- Department of Botany, Faculty of Science, Palacký University Olomouc, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - L. Mugnai
- Department of Agricultural, Food, Environmental and Forestry Science and Technology (DAGRI), Plant Pathology and Entomology section, University of Florence, P.le delle Cascine 28, 50144, Firenze, Italy
| | - C. Nakashima
- Graduate school of Bioresources, Mie University, Kurima-machiya 1577, Tsu, Mie, 514-8507, Japan
| | - R.H. Nilsson
- Gothenburg Global Biodiversity Center at the Department of Biological and Environmental Sciences, University of Gothenburg, Box 461, 405 30, Gothenburg, Sweden
| | - S.R. Noumeur
- Department of Microbiology and Biochemistry, Faculty of Natural and Life Sciences, University of Batna 2, Batna, 05000, Algeria
| | - I.N. Pavlov
- V.N. Sukachev Institute of Forest SB RAS, Laboratory of Reforestation, Mycology and Plant Pathology, Krasnoyarsk, 660036, Russia
- Reshetnev Siberian State University of Science and Technology, Department of Chemical Technology of Wood and Biotechnology, Krasnoyarsk, 660037, Russia
| | - M.P. Peralta
- Laboratorio de Micodiversidad y Micoprospección, PROIMI-CONICET, Av. Belgrano y Pje. Caseros, Argentina
| | - A.J.L. Phillips
- Universidade de Lisboa, Faculdade de Ciências, Biosystems and Integrative Sciences Institute (BioISI), Campo Grande, 1749-016, Lisbon, Portugal
| | - J.I. Pitt
- Microbial Screening Technologies, 28 Percival Rd, Smithfield, NSW, 2164, Australia
| | - G. Polizzi
- Dipartimento di Agricoltura, Alimentazione e Ambiente, sez. Patologia vegetale, University of Catania, Via S. Sofia 100, 95123 Catania, Italy
| | - W. Quaedvlieg
- Phytopathology, Van Zanten Breeding B.V., Lavendelweg 15, 1435 EW, Rijsenhout, the Netherlands
| | - K.C. Rajeshkumar
- National Fungal Culture Collection of India (NFCCI), Biodiversity and Palaeobiology (Fungi) Group, Agharkar Research Institute, Pune, Maharashtra, 411 004, India
| | - S. Restrepo
- Laboratory of Mycology and Phytopathology – (LAMFU), Department of Chemical and Food Engineering, Universidad de los Andes, Cr 1 # 18 a 12, Bogotá, Colombia
| | - A. Rhaiem
- Plant Pathology and Population Genetics, Laboratory of Microorganisms, National Gene Bank, Tunisia
| | | | - V. Robert
- Westerdijk Fungal Biodiversity Institute, 3508 AD, Utrecht, the Netherlands
| | - A.M. Rodrigues
- Laboratory of Emerging Fungal Pathogens, Department of Microbiology, Immunology, and Parasitology, Discipline of Cellular Biology, Federal University of São Paulo (UNIFESP), São Paulo, 04023062, Brazil
| | - C. Salgado-Salazar
- USDA-ARS Mycology & Nematology Genetic Diversity & Biology Laboratory, Bldg. 010A, Rm. 212, BARC-West, 10300 Baltimore Ave, Beltsville, MD, 20705, USA
| | - R.A. Samson
- Westerdijk Fungal Biodiversity Institute, 3508 AD, Utrecht, the Netherlands
| | - A.C.S. Santos
- Departamento de Micologia Prof. Chaves Batista, Universidade Federal de Pernambuco, Centro de Biociências, Cidade Universitária, Av. Prof. Moraes Rego, s/n, Recife, PE, CEP: 50670-901, Brazil
| | - R.G. Shivas
- Centre for Crop Health, University of Southern Queensland, Toowoomba, 4350, Queensland, Australia
| | - C.M. Souza-Motta
- Departamento de Micologia Prof. Chaves Batista, Universidade Federal de Pernambuco, Centro de Biociências, Cidade Universitária, Av. Prof. Moraes Rego, s/n, Recife, PE, CEP: 50670-901, Brazil
| | - G.Y. Sun
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, China
| | - W.J. Swart
- Faculty of Natural and Agricultural Sciences, Department of Plant Sciences, University of the Free State, P.O. Box 339, Bloemfontein, 9300, South Africa
| | | | - Y.P. Tan
- Centre for Crop Health, University of Southern Queensland, Toowoomba, 4350, Queensland, Australia
- Queensland Plant Pathology Herbarium, Department of Agriculture and Fisheries, Dutton Park, Queensland, 4102, Australia
| | - J.E. Taylor
- Royal Botanic Garden Edinburgh, 20A Inverleith Row, Edinburgh, EH3 5LR, United Kingdom
| | - P.W.J. Taylor
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC, 3010, Australia
| | - P.V. Tiago
- Departamento de Micologia Prof. Chaves Batista, Universidade Federal de Pernambuco, Centro de Biociências, Cidade Universitária, Av. Prof. Moraes Rego, s/n, Recife, PE, CEP: 50670-901, Brazil
| | - K.Z. Váczy
- Food and Wine Research Institute, Eszterházy Károly University, 6 Leányka Street, H-3300, Eger, Hungary
| | | | - N.A. van der Merwe
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), Faculty of Natural and Agricultural Sciences, University of Pretoria, P. Bag X20, Hatfield, 0028, Pretoria, South Africa
| | - G.J.M. Verkley
- Westerdijk Fungal Biodiversity Institute, 3508 AD, Utrecht, the Netherlands
| | - W.A.S. Vieira
- Departamento de Agronomia, Universidade Federal Rural de Pernambuco, Recife, 52171-900, PE, Brazil
| | - A. Vizzini
- Department of Life Sciences and Systems Biology, University of Torino and Institute for Sustainable Plant Protection (IPSP-SS Turin), C.N.R, Viale P.A. Mattioli, 25, I-10125, Torino, Italy
| | - B.S. Weir
- Manaaki Whenua Landcare Research, Private Bag 92170, Auckland, 1142, New Zealand
| | - N.N. Wijayawardene
- Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan, 655011, China
| | - J.W. Xia
- Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, College of Plant Protection, Shandong Agricultural University, Taian, 271018, China
| | - M.J. Yáñez-Morales
- Fitosanidad, Colegio de Postgraduados-Campus Montecillo, Montecillo-Texcoco, 56230 Edo. de Mexico, Mexico
| | - A. Yurkov
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures GmbH, Inhoffenstrasse 7 B, 38124, Braunschweig, Germany
| | - J.C. Zamora
- Museum of Evolution, Uppsala University, Norbyvägen 16, SE-752 36, Uppsala, Sweden
| | - R. Zare
- Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), P.O. Box 19395-1454, Tehran, Iran
| | - C.L. Zhang
- Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, College of Agriculture and Biotechnology, Zhejiang University, No. 866 Yuhangtang Road, Hangzhou, 310058, China
| | - M. Thines
- Senckenberg Biodiversity and Climate Research Center, Senckenberganlage 25, D-60325, Frankfurt am Main, Germany
- Goethe-University Frankfurt am Main, Department of Biological Sciences, Institute of Ecology, Evolution and Diversity, Max-von-Laue Str. 13, D-60438, Frankfurt am Main, Germany
- LOEWE Centre for Translational Biodiversity Genomics, Georg-Voigt-Str. 14-16, D-60325, Frankfurt am Main, Germany
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21
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Laraba I, McCormick SP, Vaughan MM, Geiser DM, O’Donnell K. Phylogenetic diversity, trichothecene potential, and pathogenicity within Fusarium sambucinum species complex. PLoS One 2021; 16:e0245037. [PMID: 33434214 PMCID: PMC7802971 DOI: 10.1371/journal.pone.0245037] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 12/21/2020] [Indexed: 01/01/2023] Open
Abstract
The Fusarium sambucinum species complex (FSAMSC) is one of the most taxonomically challenging groups of fusaria, comprising prominent mycotoxigenic plant pathogens and other species with various lifestyles. Among toxins produced by members of the FSAMSC, trichothecenes pose the most significant threat to public health. Herein a global collection of 171 strains, originating from diverse hosts or substrates, were selected to represent FSAMSC diversity. This strain collection was used to assess their species diversity, evaluate their potential to produce trichothecenes, and cause disease on wheat. Maximum likelihood and Bayesian analyses of a combined 3-gene dataset used to infer evolutionary relationships revealed that the 171 strains originally received as 48 species represent 74 genealogically exclusive phylogenetically distinct species distributed among six strongly supported clades: Brachygibbosum, Graminearum, Longipes, Novel, Sambucinum, and Sporotrichioides. Most of the strains produced trichothecenes in vitro but varied in type, indicating that the six clades correspond to type A, type B, or both types of trichothecene-producing lineages. Furthermore, five strains representing two putative novel species within the Sambucinum Clade produced two newly discovered type A trichothecenes, 15-keto NX-2 and 15-keto NX-3. Strains of the two putatively novel species together with members of the Graminearum Clade were aggressive toward wheat when tested for pathogenicity on heads of the susceptible cultivar Apogee. In planta, the Graminearum Clade strains produced nivalenol or deoxynivalenol and the aggressive Sambucinum Clade strains synthesized NX-3 and 15-keto NX-3. Other strains within the Brachygibbosum, Longipes, Novel, Sambucinum, and Sporotrichioides Clades were nonpathogenic or could infect the inoculated floret without spreading within the head. Moreover, most of these strains did not produce any toxin in the inoculated spikelets. These data highlight aggressiveness toward wheat appears to be influenced by the type of toxin produced and that it is not limited to members of the Graminearum Clade.
