Early activation of wheat polyamine biosynthesis during Fusarium head blight implicates putrescine as an inducer of trichothecene mycotoxin production |
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Authors: | Donald M Gardiner Kemal Kazan Sebastien Praud Francois J Torney Anca Rusu John M Manners |
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Institution: | 1.CSIRO Plant Industry,Queensland Bioscience Precinct,St. Lucia,Australia;2.Biogemma,Site ULICE,Riom,France |
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Abstract: | Background The fungal pathogen Fusarium graminearum causes Fusarium Head Blight (FHB) disease on wheat which can lead to trichothecene mycotoxin (e.g. deoxynivalenol, DON) contamination of grain, harmful to mammalian health. DON is produced at low levels under standard culture
conditions when compared to plant infection but specific polyamines (e.g. putrescine and agmatine) and amino acids (e.g. arginine and ornithine) are potent inducers of DON by F. graminearum in axenic culture. Currently, host factors that promote mycotoxin synthesis during FHB are unknown, but plant derived polyamines
could contribute to DON induction in infected heads. However, the temporal and spatial accumulation of polyamines and amino
acids in relation to that of DON has not been studied. |
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