Adriana Mabel Torres

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Gibberella zeae (anamorph Fusarium graminearum) causes Fusarium head blight of wheat. The authors used amplified fragment length polymorphisms (AFLPs) to characterize the genetic structure of two G. zeae populations from commercial wheat fields. The working hypothesis was that sufficient genetic exchange occurs between local populations to prevent(More)
Argentina is the fourth largest exporter of wheat in the world. The main pathogen associated with Fusarium Head Blight (FHB) of wheat in Argentina is Fusarium graminearum lineage 7 also termed F. graminearum sensu stricto in the F. graminearum species complex, which can produce the Type B trichothecenes, usually deoxynivalenol (DON) and its acetylated forms(More)
The production of fumonisins, fusaproliferin and beauvericin by Gibberella fujikuroi different mating populations isolated from maize in Argentina was evaluated. From 203 strains of Fusarium verticillioides (G. fujikuroi mating population A), 193 were fumonisin producers. Among members of mating population A, female fertile strains produced 20% more toxin(More)
Vineyards located in eight grape growing regions of Argentina during the harvest season 2006/07 were evaluated. The aims of this study were to determine the incidence of Aspergillus section Nigri, their ability to produce ochratoxin A (OTA) and to evaluate the OTA natural occurrence in grapes. Bunches of grapes at maturation stage were collected, and grapes(More)
Several adsorbent materials were tested at 1 mg/ml for their in vitrocapacity to adsorb fumonisin B1 (FB1) from aqueous solutions. Cholestyramine showed the best adsorption capacity (85% from a solution containing 200 μg/ml FB1) followed by activated carbon (62% FB1). Bentonite adsorbed only 12% of the toxin from a solution containing 13 μg/ml FB1, while(More)
AIMS The objectives of this study were: (i) to evaluate genetic relatedness among Aspergillus section Flavi strains isolated from soil and peanut seeds in Argentina; (ii) to determine if AFLP molecular markers could be useful to identify isolates up to species level, and to correlate these markers with the isolates' toxigenic potentials and/or vegetative(More)
Maize and maize products harvested in small fields and stored by farmers in northern Argentina were assayed for Fusarium and fumonisin and beauvericin contamination. Fumonisins were present in six of the 18 samples. The levels of fumonisins ranged from 603 to 1888 ng/kg. Fumonisin B3 (FB3) and beauvericin were not detected in the samples evaluated. Fusarium(More)
A survey was carried out to determine Fusarium species and fumonisin contamination in 55 durum wheat (Triticum turgidum L. var. durum) samples collected during two harvest seasons (2007 and 2008) using HPLC and further LC-MS/MS confirmation. All samples showed Fusarium contamination with infection levels ranging from 8 to 66%, F. proliferatum being the(More)
Fusarium verticillioides (sexual stage Gibberella moniliformis) is a common fungal pathogen of maize worldwide that also produces fumonisin mycotoxins. Populations of this fungus can be diverse with respect to neutral and selectable genetic markers. We used vegetative compatibility groups (VCGs) and amplified fragment length polymorphisms (AFLPs) to(More)
The occurrence of deoxynivalenol, 3- and 15-deoxynivalenol and deoxynivalenol-3-glucoside in 84 durum wheat samples, from the Argentinean main growing area, was investigated during 2012/13 and 2013/14 using LC-MS/MS. Deoxynivalenol was found in all samples at concentrations varying between <LOQ (50μg/kg) and 9480μg/kg. Deoxynivalenol-3-glucoside was(More)