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Affiliation(s)
- Imane Laraba
- USDA, Agricultural Research Service, National Center for Agricultural Utilization Research, Mycotoxin Prevention and Applied Microbiology Research Unit. 1815 N. University, Peoria, IL, United States of America
| | - Susan P. McCormick
- USDA, Agricultural Research Service, National Center for Agricultural Utilization Research, Mycotoxin Prevention and Applied Microbiology Research Unit. 1815 N. University, Peoria, IL, United States of America
| | - Martha M. Vaughan
- USDA, Agricultural Research Service, National Center for Agricultural Utilization Research, Mycotoxin Prevention and Applied Microbiology Research Unit. 1815 N. University, Peoria, IL, United States of America
| | - David M. Geiser
- Department of Plant Pathology and Environmental Microbiology, Pennsylvania State University, University Park, Pennsylvania, PA, United States of America
| | - Kerry O’Donnell
- USDA, Agricultural Research Service, National Center for Agricultural Utilization Research, Mycotoxin Prevention and Applied Microbiology Research Unit. 1815 N. University, Peoria, IL, United States of America
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22
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Dong F, Zhang X, Xu JH, Shi JR, Lee YW, Chen XY, Li YP, Mokoena MP, Olaniran AO. Analysis of Fusarium graminearum Species Complex from Freshly Harvested Rice in Jiangsu Province (China). PLANT DISEASE 2020; 104:2138-2143. [PMID: 32539593 DOI: 10.1094/pdis-01-20-0084-re] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Members of Fusarium graminearum species complex (FGSC) are the major pathogens that cause Fusarium head blight (FHB) in cereals worldwide. Symptoms of FHB on rice, including dark staining or browning of rice glumes, were recently observed in Jiangsu Province, China. To improve our understanding of the pathogens involved, 201 FGSC isolates were obtained from freshly harvested rice samples and identified by phylogenetic analyses. Among the 201 FGSC isolates, 196 were F. asiaticum and the remaining 5 were F. graminearum. Trichothecene chemotype and chemical analyses showed that 68.4% of the F. asiaticum isolates were the 3-acetyldeoxynivalenol (3ADON) chemotype and the remainder were the nivalenol (NIV) chemotype. All of the F. graminearum isolates were the 15-acetyldeoxynivalenol chemotype. Pathogenicity assays showed that both the 3ADON and NIV chemotypes of F. asiaticum could infect wheat and rice spikes. FHB severity and trichothecene toxin analysis revealed that F. asiaticum with the NIV chemotype was less aggressive than that with the 3ADON chemotype in wheat, while the NIV-producing strains were more virulent than the 3ADON-producing strains in rice. F. asiaticum isolates with different chemotypes did not show significant differences in mycelial growth, sporulation, conidial dimensions, or perithecial production. These findings would provide useful information for developing management strategies for the control of FHB in China.
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Affiliation(s)
- Fei Dong
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- School of Life Sciences, University of KwaZulu-Natal, Durban X54001, South Africa
| | - Xiao Zhang
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Jian Hong Xu
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Jian Rong Shi
- Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/Key Laboratory for Agro-product Safety Risk Evaluation (Nanjing), Ministry of Agriculture and Rural Affairs/Collaborative Innovation Center for Modern Grain Circulation and Safety/Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- School of Life Sciences, University of KwaZulu-Natal, Durban X54001, South Africa
| | - Yin-Won Lee
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
| | - Xin Yuan Chen
- College of Marine Life and Fisheries, Jiangsu Ocean University, Lianyungang 222005, China
| | - Yun Peng Li
- Sanquan College of Xinxiang Medical University, Xinxiang 453003, China
| | - Mduduzi P Mokoena
- School of Life Sciences, University of KwaZulu-Natal, Durban X54001, South Africa
| | - Ademola O Olaniran
- School of Life Sciences, University of KwaZulu-Natal, Durban X54001, South Africa
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23
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Ma Z, Xie Q, Li G, Jia H, Zhou J, Kong Z, Li N, Yuan Y. Germplasms, genetics and genomics for better control of disastrous wheat Fusarium head blight. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2020; 133:1541-1568. [PMID: 31900498 DOI: 10.1007/s00122-019-03525-8] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 12/23/2019] [Indexed: 05/20/2023]
Abstract
Fusarium head blight (FHB), or scab, for its devastating nature to wheat production and food security, has stimulated worldwide attention. Multidisciplinary efforts have been made to fight against FHB for a long time, but the great progress has been achieved only in the genomics era of the past 20 years, particularly in the areas of resistance gene/QTL discovery, resistance mechanism elucidation and molecular breeding for better resistance. This review includes the following nine main sections, (1) FHB incidence, epidemic and impact, (2) causal Fusarium species, distribution and virulence, (3) types of host resistance to FHB, (4) germplasm exploitation for FHB resistance, (5) genetic control of FHB resistance, (6) fine mapping of Fhb1, Fhb2, Fhb4 and Fhb5, (7) cloning of Fhb1, (8) omics-based gene discovery and resistance mechanism study and (9) breeding for better FHB resistance. The advancements that have been made are outstanding and exciting; however, judged by the complicated nature of resistance to hemi-biotrophic pathogens like Fusarium species and lack of immune germplasm, it is still a long way to go to overcome FHB.
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Affiliation(s)
- Zhengqiang Ma
- Crop Genomics and Bioinformatics Center and National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, Jiangsu, China.
| | - Quan Xie
- Crop Genomics and Bioinformatics Center and National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Guoqiang Li
- Crop Genomics and Bioinformatics Center and National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Haiyan Jia
- Crop Genomics and Bioinformatics Center and National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Jiyang Zhou
- Crop Genomics and Bioinformatics Center and National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Zhongxin Kong
- Crop Genomics and Bioinformatics Center and National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Na Li
- Crop Genomics and Bioinformatics Center and National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Yang Yuan
- Crop Genomics and Bioinformatics Center and National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, Jiangsu, China
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24
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Moura RD, de Castro LAM, Culik MP, Fernandes AAR, Fernandes PMB, Ventura JA. Culture medium for improved production of conidia for identification and systematic studies of Fusarium pathogens. J Microbiol Methods 2020; 173:105915. [PMID: 32259530 DOI: 10.1016/j.mimet.2020.105915] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 04/03/2020] [Accepted: 04/03/2020] [Indexed: 11/17/2022]
Abstract
Fusarium guttiforme and Fusarium ananatum are the etiological agents of fusariosis and fruitlet core rot in pineapple, respectively, producing mycotoxins that are harmful to the health of consumers. These two fungi are morphologically similar and difficulty in obtaining macroconidia of the species limits their identification. Different types of media are available for the culture of these pathogens, but not all of them favor F. ananatum and F. guttiforme macroconidia production. Therefore, the objective of this study was to develop a simple culture medium to improve rapid macro- and microconidia formation in both F. guttiforme and F. ananatum to facilitate taxonomic, pathogenicity and mycotoxin studies. In vitro analysis showed that basal medium with carboxymethyl cellulose (CMC) was better than other media tested with the highest macroconidia production at 7 days of incubation. The highest production of microconidia was with synthetic nutrient medium (SN) at 7 days. F. ananatum produced a relatively high number of microconidia with one septum in comparison to F. guttiforme when cultured in CMC, which suggests an additional character useful for Fusarium taxonomy. CMC medium may serve as an improved alternative to culture media currently used in Fusarium research and contribute to further knowledge of the taxonomy and mycotoxins of Fusarium species.
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Affiliation(s)
- Raíssa Debacker Moura
- Biotechnology Core, Federal University of Espirito Santo, Av. Marechal Campos, 1468, Maruípe, 29043-910 Vitória, ES, Brazil.
| | - Luiza Adami Monteiro de Castro
- Biotechnology Core, Federal University of Espirito Santo, Av. Marechal Campos, 1468, Maruípe, 29043-910 Vitória, ES, Brazil
| | - Mark Paul Culik
- Capixaba Institute of Research, Technical Assistance and Rural Extension, INCAPER, Vitória, Espírito Santo, Brazil
| | | | | | - José Aires Ventura
- Capixaba Institute of Research, Technical Assistance and Rural Extension, INCAPER, Vitória, Espírito Santo, Brazil
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25
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Hafez M, Abdelmagid A, Adam LR, Daayf F. Specific Detection and Identification of Fusarium graminearum Sensu Stricto Using a PCR-RFLP Tool and Specific Primers Targeting the Translational Elongation Factor 1α Gene. PLANT DISEASE 2020; 104:1076-1086. [PMID: 32031910 DOI: 10.1094/pdis-03-19-0572-re] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Fusarium graminearum is a toxigenic plant pathogen that causes Fusarium head blight (FHB) disease on cereal crops. It has recently shown to have cross-pathogenicity on noncereals (i.e., Fusarium root rot [FRR] on soybean) in Canada and elsewhere. Specific detection and differentiation of this potent toxigenic, trichothecene-producing pathogen among other closely related species is extremely important for disease control and mycotoxin monitoring. Here, we designed a PCR restriction fragment length polymorphism protocol based on the DNA sequence of the translational elongation factor 1α (TEF1α) gene. A unique restriction site to the enzyme HpaII is only found in F. graminearum sensu stricto strains among different Fusarium strains in the F. graminearum species complex (FGSC) and other Fusarium spp. associated with FHB in cereals and FRR in soybean. Partial amplification of the TEF1α gene with newly designed primers mh1/mh2 generated a 459-bp PCR fragment. Restriction digestion of the generated fragments with the HpaII enzyme generated a unique restriction pattern that can rapidly and accurately differentiate F. graminearum sensu stricto among all other Fusarium spp. A primer pair (FgssF/FgssR) specific to F. graminearum sensu stricto also was designed and can distinguish F. graminearum sensu stricto from all other Fusarium spp. in the FGSC and other closely related Fusarium spp. involved in FHB and FRR. This finding will be very useful for the specific detection of F. graminearum sensu stricto for diagnostic purposes as well as for the accurate detection of this pathogen in breeding and other research purposes.
