A5045843054- Mycotoxins in Agriculture and Food
- Plant Pathogens and Fungal Diseases
- Plant Disease Resistance and Genetics
- Plant-Microbe Interactions and Immunity
- Fungal and yeast genetics research
- Plant and fungal interactions
- Wheat and Barley Genetics and Pathology
- Plant Pathogens and Resistance
- Mycorrhizal Fungi and Plant Interactions
- Fungal Biology and Applications
- Microbial Natural Products and Biosynthesis
- Yeasts and Rust Fungi Studies
- Potato Plant Research
- Legume Nitrogen Fixing Symbiosis
- Antifungal resistance and susceptibility
- Plant Pathogenic Bacteria Studies
- Infection Control and Ventilation
- Glycosylation and Glycoproteins Research
- Plant biochemistry and biosynthesis
- Crop Yield and Soil Fertility
- Indoor Air Quality and Microbial Exposure
- Fungal Plant Pathogen Control
- COVID-19 and healthcare impacts
- Fermentation and Sensory Analysis
- Plant nutrient uptake and metabolism
Université Laval
2012-2023
Centre hospitalier universitaire de Québec
2023
Hôpital Necker-Enfants Malades
2012-2014
Hôtel-Dieu de Québec
2012-2013
National Center for Agricultural Utilization Research
2002-2012
Nepal Agricultural Research Council
2000-2008
Michigan State University
2004-2008
Agricultural Research Service
1995-2007
United States Department of Agriculture
1999-2007
Peoria campus of the University of Illinois System
2007
Beneficial microbes in the microbiome of plant roots improve health. Induced systemic resistance (ISR) emerged as an important mechanism by which selected growth–promoting bacteria and fungi rhizosphere prime whole body for ...Read More
We have analyzed the role of trichothecene toxins in virulence fungus Gibberella zeae (anamorph, Fusarium graminearum) on wheat (Triticum aestivum). Trichothecene-nonproducing mutants G. were obtained by disrupting Tri5, gene encoding trichodiene synthase, which catalyzes first committed step biosynthetic pathway. appear to be normal growth and development under laboratory conditions. One such mutant was selfed generate a meiotic revertant that lost disruption vector recovered production. In...
Strains of Fusarium proliferatum, F. subglutinans, anthophilum, annulatum, succisae, beomiforme, dlamini, napiforme, and nygamai from a variety substrates geographic areas were tested for the production fumonisin B1 in culture. None cultures subglutinans (0 23), annulatum 1), succisae 2), or beomiforme 15) produced proliferatum (19 31; 61%) amounts ranging 155 to 2,936 ppm, strains anthophilum (3 17; 18%) 58 613 dlamini (5 9; 56%) 42 82 napiforme 33; 15%) 16 479 (10 27; 37%) 17 7,162 ppm. Of...
ABSTRACT Infection of cereal grains with Fusarium species can cause contamination mycotoxins that affect human and animal health. To determine the potential for mycotoxin contamination, we isolated from samples rice seeds were collected in 1997 on farms foothills Nepal Himalaya. The predominant surface-disinfested husks Gibberella fujikuroi complex, including G. mating population A (anamorph, verticillioides ), C D proliferatum ). widespread occurrence suggests its role complex symptoms...
Abstract Fusarium head blight (FHB), caused by graminearum Schwabe (telomorph = Gibberella zeae (Schw.)), is an important wheat disease world‐wide. Production of deoxynivalenol (DON) F. in infected grain detrimental to livestock and also a safety concern human foods. An international collection 116 lines was evaluated for FHB resistance concentration DON grain. Plants were inoculated with mixed isolates the greenhouse injecting conidia into single spikelet each spike field scattering...
In Fusarium sporotrichioides, several genes required for biosynthesis of the trichothecene mycotoxin T-2 toxin are closely linked. Further characterization this gene cluster has revealed a gene, Tri6, that specifies 217-amino-acid protein with regions similar to Cys2His2 zinc finger proteins. Temporal expression Tri6 is biosynthetic pathway genes. Analysis transcripts indicated transcription initiated in two and within each region there may be at least four initiation sites. Disruption...
Trichothecene-producing and -nonproducing Fusarium graminearum strains were tested for their ability to cause Gibberella ear rot in field trials at two locations-Ottawa, Ontario, Peoria, Illinois-in 1996. Maize ears inoculated with wild-type or transgenic F. which the trichothecene biosynthetic pathway had been disabled by specific disruption of trichodiene synthase gene a derivative revertant strain production restored through recombination. A silk channel inoculation method was employed...
Strains of Fusarium moniliforme from different geographic areas and corn other substrates were tested for the ability to produce fumonisins in culture. The test results indicate that potential exists production by such strains agricultural commodities widespread areas.
Summary Trichothecenes are terpene‐derived secondary metabolites produced by multiple genera of filamentous fungi, including many plant pathogenic species Fusarium . These interest because they toxic to animals and plants can contribute pathogenesis on some crop species. graminearum F. sporotrichioides have trichothecene biosynthetic genes ( TRI ) at three loci: a 12‐gene cluster two smaller loci that consist one or genes. Here, comparisons additional provided evidence complex evolutionary...
Maize (Zea mays) and wheat (Triticum aestivum) collected in the foothills of Nepal Himalaya Mountains were analyzed for Fusarium species mycotoxins: fumonisins, nivalenol (NIV), deoxynivalenol (DON). Predominant Gibberella fujikuroi mating population A (F. moniliforme) maize F. graminearum wheat; G. D proliferatum), acuminatum, avenaceum, chlamydosporum, equiseti, oxysporum, semitectum, torulosum also present. Strains produced strains NIV or DON. By immunoassay high-performance liquid...
Gibberella fujikuroi strains isolated from rice in the United States, Asia, and other geographic areas were tested for sexual fertility with members of mating population D production fumonisin B(inf1) moniliformin culture. Of 59 field tested, 32 (54%) able to cross tester D, but only a few ascospores produced most these crosses. Thirty-four more than 10 (mu)g per g, three 1000 (mu)g/g. Twenty-five 100 15 1,000 Seven both moniliformin, none high level (>1,000 (mu)g/g). However, genetic...