Ecophysiology of Fusarium chaquense a Novel Type A Trichothecene Producer Species Isolated from Natural Grasses

, a recently formally described novel species, has been identified as an T-2 toxin (T-2), HT-2 toxin (HT-2) and other toxins producer in natural grasses (Poaceae) from Argentina. The major objective of this study was to describe the effect of water activity (a , 0.995, 0.98, 0.95, 0.93 and 0.91), te...

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Bibliographic Details
Published in:Toxins 2021-12, Vol.13 (12), p.895
Main Authors: Nichea, Maria J, Cendoya, Eugenia, Haidukowski, Miriam, Torres, Adriana M, Ramirez, María L
Format: Article
Language:English
Subjects:
Beauvericin
Cell Proliferation
Ecophysiology
Fusarium
Fusarium - physiology
Fusarium chaquense
Gene Expression Regulation, Fungal
Genomes
Grasses
Growth rate
Mycotoxins
Mycotoxins - metabolism
Phylogenetics
Poaceae
Poaceae - chemistry
Species
Temperature
Toxins
trichothecenes
Trichothecenes, Type A - metabolism
Variance analysis
Water activity
Wetlands
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Summary:, a recently formally described novel species, has been identified as an T-2 toxin (T-2), HT-2 toxin (HT-2) and other toxins producer in natural grasses (Poaceae) from Argentina. The major objective of this study was to describe the effect of water activity (a , 0.995, 0.98, 0.95, 0.93 and 0.91), temperature (15, 25 and 30 °C) and incubation time (5, 15 and 25 days) on growth and to evaluate the production of T-2, HT-2 toxins and beauvericin (BEA) by two strains in a grass-based media. The results showed a wide range of conditions for growth and mycotoxin production. Both strains had a maximum growth rate at the highest a (0.995) and 25 °C. Regarding mycotoxin production, more T-2 than the other analysed mycotoxins were produced by the two strains. T-2 production was favoured at 0.995 a and 30 °C, while HT-2 production at 0.98-0.95 a and 15 °C. The maximum levels of BEA were produced at 0.995 a and 25-30 °C. Two-dimensional profiles of a by temperature interactions were obtained from these data in order to identify areas where conditions indicate a significant risk of mycotoxins accumulation on grass. For its versatility on growth and mycotoxin production in a wide range of a and temperatures, would have an adaptive advantage over other species, and this would explain its high frequency of isolation in natural grasses grown up in the Chaco wetlands.
ISSN:2072-6651
2072-6651
DOI:10.3390/toxins13120895