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Affiliation(s)
- Mohamed Hafez
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, R3T2N2, Canada
- Department of Botany and Microbiology, Faculty of Science, Suez University, Suez, Egypt
| | - Ahmed Abdelmagid
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, R3T2N2, Canada
- Department of Plant Pathology, Assiut University, Assiut,71515, Egypt
| | - Lorne R Adam
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, R3T2N2, Canada
| | - Fouad Daayf
- Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, R3T2N2, Canada
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26
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Shi W, Xiang L, Yu D, Gong S, Yang L. Impact of the biofungicide tetramycin on the development of Fusarium head blight, grain yield and deoxynivalenol accumulation in wheat. WORLD MYCOTOXIN J 2020. [DOI: 10.3920/wmj2019.2494] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Fusarium graminearum causes Fusarium head blight (FHB), a devastating disease that leads to extensive yield and quality loss in wheat and barley production. Integrated pest management (IPM) is required to control this disease and biofungicides, such as tetramycin, could be a novel addition to IPM strategies. The current study investigated in vitro tetramycin toxicity in Fusarium graminearum and evaluated its effectiveness for the control of Fusarium head blight FHB. Tetramycin was shown to affect three key aspects of Fusarium pathogenicity: spore germination, mycelium growth and deoxynivalenol (DON) production. The in vitro results indicated that tetramycin had strong inhibitory activity on the mycelial growth and spore germination. Field trials indicated that tetramycin treatment resulted in a significant reduction in both the FHB disease index and the level of DON accumulation. The reduced DON content in harvested grain was correlated with the amount of Tri5 mRNA determined by qRT-PCR. Synergistic effects between tetramycin and metconazole, in both the in vitro and field experiments were found. Tetramycin could provide an alternative option to control FHB.
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Affiliation(s)
- W.Q. Shi
- Institute of Plant Protection and Soil Science, Hubei Academy of Agricultural Sciences, Key Laboratory of Integrated Pest Management on Crop in Central China, Ministry of Agriculture, Hubei Key Laboratory of Crop Diseases, Insect Pests and Weeds Control, 6 Nanhu Road, Wuhan 430064, China P.R
| | - L.B. Xiang
- Institute of Plant Protection and Soil Science, Hubei Academy of Agricultural Sciences, Key Laboratory of Integrated Pest Management on Crop in Central China, Ministry of Agriculture, Hubei Key Laboratory of Crop Diseases, Insect Pests and Weeds Control, 6 Nanhu Road, Wuhan 430064, China P.R
| | - D.Z. Yu
- Institute of Plant Protection and Soil Science, Hubei Academy of Agricultural Sciences, Key Laboratory of Integrated Pest Management on Crop in Central China, Ministry of Agriculture, Hubei Key Laboratory of Crop Diseases, Insect Pests and Weeds Control, 6 Nanhu Road, Wuhan 430064, China P.R
| | - S.J. Gong
- Institute of Plant Protection and Soil Science, Hubei Academy of Agricultural Sciences, Key Laboratory of Integrated Pest Management on Crop in Central China, Ministry of Agriculture, Hubei Key Laboratory of Crop Diseases, Insect Pests and Weeds Control, 6 Nanhu Road, Wuhan 430064, China P.R
| | - L.J. Yang
- Institute of Plant Protection and Soil Science, Hubei Academy of Agricultural Sciences, Key Laboratory of Integrated Pest Management on Crop in Central China, Ministry of Agriculture, Hubei Key Laboratory of Crop Diseases, Insect Pests and Weeds Control, 6 Nanhu Road, Wuhan 430064, China P.R
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27
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The Photoreceptor Components FaWC1 and FaWC2 of Fusarium asiaticum Cooperatively Regulate Light Responses but Play Independent Roles in Virulence Expression. Microorganisms 2020; 8:microorganisms8030365. [PMID: 32150839 PMCID: PMC7143034 DOI: 10.3390/microorganisms8030365] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 03/01/2020] [Accepted: 03/03/2020] [Indexed: 01/03/2023] Open
Abstract
Fusarium asiaticum belongs to one of the phylogenetical subgroups of the F. graminearum species complex and is epidemically predominant in the East Asia area. The life cycle of F. asiaticum is significantly regulated by light. In this study, the fungal blue light receptor white collar complex (WCC), including FaWC1 and FaWC2, were characterized in F. asiaticum. The knockout mutants ΔFawc1 and ΔFawc2 were generated by replacing the target genes via homologous recombination events. The two mutants showed similar defects in light-induced carotenoid biosynthesis, UV-C resistance, sexual fruiting body development, and the expression of the light-responsive marker genes, while in contrast, all these light responses were characteristics in wild-type (WT) and their complementation strains, indicating that FaWC1 and FaWC2 are involved in the light sensing of F. asiaticum. Unexpectedly, however, the functions of Fawc1 and Fawc2 diverged in regulating virulence, as the ΔFawc1 was avirulent to the tested host plant materials, but ΔFawc2 was equivalent to WT in virulence. Moreover, functional analysis of FaWC1 by partial disruption revealed that its light–oxygen–voltage (LOV) domain was required for light sensing but dispensable for virulence, and its Zinc-finger domain was required for virulence expression but not for light signal transduction. Collectively, these results suggest that the conserved fungal blue light receptor WCC not only endows F. asiaticum with light-sensing ability to achieve adaptation to environment, but it also regulates virulence expression by the individual component FaWC1 in a light-independent manner, and the latter function opens a way for investigating the pathogenicity mechanisms of this important crop disease agent.
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28
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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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29
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Foroud NA, Baines D, Gagkaeva TY, Thakor N, Badea A, Steiner B, Bürstmayr M, Bürstmayr H. Trichothecenes in Cereal Grains - An Update. Toxins (Basel) 2019; 11:E634. [PMID: 31683661 PMCID: PMC6891312 DOI: 10.3390/toxins11110634] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 10/25/2019] [Accepted: 10/29/2019] [Indexed: 01/01/2023] Open
Abstract
Trichothecenes are sesquiterpenoid mycotoxins produced by fungi from the order Hypocreales, including members of the Fusarium genus that infect cereal grain crops. Different trichothecene-producing Fusarium species and strains have different trichothecene chemotypes belonging to the Type A and B class. These fungi cause a disease of small grain cereals, called Fusarium head blight, and their toxins contaminate host tissues. As potent inhibitors of eukaryotic protein synthesis, trichothecenes pose a health risk to human and animal consumers of infected cereal grains. In 2009, Foroud and Eudes published a review of trichothecenes in cereal grains for human consumption. As an update to this review, the work herein provides a comprehensive and multi-disciplinary review of the Fusarium trichothecenes covering topics in chemistry and biochemistry, pathogen biology, trichothecene toxicity, molecular mechanisms of resistance or detoxification, genetics of resistance and breeding strategies to reduce their contamination of wheat and barley.
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Affiliation(s)
- Nora A Foroud
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB T1J 4B1, Canada.
| | - Danica Baines
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB T1J 4B1, Canada.
| | - Tatiana Y Gagkaeva
- Laboratory of Mycology and Phytopathology, All-Russian Institute of Plant Protection (VIZR), St. Petersburg, Pushkin 196608, Russia.
| | - Nehal Thakor
- Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada.
| | - Ana Badea
- Brandon Research and Development Centre, Agriculture and Agri-Food Canada, Brandon, MB R7A 5Y3, Canada.
| | - Barbara Steiner
- Department of Agrobiotechnology (IFA-Tulln), Institute of Biotechnology in Plant Production, University of Natural Resources and Life Sciences, Vienna (BOKU), Tulln 3430, Austria.
| | - Maria Bürstmayr
- Department of Agrobiotechnology (IFA-Tulln), Institute of Biotechnology in Plant Production, University of Natural Resources and Life Sciences, Vienna (BOKU), Tulln 3430, Austria.
| | - Hermann Bürstmayr
- Department of Agrobiotechnology (IFA-Tulln), Institute of Biotechnology in Plant Production, University of Natural Resources and Life Sciences, Vienna (BOKU), Tulln 3430, Austria.
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30
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Impact of Five Succinate Dehydrogenase Inhibitors on DON Biosynthesis of Fusarium asiaticum, Causing Fusarium Head Blight in Wheat. Toxins (Basel) 2019; 11:toxins11050272. [PMID: 31096549 PMCID: PMC6563320 DOI: 10.3390/toxins11050272] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 05/02/2019] [Accepted: 05/06/2019] [Indexed: 12/28/2022] Open
Abstract
Deoxynivalenol (DON) is a class of mycotoxin produced in cereal crops infected with Fusarium graminearum species complex (FGSC). In China, FGSC mainly includes Fusarium asiaticum and F. graminearum. DON belongs to the trichothecenes and poses a serious threat to the safety and health of humans and animals. Succinate dehydrogenase inhibitors (SDHIs) are a class of fungicides that act on succinate dehydrogenase and inhibit the respiration of pathogenic fungi. In this study, the fungicidal activities of five SDHIs, including fluopyram, flutolanil, boscalid, benzovindiflupyr, and fluxapyroxad, against FGSC were determined based on mycelial growth and spore germination inhibition methods. The five SDHIs exhibited better inhibitory activities in spore germination than mycelial growth. Fluopyram exhibited a higher inhibitory effect in mycelial growth and spore germination in comparison to the other four SDHIs. In addition, the biological characteristics of F. asiaticum as affected by the five SDHIs were determined. We found that these five SDHIs decreased DON, pyruvic acid and acetyl-CoA production, isocitrate dehydrogenase mitochondrial (ICDHm) and SDH activities, and NADH and ATP content of F. asiaticum but increased the citric acid content. In addition, TRI5 gene expression was inhibited, and the formation of toxisomes was disrupted by the five SDHIs, further confirming that SDHIs can decrease DON biosynthesis of F. asiaticum. Thus, we concluded that SDHIs may decrease DON biosynthesis of F. asiaticum by inhibiting glycolysis and the tricarboxylic acid (TCA) cycle. Overall, the findings from the study will provide important references for managing Fusarium head blight (FHB) caused by FGSC and reducing DON contamination in F. asiaticum-infected wheat grains.
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Duan Y, Tao X, Zhao H, Xiao X, Li M, Wang J, Zhou M. Activity of Demethylation Inhibitor Fungicide Metconazole on Chinese Fusarium graminearum Species Complex and Its Application in Carbendazim-Resistance Management of Fusarium Head Blight in Wheat. PLANT DISEASE 2019; 103:929-937. [PMID: 30880557 DOI: 10.1094/pdis-09-18-1592-re] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Fusarium graminearum species complex (FGSC), causing Fusarium head blight (FHB) of wheat, has species-specific geographical distributions in wheat-growing regions. In recent years, benzimidazole resistance of FHB pathogens has been largely widespread in China. Although the demethylation inhibitor fungicide metconazole has been used for FHB control in some countries, no information about metconazole sensitivity of Chinese FHB pathogen populations and efficacy of metconazole in FHB control in China is available. In this study, the sensitivity of FGSC to metconazole was measured with 32 carbendazim-sensitive strains and 35 carbendazim-resistant strains based on mycelial growth. The 50% effective concentration values of 67 strains were normally distributed and ranged from 0.0209 to 0.0838 μg ml-1, with a mean of 0.0481 ± 0.0134 μg ml-1. No significant difference in metconazole sensitivity was observed between carbendazim-sensitive and -resistant populations. An interactive effect of metconazole and phenamacril, a novel cyanoacrilate fungicide approved in China against Fusarium spp., in inhibiting mycelial growth showed an additive interaction at different ratios. Furthermore, field trials to evaluate the effect of metconazole and metconazole + phenamacril treatments in FHB control, deoxynivalenol (DON) production, and grain yields were performed. Compared with the fungicides carbendazim and phenamacril currently used in China, metconazole exhibits a better efficacy for FHB control, DON production, and grain yields, and dramatically reduces use dosages of chemical compounds in the field. The mixture of metconazole and phenamacril at ratios of 2:3 and 1:2 showed the greatest efficacy for FHB control, DON production, and grain yields among all the fungicide treatments but its use dosages were higher in comparison with metconazole alone. In addition, FHB control, grain yields, and DON levels were significantly correlated with each other, showing that visual disease indices can be used as an indicator of grain yields and DON contamination. Meanwhile, the frequency of carbendazim-resistant alleles in F. graminearum populations was dramatically reduced after metconazole and phenamacril alone and the mixture of metconazole and phenamacril applications, indicating that metconazole and a mixture of metconazole and phenamacril can be used for carbendazim resistance management of FHB in wheat. Overall, the findings of this study provide important data for resistance management of FHB and reducing DON contamination in wheat grains.
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Affiliation(s)
- Yabing Duan
- 1 College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China; and
- 2 State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing, 210095, China
| | - Xian Tao
- 1 College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China; and
| | - Huahua Zhao
- 1 College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China; and
| | - Xuemei Xiao
- 1 College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China; and
| | - Meixia Li
- 1 College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China; and
| | - Jianxin Wang
- 1 College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China; and
- 2 State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing, 210095, China
| | - Mingguo Zhou
- 1 College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China; and
- 2 State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing, 210095, China
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Qiu J, Xu J, Shi J. Fusarium Toxins in Chinese Wheat since the 1980s. Toxins (Basel) 2019; 11:toxins11050248. [PMID: 31052282 PMCID: PMC6562770 DOI: 10.3390/toxins11050248] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 04/22/2019] [Accepted: 04/27/2019] [Indexed: 01/08/2023] Open
Abstract
Wheat Fusarium head blight (FHB), caused by Fusarium species, is a widespread and destructive fungal disease. In addition to the substantial yield and revenue losses, diseased grains are often contaminated with Fusarium mycotoxins, making them unsuitable for human consumption or use as animal feed. As a vital food and feed ingredient in China, the quality and safety of wheat and its products have gained growing attention from consumers, producers, scientists, and policymakers. This review supplies detailed data about the occurrence of Fusarium toxins and related intoxications from the 1980s to the present. Despite the serious situation of toxin contamination in wheat, the concentration of toxins in flour is usually lower than that in raw materials, and food-poisoning incidents have been considerably reduced. Much work has been conducted on every phase of toxin production and wheat circulation by scientific researchers. Regulations for maximum contamination limits have been established in recent years and play a substantial role in ensuring the stability of the national economy and people's livelihoods.
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Affiliation(s)
- Jianbo Qiu
- Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/ Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/ Collaborative Innovation Center for Modern Grain Circulation and Safety/ Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China.
| | - Jianhong Xu
- Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/ Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/ Collaborative Innovation Center for Modern Grain Circulation and Safety/ Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China.
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Jianrong Shi
- Key Laboratory for Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture and Rural Affairs/ Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base, Ministry of Science and Technology/ Collaborative Innovation Center for Modern Grain Circulation and Safety/ Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China.
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
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Ji L, Li Q, Wang Y, Burgess LW, Sun M, Cao K, Kong L. Monitoring of Fusarium Species and Trichothecene Genotypes Associated with Fusarium Head Blight on Wheat in Hebei Province, China. Toxins (Basel) 2019; 11:toxins11050243. [PMID: 31035348 PMCID: PMC6563079 DOI: 10.3390/toxins11050243] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 04/21/2019] [Accepted: 04/25/2019] [Indexed: 11/21/2022] Open
Abstract
To clarify the changes in field populations of Fusarium head blight (FHB) pathogens over a decade, Fusarium species and trichothecene genotypes associated with FHB on wheat were monitored in Hebei province during the periods 2005–2006 and 2013–2016. Fusarium species determination was carried out by morphological identification, species-specific amplification and partial translation elongation factor (TEF-1α) gene sequencing. Trichothecene genotype prediction was carried out by primers 3CON/3NA/3D15A/3D3 or Tri13F/Tri13R, Tri303F/Tri303R and Tri315F/Tri315R. A total of 778 purified Fusarium isolates were recovered from 42 sampling sites in 17 counties during the period 2005–2006 and 1002 Fusarium isolates were recovered from 122 sampling sites in 65 counties during the period 2013–2016. F. graminearum was the predominant pathogen recovered during the periods 2005–2006 and 2013–2016. However, the pathogen composition differed slightly between the two periods. In 2005–2006, 752 out of 778 (96.7%) of the isolates belonged to F. graminearum. Two were identified as F. culmorum. Five other Fusarium species were also recovered, F. equiseti, F. verticillioides, F. proliferatum, F. subglutinans and F. chlamydosporum, with lower recoveries of 0.4%, 0.8%, 0.8%, 0.1% and 1.0%, respectively. Trichothecene genotype prediction showed that all the 752 F. graminearum isolates were of the 15-ADON genotype. Five Fusarium species were recovered from samples collected over the period 2013–2016. F. graminearum was again the predominant pathogen with an isolation frequency of 97.6%. F. pseudograminearum, F. asiaticum, F. culmorum and F. negundis were also isolated at a recovery of 1.4%, 0.7%, 0.2% and 0.1%, respectively. For the 2013–2016 isolates, 971 of the 978 F. graminearum strains were 15-ADON whereas seven isolates were of the 3-ADON type. All seven F. asiaticum isolates were of the NIV type and fourteen F. pseudograminearum isolates were classified as 3-ADON. F. pseudograminearum was first isolated from FHB in Hebei in 2013. Although the recovery of F. pseudograminearum is still low, it represents a small shift in the pathogen composition and trichothecene genotypes associated with FHB in Hebei province. As Fusarium crown rot of wheat caused by F. pseudograminearum is an increasing problem in Hebei province, it is appropriate to monitor the role of F. pseudograminearum in FHB in the future.
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Affiliation(s)
- Lijing Ji
- Plant Protection Institute, Hebei Academy of Agricultural and Forestry Sciences, Key Laboratory of Integrated Pest Management on Crops in Northern Region of North China, Ministry of Agriculture, Baoding 071000, China.
| | - Qiusheng Li
- Plant Protection Institute, Hebei Academy of Agricultural and Forestry Sciences, Key Laboratory of Integrated Pest Management on Crops in Northern Region of North China, Ministry of Agriculture, Baoding 071000, China.
| | - Yajiao Wang
- Plant Protection Institute, Hebei Academy of Agricultural and Forestry Sciences, Key Laboratory of Integrated Pest Management on Crops in Northern Region of North China, Ministry of Agriculture, Baoding 071000, China.
| | - Lester W Burgess
- School of Biological Sciences, Faculty of Science, University of Sydney, Sydney 2006, New South Wales, Australia.
| | - Mengwei Sun
- Plant Protection Institute, Hebei Academy of Agricultural and Forestry Sciences, Key Laboratory of Integrated Pest Management on Crops in Northern Region of North China, Ministry of Agriculture, Baoding 071000, China.
| | - Keqiang Cao
- College of Plant Protection, Agricultural University of Hebei, Baoding 071001, China.
| | - Lingxiao Kong
- Plant Protection Institute, Hebei Academy of Agricultural and Forestry Sciences, Key Laboratory of Integrated Pest Management on Crops in Northern Region of North China, Ministry of Agriculture, Baoding 071000, China.
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Xu W, Han X, Li F. Co-occurrence of multi-mycotoxins in wheat grains harvested in Anhui province, China. Food Control 2019. [DOI: 10.1016/j.foodcont.2018.09.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Boutigny AL, Gautier A, Basler R, Dauthieux F, Leite S, Valade R, Aguayo J, Ioos R, Laval V. Metabarcoding targeting the EF1 alpha region to assess Fusarium diversity on cereals. PLoS One 2019; 14:e0207988. [PMID: 30633747 PMCID: PMC6329491 DOI: 10.1371/journal.pone.0207988] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 11/09/2018] [Indexed: 01/18/2023] Open
Abstract
Fusarium head blight (FHB) is a major cereal disease caused by a complex of Fusarium species. These species vary in importance depending on climatic conditions, agronomic factors or host genotype. In addition, Fusarium species can release toxic secondary metabolites. These mycotoxins constitute a significant food safety concern as they have health implications in both humans and animals. The Fusarium species involved in FHB differ in their pathogenicity, ability to produce mycotoxins, and fungicide sensitivity. Accurate and exhaustive identification of Fusarium species in planta is therefore of great importance. In this study, using a new set of primers targeting the EF1α gene, the diversity of Fusarium species on cereals was evaluated using Illumina high-throughput sequencing. The PCR amplification parameters and bioinformatic pipeline were optimized with mock and artificially infected grain communities and further tested on 65 field samples. Fusarium species were retrieved from mock communities and good reproducibility between different runs or PCR cycle numbers was be observed. The method enabled the detection of as few as one single Fusarium-infected grain in 10,000. Up to 17 different Fusarium species were detected in field samples of barley, durum and soft wheat harvested in France. This new set of primers enables the assessment of Fusarium diversity by high-throughput sequencing on cereal samples. It provides a more exhaustive picture of the Fusarium community than the currently used techniques based on isolation or species-specific PCR detection. This new experimental approach may be used to show changes in the composition of the Fusarium complex or to detect the emergence of new Fusarium species as far as the EF1α sequence of these species show a sufficient amount of polymorphism in the portion of sequence analyzed. Information on the distribution and prevalence of the different Fusarium species in a given geographical area, and in response to various environmental factors, is of great interest for managing the disease and predicting mycotoxin contamination risks.
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Affiliation(s)
- Anne-Laure Boutigny
- ANSES Laboratoire de la santé des végétaux, Unité de Mycologie, Malzéville, France
| | | | - Ryan Basler
- INRA, UMR1290 BIOGER_CPP, Thiverval-Grignon, France
| | | | | | - Romain Valade
- ARVALIS Institut du végétal, Thiverval-Grignon, France
| | - Jaime Aguayo
- ANSES Laboratoire de la santé des végétaux, Unité de Mycologie, Malzéville, France
| | - Renaud Ioos
- ANSES Laboratoire de la santé des végétaux, Unité de Mycologie, Malzéville, France
| | - Valérie Laval
- INRA, UMR1290 BIOGER_CPP, Thiverval-Grignon, France
- * E-mail:
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Garmendia G, Pattarino L, Negrín C, Martínez-Silveira A, Pereyra S, Ward TJ, Vero S. Species composition, toxigenic potential and aggressiveness of Fusarium isolates causing Head Blight of barley in Uruguay. Food Microbiol 2018; 76:426-433. [DOI: 10.1016/j.fm.2018.07.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 03/14/2018] [Accepted: 07/12/2018] [Indexed: 12/18/2022]
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Duan Y, Xiao X, Li T, Chen W, Wang J, Fraaije BA, Zhou M. Impact of epoxiconazole on Fusarium head blight control, grain yield and deoxynivalenol accumulation in wheat. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2018; 152:138-147. [PMID: 30497704 DOI: 10.1016/j.pestbp.2018.09.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 09/18/2018] [Accepted: 09/23/2018] [Indexed: 05/27/2023]
Abstract
Fusarium head blight (FHB) is a destructive disease of small grain cereals with Fusarium graminearum as one of the most important causal agents. FHB not only can reduce yield and quality of grains, but also lead to accumulation of mycotoxins in grain, thereby threatening human and animal health. In this study, we observed that epoxiconazole exhibits strong inhibitory effects on both carbendazim-resistant and phenamacril-resistant isolates using mycelial growth inhibition assays. The artificially inoculated field trials further showed that epoxiconazole increased the control efficacy of FHB by being able to control carbendazim-resistant and phenamacril-resistant isolates. Epoxiconazole triggered DON production and Tri5 expression in vitro. However, in addition to increased FHB control efficacy and grain yield, decreased DON levels were measured in field trials after epoxiconazole applications. FHB control, grain yields and DON levels were significantly correlated with each other, suggesting that the visual disease rating can be used as an indicator of grain yields and mycotoxin contamination. Meanwhile, the frequency of carbendazim-resistant alleles in F. graminearum populations was dramatically reduced after epoxiconazole applications. In addition, epoxiconazole seed treatments had no effect on seed germination but phytotoxicity was apparent through growth inhibition of wheat seedlings. Overall, these findings of this study provide useful information for wheat protection programs against toxigenic fungi responsible for FHB and the consequent mycotoxin accumulation in grains.
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Affiliation(s)
- Yabing Duan
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China; Biointeractions & Crop Protection Department, Rothamsted Research, Harpenden AL5 2JQ, UK
| | - Xuemei Xiao
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Tao Li
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Weiwei Chen
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Jianxin Wang
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China
| | - Bart A Fraaije
- Biointeractions & Crop Protection Department, Rothamsted Research, Harpenden AL5 2JQ, UK
| | - Mingguo Zhou
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China.
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Duan Y, Li M, Zhao H, Lu F, Wang J, Zhou M. Molecular and biological characteristics of laboratory metconazole-resistant mutants in Fusarium graminearum. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2018; 152:55-61. [PMID: 30497711 DOI: 10.1016/j.pestbp.2018.08.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 08/13/2018] [Accepted: 08/22/2018] [Indexed: 06/09/2023]
Abstract
The Fusarium graminearum species complex (FGSC), the causal agents of Fusarium head blight (FHB) in wheat, has the different geographically distributed species. Our previous study suggested that a DMI fungicide metconazole exhibits a strong fungicidal activity in mycelial growth of Chinese FHB pathogens and metconazole is currently a most effective compound of commercial fungicides for controlling FHB in China. In the current study, metconazole-resistant F. graminearum mutants were induced by chemical taming and their molecular and biological characteristics were determined. Compared to the corresponding parental strains, three mutation genotypes (two single mutations G443S and D243N, and a combined mutation E103Q&V157 L) were observed in the FgCYP51A of metconazole-resistant mutants. In addition to FgCYP51A mutation, all the mutants had no change on sequences of FgCYP51B and FgCYP51C and promotor sequences of FgCYP51s, but expression patterns of FgCYP51s were different. Compared to the corresponding parental strains, overexpression of FgCYP51A, FgCYP51B and FgCYP51C was observed in the mutant conferring D243N mutation, overexpression of FgCYP51A and FgCYP51B was observed in the mutant conferring E103Q&V157L mutations, and overexpression of FgCYP51A was observed in the mutant conferring G443S mutation. Biological fitness of the mutants conferring D243N mutation or E103Q&V157 L mutations significantly decreased in comparison to the corresponding parental strains, suggesting a fitness penalty. The mutants conferring G443S mutation had no change in biological fitness as compared with the parental strain, indicating that the G443S mutation may emerge in field resistant populations of F. graminearum in the future. In addition, a positive cross resistance between metconazole and other tested DMI fungicides was observed in the mutants conferring D243N mutation or E103Q&V157L mutations, but no cross resistance between metconazole and ipconazole or prochloraz was observed in the mutants conferring G443S mutation. Therefore, we concluded that the mutation genotype of FgCYP51A may cause the differences of biological fitness, cross-resistance and FgCYP51s overexpression patterns. Such information will increase our understanding of resistance mechanism of F. graminearum to DMIs and could provide new reference data for the management of FHB.
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Affiliation(s)
- Yabing Duan
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, China
| | - Meixia Li
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Huahua Zhao
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Fei Lu
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Jianxin Wang
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, China
| | - Mingguo Zhou
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, China.
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Wu D, Wan J, Lu J, Wang X, Zhong S, Schwarz P, Chen B, Rao J. Chitosan coatings on lecithin stabilized emulsions inhibit mycotoxin production by Fusarium pathogens. Food Control 2018. [DOI: 10.1016/j.foodcont.2018.05.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Adeniji AA, Babalola OO. Tackling maize fusariosis: in search of Fusarium graminearum biosuppressors. Arch Microbiol 2018; 200:1239-1255. [PMID: 29934785 DOI: 10.1007/s00203-018-1542-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 05/17/2018] [Accepted: 06/16/2018] [Indexed: 12/16/2022]
Abstract
This review presents biocontrol agents employed to alleviate the deleterious effect of the pathogen Fusarium graminearum on maize. The control of this mycotoxigenic phytopathogen remains elusive despite the elaborate research conducted on its detection, identification, and molecular fingerprinting. This could be attributed to the fact that in vitro and greenhouse biocontrol studies on F. graminearum have exceeded the number of field studies done. Furthermore, along with the variances seen among these F. graminearum suppressing biocontrol strains, it is also clear that the majority of research done to tackle F. graminearum outbreaks was on wheat and barley cultivars. Most fusariosis management related to maize targeted other members of Fusarium such as Fusarium verticillioides, with biocontrol strains from the genera Bacillus and Pseudomonas being used frequently in the experiments. We highlight relevant current techniques needed to identify an effective biofungicide for maize fusariosis and recommend alternative approaches to reduce the scarcity of data for indigenous maize field trials.
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Affiliation(s)
- Adetomiwa Ayodele Adeniji
- Food Security and Safety Niche Area, Faculty of Agriculture, Science and Technology, North-West University, Private Bag X2046, Mmabatho, 2735, South Africa
| | - Olubukola Oluranti Babalola
- Food Security and Safety Niche Area, Faculty of Agriculture, Science and Technology, North-West University, Private Bag X2046, Mmabatho, 2735, South Africa.
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Regional differences in the composition of Fusarium Head Blight pathogens and mycotoxins associated with wheat in Mexico. Int J Food Microbiol 2018; 273:11-19. [DOI: 10.1016/j.ijfoodmicro.2018.03.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 03/07/2018] [Accepted: 03/10/2018] [Indexed: 12/28/2022]
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Host and Cropping System Shape the Fusarium Population: 3ADON-Producers Are Ubiquitous in Wheat Whereas NIV-Producers Are More Prevalent in Rice. Toxins (Basel) 2018. [PMID: 29518004 PMCID: PMC5869403 DOI: 10.3390/toxins10030115] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In recent years, Fusarium head blight (FHB) outbreaks have occurred much more frequently in China. The reduction of burning of the preceding crop residues is suggested to contribute to more severe epidemics as it may increase the initial inoculum. In this study, a large number of Fusarium isolates was collected from blighted wheat spikes as well as from rice stubble with perithecia originating from nine sampling sites in five provinces in Southern China. Fusarium asiaticum dominated both wheat and rice populations, although rice populations showed a higher species diversity. Chemotype analysis showed that rice is the preferred niche for NIV mycotoxin producers that were shown to be less virulent on wheat. In contrast, 3ADON producers are more prevalent on wheat and in wheat producing areas. The 3ADON producers were shown to be more virulent on wheat, revealing the selection pressure of wheat on 3ADON producers. For the first time, members of the Incarnatum-clade of FusariumIncarnatum-Equiseti Species Complex (FIESC) were found to reproduce sexually on rice stubble. The pathogenicity of FIESC isolates on wheat proved very low and this may cause the apparent absence of this species in the main wheat producing provinces. This is the first report of the Fusarium population structure including rice stubble as well as a direct comparison with the population on wheat heads in the same fields. Our results confirm that the perithecia on rice stubble are the primary inoculum of FHB on wheat and that cropping systems affect the local Fusarium population.
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Yang Y, Li MX, Duan YB, Li T, Shi YY, Zhao DL, Zhou ZH, Xin WJ, Wu J, Pan XY, Li YJ, Zhu YY, Zhou MG. A new point mutation in β 2-tubulin confers resistance to carbendazim in Fusarium asiaticum. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2018; 145:15-21. [PMID: 29482727 DOI: 10.1016/j.pestbp.2017.12.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 12/11/2017] [Accepted: 12/20/2017] [Indexed: 06/08/2023]
Abstract
Resistance to benzimidazole fungicides in many phytopathogenic fungi is caused by specific point mutations in the β-tubulin gene (β-tubulin). However, the mutated locus and genotype of β-tubulin differ among phytopathogenic fungi. To validate the point mutation in Fusarium asiaticum β2-tubulin that confers resistance to carbendazim and to analyze the molecular interaction between carbendazim and F. asiaticum β2-tubulin. In this study, a new point mutation (GAG→GCG, E198A) at codon 198 of β2-tubulin in a wild-type F. asiaticum strain was constructed by site-directed mutagenesis followed by a split marker strategy. The site-directed mutants were verified and exhibited a high level of resistance to carbendazim. In the absence of fungicide treatment, the biological characteristics did not differ between the site-directed mutants and the wild-type strain. Molecular docking between carbendazim and β2-tubulin was carried out using the Surflex-Dock program in Sybyl X-2.0 version and the results indicated that the E198A mutation altered the configuration of β2-tubulin, resulting in the change of the bonding sites and docking scores. We concluded that the point mutation of F. asiaticum β2-tubulin conferring carbendazim resistance may not always be the bonding site for carbendazim.
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Affiliation(s)
- Ying Yang
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, 210095, China
| | - Mei-Xia Li
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ya-Bing Duan
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Tao Li
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yi-Yuan Shi
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, 210095, China
| | - Dong-Lei Zhao
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ze-Hua Zhou
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, 210095, China
| | - Wen-Jing Xin
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jian Wu
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xia-Yan Pan
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yan-Jun Li
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yuan-Ye Zhu
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ming-Guo Zhou
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing, 210095, China.
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Wang CL, Cheng YH. Identification and trichothecene genotypes of Fusarium graminearum species complex from wheat in Taiwan. BOTANICAL STUDIES 2017; 58:4. [PMID: 28510187 PMCID: PMC5430562 DOI: 10.1186/s40529-016-0156-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 12/12/2016] [Indexed: 06/07/2023]
Abstract
BACKGROUND Fusarium head blight (FHB) of wheat caused by Fusarium graminearum species complex (FGSC) is a devastating disease worldwide. The pathogens not only reduce the yield of wheat, but also impact the quality of wheat by contamination with trichothecene mycotoxins. A systematic investigation on the pathogens of FHB in Taiwan is lacking. Here, molecular and morphological approaches were used to identify species of the Taiwanese FGSC isolates and determine their trichothecene genotypes. RESULTS In this study, a total of 195 isolates of FGSC from diseased wheat were collected from 8 areas of northern and central Taiwan. All isolates were subjected to seedling inoculation for verification of pathogenicity. The pathogenic isolates were genetically characterized by sequence characterized amplified region (SCAR), PCR- restriction fragment length polymorphism (RFLP), phylogenetic analysis and fixed nucleotides to clarify their phylogenetic species, and by PCR assays of TRI genes to determine trichothecene genotypes. They were identified as F. asiaticum, F. graminearum sensu stricto, F. meridionale and an unknown species. Isolates of F. asiaticum were the major causal agents (98%) in this investigated population and were comprised of SCAR type 5 (75%), SCAR type 4 (21%) and SCAR type 3 (2%). Their trichothecene genotypes were either 15-acetyl-deoxynivalenol (15-ADON) (83%) or nivalenol (NIV) genotype (17%). These genetic characterizations indicated that F. asiaticum (15-ADON SCAR type 5) accounts for 60% of this Taiwanese population. Virulence assay on wheat heads indicated virulence of F. asiaticum isolates in subpopulations divided by SCAR types or trichothecene genotypes were comparable, suggesting other factors influence the unequal subpopulation sizes. CONCLUSIONS This is the first study that FGSC isolates in Taiwan were systematically collected and characterized. In addition to F. graminearum sensu stricto and F. meridionale, F. asiaticum with 15-ADON genotype was identified as the predominate species in Taiwan. In contrast to Chinese and Japanese populations that F. asiaticum isolates were typically of 3-ADON or NIV genotype, the predominate 15-ADON genotype in Taiwanese population was unique among F. asiaticum populations and represented the southernmost 15-ADON genotype population in East Asia.
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Affiliation(s)
- Chih-Li Wang
- Department of Plant Pathology, National Chung Hsing University, Taichung, 40227 Taiwan
| | - Yi-Hong Cheng
- Department of Plant Pathology, National Chung Hsing University, Taichung, 40227 Taiwan
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Walder F, Schlaeppi K, Wittwer R, Held AY, Vogelgsang S, van der Heijden MGA. Community Profiling of Fusarium in Combination with Other Plant-Associated Fungi in Different Crop Species Using SMRT Sequencing. FRONTIERS IN PLANT SCIENCE 2017; 8:2019. [PMID: 29234337 PMCID: PMC5712420 DOI: 10.3389/fpls.2017.02019] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Accepted: 11/13/2017] [Indexed: 06/07/2023]
Abstract
Fusarium head blight, caused by fungi from the genus Fusarium, is one of the most harmful cereal diseases, resulting not only in severe yield losses but also in mycotoxin contaminated and health-threatening grains. Fusarium head blight is caused by a diverse set of species that have different host ranges, mycotoxin profiles and responses to agricultural practices. Thus, understanding the composition of Fusarium communities in the field is crucial for estimating their impact and also for the development of effective control measures. Up to now, most molecular tools that monitor Fusarium communities on plants are limited to certain species and do not distinguish other plant associated fungi. To close these gaps, we developed a sequencing-based community profiling methodology for crop-associated fungi with a focus on the genus Fusarium. By analyzing a 1600 bp long amplicon spanning the highly variable segments ITS and D1-D3 of the ribosomal operon by PacBio SMRT sequencing, we were able to robustly quantify Fusarium down to species level through clustering against reference sequences. The newly developed methodology was successfully validated in mock communities and provided similar results as the culture-based assessment of Fusarium communities by seed health tests in grain samples from different crop species. Finally, we exemplified the newly developed methodology in a field experiment with a wheat-maize crop sequence under different cover crop and tillage regimes. We analyzed wheat straw residues, cover crop shoots and maize grains and we could reveal that the cover crop hairy vetch (Vicia villosa) acts as a potent alternative host for Fusarium (OTU F.ave/tri) showing an eightfold higher relative abundance compared with other cover crop treatments. Moreover, as the newly developed methodology also allows to trace other crop-associated fungi, we found that vetch and green fallow hosted further fungal plant pathogens including Zymoseptoria tritici. Thus, besides their beneficial traits, cover crops can also entail phytopathological risks by acting as alternative hosts for Fusarium and other noxious plant pathogens. The newly developed sequencing based methodology is a powerful diagnostic tool to trace Fusarium in combination with other fungi associated to different crop species.
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Affiliation(s)
- Florian Walder
- Plant-Soil Interactions, Research Division Agroecology and Environment, Agroscope, Zurich, Switzerland
| | - Klaus Schlaeppi
- Plant-Soil Interactions, Research Division Agroecology and Environment, Agroscope, Zurich, Switzerland
| | - Raphaël Wittwer
- Plant-Soil Interactions, Research Division Agroecology and Environment, Agroscope, Zurich, Switzerland
| | - Alain Y. Held
- Plant-Soil Interactions, Research Division Agroecology and Environment, Agroscope, Zurich, Switzerland
| | - Susanne Vogelgsang
- Ecology of Noxious and Beneficial Organisms, Research Division Plant Protection, Agroscope, Zurich, Switzerland
| | - Marcel G. A. van der Heijden
- Plant-Soil Interactions, Research Division Agroecology and Environment, Agroscope, Zurich, Switzerland
- Department of Evolutionary Biology and Environmental Studies, University of Zürich, Zurich, Switzerland
- Plant-Microbe Interactions, Institute of Environmental Biology, Faculty of Science, Utrecht University, Utrecht, Netherlands
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Funnell-Harris DL, Scully ED, Sattler SE, French RC, O'Neill PM, Pedersen JF. Differences in Fusarium Species in brown midrib Sorghum and in Air Populations in Production Fields. PHYTOPATHOLOGY 2017; 107:1353-1363. [PMID: 28686087 DOI: 10.1094/phyto-08-16-0316-r] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Several Fusarium spp. cause sorghum (Sorghum bicolor) grain mold, resulting in deterioration and mycotoxin production in the field and during storage. Fungal isolates from the air (2005 to 2006) and from leaves and grain from wild-type and brown midrib (bmr)-6 and bmr12 plants (2002 to 2003) were collected from two locations. Compared with the wild type, bmr plants have reduced lignin content, altered cell wall composition, and different levels of phenolic intermediates. Multilocus maximum-likelihood analysis identified two Fusarium thapsinum operational taxonomic units (OTU). One was identified at greater frequency in grain and leaves of bmr and wild-type plants but was infrequently detected in air. Nine F. graminearum OTU were identified: one was detected at low levels in grain and leaves while the rest were only detected in air. Wright's F statistic (FST) indicated that Fusarium air populations differentiated between locations during crop anthesis but did not differ during vegetative growth, grain development, and maturity. FST also indicated that Fusarium populations from wild-type grain were differentiated from those in bmr6 or bmr12 grain at one location but, at the second location, populations from wild-type and bmr6 grain were more similar. Thus, impairing monolignol biosynthesis substantially effected Fusarium populations but environment had a strong influence.
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Affiliation(s)
- Deanna L Funnell-Harris
- First, fourth, and fifth authors: Wheat, Sorghum and Forage Research Unit (WSFRU), United States Department of Agriculture-Agricultural Research Service (USDA-ARS), 251 Filley Hall, Department of Plant Pathology, University of Nebraska (UNL), Lincoln 68583-0937; second author: Stored Product Insect and Engineering Research Unit, USDA-ARS Center for Grain and Animal Health Research, Department of Entomology, Kansas State University, 1515 College Avenue, Manhattan 66502; and third and sixth authors: WSFRU, USDA-ARS, Departments of Agronomy and Horticulture, UNL
| | - Erin D Scully
- First, fourth, and fifth authors: Wheat, Sorghum and Forage Research Unit (WSFRU), United States Department of Agriculture-Agricultural Research Service (USDA-ARS), 251 Filley Hall, Department of Plant Pathology, University of Nebraska (UNL), Lincoln 68583-0937; second author: Stored Product Insect and Engineering Research Unit, USDA-ARS Center for Grain and Animal Health Research, Department of Entomology, Kansas State University, 1515 College Avenue, Manhattan 66502; and third and sixth authors: WSFRU, USDA-ARS, Departments of Agronomy and Horticulture, UNL
| | - Scott E Sattler
- First, fourth, and fifth authors: Wheat, Sorghum and Forage Research Unit (WSFRU), United States Department of Agriculture-Agricultural Research Service (USDA-ARS), 251 Filley Hall, Department of Plant Pathology, University of Nebraska (UNL), Lincoln 68583-0937; second author: Stored Product Insect and Engineering Research Unit, USDA-ARS Center for Grain and Animal Health Research, Department of Entomology, Kansas State University, 1515 College Avenue, Manhattan 66502; and third and sixth authors: WSFRU, USDA-ARS, Departments of Agronomy and Horticulture, UNL
| | - Roy C French
- First, fourth, and fifth authors: Wheat, Sorghum and Forage Research Unit (WSFRU), United States Department of Agriculture-Agricultural Research Service (USDA-ARS), 251 Filley Hall, Department of Plant Pathology, University of Nebraska (UNL), Lincoln 68583-0937; second author: Stored Product Insect and Engineering Research Unit, USDA-ARS Center for Grain and Animal Health Research, Department of Entomology, Kansas State University, 1515 College Avenue, Manhattan 66502; and third and sixth authors: WSFRU, USDA-ARS, Departments of Agronomy and Horticulture, UNL
| | - Patrick M O'Neill
- First, fourth, and fifth authors: Wheat, Sorghum and Forage Research Unit (WSFRU), United States Department of Agriculture-Agricultural Research Service (USDA-ARS), 251 Filley Hall, Department of Plant Pathology, University of Nebraska (UNL), Lincoln 68583-0937; second author: Stored Product Insect and Engineering Research Unit, USDA-ARS Center for Grain and Animal Health Research, Department of Entomology, Kansas State University, 1515 College Avenue, Manhattan 66502; and third and sixth authors: WSFRU, USDA-ARS, Departments of Agronomy and Horticulture, UNL
| | - Jeffrey F Pedersen
- First, fourth, and fifth authors: Wheat, Sorghum and Forage Research Unit (WSFRU), United States Department of Agriculture-Agricultural Research Service (USDA-ARS), 251 Filley Hall, Department of Plant Pathology, University of Nebraska (UNL), Lincoln 68583-0937; second author: Stored Product Insect and Engineering Research Unit, USDA-ARS Center for Grain and Animal Health Research, Department of Entomology, Kansas State University, 1515 College Avenue, Manhattan 66502; and third and sixth authors: WSFRU, USDA-ARS, Departments of Agronomy and Horticulture, UNL
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Kidane YG, Hailemariam BN, Mengistu DK, Fadda C, Pè ME, Dell'Acqua M. Genome-Wide Association Study of Septoria tritici Blotch Resistance in Ethiopian Durum Wheat Landraces. FRONTIERS IN PLANT SCIENCE 2017; 8:1586. [PMID: 28959268 PMCID: PMC5603693 DOI: 10.3389/fpls.2017.01586] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 08/29/2017] [Indexed: 05/21/2023]
Abstract
Septoria tritici blotch (STB) is a devastating fungal disease affecting durum and bread wheat cultivation worldwide. The identification, development, and employment of resistant wheat genetic material is the key to overcoming costs and limitations of fungicide treatments. The search for resistance sources in untapped genetic material may speed up the deployment of STB genetic resistance in the field. Ethiopian durum wheat landraces represent a valuable source of such diversity. In this study, 318 Ethiopian durum wheat genotypes, for the most part traditional landraces, were phenotyped for resistance to different aspects of STB infection. Phenology, yield and yield component traits were concurrently measured the collection. Here we describe the distribution of STB resistance traits in modern varieties and in landraces, and the relation existing between STB resistance and other agronomic traits. STB resistance sources were found in landraces as well as in modern varieties tested, suggesting the presence of alleles of breeding relevance. The genetic material was genotyped with more than 16 thousand genome-wide polymorphic markers to describe the linkage disequilibrium and genetic structure existing within the panel of genotypes, and a genome-wide association (GWA) study was run to allow the identification of genomic loci involved in STB resistance. High diversity and low genetic structure in the panel allowed high efficiency GWA. The GWA scan detected five major putative QTL for STB resistance, only partially overlapping those already reported in the wheat literature. We report four putative loci for Septoria resistance with no match in previous literature: two highly significant ones on Chr 3A and 5A, and two suggestive ones on Chr 4B and 5B. Markers underlying these QTL explained as much as 10% of the phenotypic variance for disease resistance. We found three cases in which putative QTL for agronomic traits overlapped marker trait association deriving from STB GWA. Our results show that the Ethiopian untapped allelic diversity bears a great value in studying the molecular basis of STB resistance and in breeding for resistance in local and international material.
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Affiliation(s)
- Yosef G. Kidane
- Institute of Life Sciences, Scuola Superiore Sant'AnnaPisa, Italy
- Sirinka Agricultural Research CenterWoldia, Ethiopia
- Bioversity InternationalAddis Ababa, Ethiopia
| | | | - Dejene K. Mengistu
- Institute of Life Sciences, Scuola Superiore Sant'AnnaPisa, Italy
- Department of Dryland Crop and Horticultural Sciences, Mekelle UniversityMekelle, Ethiopia
| | - Carlo Fadda
- Bioversity InternationalAddis Ababa, Ethiopia
| | - Mario Enrico Pè
- Institute of Life Sciences, Scuola Superiore Sant'AnnaPisa, Italy
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Garmendia G, Umpierrez-Failache M, Ward TJ, Vero S. Development of a PCR-RFLP method based on the transcription elongation factor 1-α gene to differentiate Fusarium graminearum from other species within the Fusarium graminearum species complex. Food Microbiol 2017; 70:28-32. [PMID: 29173636 DOI: 10.1016/j.fm.2017.08.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 07/03/2017] [Accepted: 08/27/2017] [Indexed: 12/01/2022]
Abstract
Fusarium head blight (FHB) is a destructive disease of cereals crops worldwide and a major food safety concern due to grain contamination with trichothecenes and other mycotoxins. Fusarium graminearum, a member of the Fusarium graminearum species complex (FGSC) is the dominant FHB pathogen in many parts of the world. However, a number of other Fusarium species, including other members of the FGSC, may also be present for example in Argentina, New Zealand, Ethiopia, Nepal, Unites States in cereals such as wheat and barley. Proper species identification is critical to research aimed at improving disease and mycotoxin control programs. Identification of Fusarium species is are often unreliable by traditional, as many species are morphologically cryptic. DNA sequence-based methods offer a reliable means of species identification, but can be expensive when applied to the analyses of population samples. To facilitate identification of the major causative agent of FHB, this work describes an easy and inexpensive method to differentiate F. graminearum from the remaining species within the FGSC and from the other common Fusarium species causing FHB in cereals. The developed method is based on a PCR-RFLP of the transcription elongation factor (TEF 1-α) gene using the restriction enzyme BsaHI.
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Affiliation(s)
- Gabriela Garmendia
- Cátedra de Microbiología, Departamento de Biociencias, Facultad de Química, UDELAR, 11800, Montevideo, Uruguay.
| | | | - Todd J Ward
- U.S. Department of Agriculture, Agricultural Research Service, 1815 N, University St., Peoria, IL 61604, USA
| | - Silvana Vero
- Cátedra de Microbiología, Departamento de Biociencias, Facultad de Química, UDELAR, 11800, Montevideo, Uruguay
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Vanheule A, De Boevre M, Moretti A, Scauflaire J, Munaut F, De Saeger S, Bekaert B, Haesaert G, Waalwijk C, van der Lee T, Audenaert K. Genetic Divergence and Chemotype Diversity in the Fusarium Head Blight Pathogen Fusarium poae. Toxins (Basel) 2017; 9:toxins9090255. [PMID: 28832503 PMCID: PMC5618188 DOI: 10.3390/toxins9090255] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 08/19/2017] [Indexed: 01/02/2023] Open
Abstract
Fusarium head blight is a disease caused by a complex of Fusarium species. F. poae is omnipresent throughout Europe in spite of its low virulence. In this study, we assessed a geographically diverse collection of F. poae isolates for its genetic diversity using AFLP (Amplified Fragment Length Polymorphism). Furthermore, studying the mating type locus and chromosomal insertions, we identified hallmarks of both sexual recombination and clonal spread of successful genotypes in the population. Despite the large genetic variation found, all F. poae isolates possess the nivalenol chemotype based on Tri7 sequence analysis. Nevertheless, Tri gene clusters showed two layers of genetic variability. Firstly, the Tri1 locus was highly variable with mostly synonymous mutations and mutations in introns pointing to a strong purifying selection pressure. Secondly, in a subset of isolates, the main trichothecene gene cluster was invaded by a transposable element between Tri5 and Tri6. To investigate the impact of these variations on the phenotypic chemotype, mycotoxin production was assessed on artificial medium. Complex blends of type A and type B trichothecenes were produced but neither genetic variability in the Tri genes nor variability in the genome or geography accounted for the divergence in trichothecene production. In view of its complex chemotype, it will be of utmost interest to uncover the role of trichothecenes in virulence, spread and survival of F. poae.
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Affiliation(s)
- Adriaan Vanheule
- Department of Applied Biosciences, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium.
- Laboratory of Applied Mycology and Phenomics, Department of Applied Biosciences, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium.
| | - Marthe De Boevre
- Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, 9000 Ghent, Belgium.
| | - Antonio Moretti
- Institute of Sciences of Food Production, National Research Council, 70126 Bari, Italy.
| | - Jonathan Scauflaire
- Applied Microbiology, Earth and Life Institute, Université Catholique de Louvain, 1348 Louvain-la-Neuve, Belgium.
| | - Françoise Munaut
- Applied Microbiology, Earth and Life Institute, Université Catholique de Louvain, 1348 Louvain-la-Neuve, Belgium.
| | - Sarah De Saeger
- Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, 9000 Ghent, Belgium.
| | - Boris Bekaert
- Department of Applied Biosciences, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium.
- Laboratory of Applied Mycology and Phenomics, Department of Applied Biosciences, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium.
| | - Geert Haesaert
- Department of Applied Biosciences, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium.
| | - Cees Waalwijk
- Wageningen University and Research Centre, 6708PB Wageningen, The Netherlands.
| | - Theo van der Lee
- Wageningen University and Research Centre, 6708PB Wageningen, The Netherlands.
| | - Kris Audenaert
- Laboratory of Applied Mycology and Phenomics, Department of Applied Biosciences, Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium.
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50
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Abedi-Tizaki M, Zafari D. Geographic distribution of phylogenetic species of the Fusarium graminearum species complex and their 8-ketotrichothecene chemotypes on wheat spikes in Iran. Mycotoxin Res 2017; 33:245-259. [PMID: 28612272 DOI: 10.1007/s12550-017-0283-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2017] [Revised: 05/27/2017] [Accepted: 05/30/2017] [Indexed: 10/19/2022]
Abstract
Isolates of the Fusarium graminearum species complex (FGSC, n = 446) were collected from wheat spikes from northern and western regions of Iran with a history of Fusarium head blight (FHB) occurrences. The trichothecene mycotoxin genotypes/chemotypes, the associated phylogenetic species, and geographical distribution of these isolates were analyzed. Two phylogenetic species, Fusarium asiaticum and F. graminearum, were identified and were found to belong to sequence characterized amplified region (SCAR) groups V and I. Isolates from F. asiaticum species lineage 6 were within SCAR group V, whereas F. graminearum species lineage 7 were of SCAR group I. Of the 446 isolates assayed, 274 were F. asiaticum species predominantly of the nivalenol (NIV) genotype, while other isolates were either deoxynivalenol (DON) plus 3-acetyldeoxynivalenol (3-AcDON) or DON plus 15-acetyldeoxynivalenol (15-AcDON) genotype. Based on Tri7 gene sequences, a new subpopulation of 15-AcDON producers was observed among F. asiaticum strains in which 11-bp repeats were absent in the Tri7 sequences. The trichothecene chemotype was confirmed and quantified by high-performance liquid chromatography (HPLC) in 46 FGSC isolates. Isolates produced NIV (33.4-108.2 μg/g) and DON (64.7-473.6 μg/g) plus either 3-AcDON (51.4-142.4 μg/g) or 15-AcDON (24.1-99.3 μg/g). Among FGSC isolates, F. asiaticum produced the highest levels of trichothecenes. Using BIOCLIM based on the climate data of 20-year during 1994-2014, modelling geographical distribution of FGSC showed that F. asiaticum was restricted to warmer and humid areas with a median value of mean annual temperature of about 17.5 °C and annual rainfall of 658 mm, respectively (P < 0.05). In contrast, F. graminearum (only 15-AcDON producers) was restricted to cooler and drier areas, with a median value of the mean annual temperature of 14.4 °C and an annual rainfall of 384 mm, respectively (P < 0.05). Based on climate parameters at anthesis, the recorded distribution of F. graminearum and F. asiaticum was similar to that based on BIOCLIM parameters. Therefore, geographic differences on the wheat-growing areas in Iran have had a significant effect on distribution of FGSC and their trichothecene chemotypes.
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Affiliation(s)
- Mostafa Abedi-Tizaki
- Department of Plant Protection, College of Agriculture, Buali Sina University, Hamedan, Iran
| | - Doustmorad Zafari
- Department of Plant Protection, College of Agriculture, Buali Sina University, Hamedan, Iran.
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