Ecophysiology of Fusarium graminearum main pathogen associated to Fusarium head blight in Latin America

In Argentina, the main pathogen associated with Fusarium Head Blight (FHB) is Fusarium graminearum Schw, perfect stage Gibberella zeae (Schw.) Petch. Prevention of mycotoxin contamination of food raw materials is now considered more important than subsequent cure. Accurate information is therefore n...

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Publicado: 2013
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97894007_v_n_p45_Ramirez
http://hdl.handle.net/20.500.12110/paper_97894007_v_n_p45_Ramirez
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_97894007_v_n_p45_Ramirez
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spelling paper:paper_97894007_v_n_p45_Ramirez2023-06-08T16:39:10Z Ecophysiology of Fusarium graminearum main pathogen associated to Fusarium head blight in Latin America In Argentina, the main pathogen associated with Fusarium Head Blight (FHB) is Fusarium graminearum Schw, perfect stage Gibberella zeae (Schw.) Petch. Prevention of mycotoxin contamination of food raw materials is now considered more important than subsequent cure. Accurate information is therefore needed on the impact of key environmental factors such as water availability and temperature and their interactions, and the identification of marginal and optimum conditions for growth and toxin production. Studies done in Argentina were focused on the impact of different abiotic factors (a<inf>W</inf>, temperature and fungicides) on F. graminearum growth rates and deoxynivalenol production. The impact of 5 fungicides (prochloraz, propioconazole, epoxiconazole, tebuconazole and azoxystrobin, 0.5-50 mg/ ml) on growth of F. graminearum isolated from wheat in Argentina were evaluated in relation to water activity (a<inf>W</inf>; 0.99, 0.97, 0.95) and temperature (15 and 25 °C) on wheat-based media (in vitro) and on wheat grains (in situ). Also the effect of osmotic (NaCl, glycerol) and matric (PEG8000) water stress on temporal germination and growth by F. graminearum strains isolated from wheat in Argentina over the water potential range of -0.7 to -14.0 MPa at 15 and 25 °C. The effect on endogenous water potentials and accumulation of sugars and sugar alcohols were also evaluated. The results showed that water potential and solute type have a significant effect on germination, germ tube extension, growth rates, germination, internal cell water potential and endogenous accumulation of sugars and sugar alcohols in F. graminearum. © Springer Science+Business Media Dordrecht 2013. All rights are reserved. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97894007_v_n_p45_Ramirez http://hdl.handle.net/20.500.12110/paper_97894007_v_n_p45_Ramirez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description In Argentina, the main pathogen associated with Fusarium Head Blight (FHB) is Fusarium graminearum Schw, perfect stage Gibberella zeae (Schw.) Petch. Prevention of mycotoxin contamination of food raw materials is now considered more important than subsequent cure. Accurate information is therefore needed on the impact of key environmental factors such as water availability and temperature and their interactions, and the identification of marginal and optimum conditions for growth and toxin production. Studies done in Argentina were focused on the impact of different abiotic factors (a<inf>W</inf>, temperature and fungicides) on F. graminearum growth rates and deoxynivalenol production. The impact of 5 fungicides (prochloraz, propioconazole, epoxiconazole, tebuconazole and azoxystrobin, 0.5-50 mg/ ml) on growth of F. graminearum isolated from wheat in Argentina were evaluated in relation to water activity (a<inf>W</inf>; 0.99, 0.97, 0.95) and temperature (15 and 25 °C) on wheat-based media (in vitro) and on wheat grains (in situ). Also the effect of osmotic (NaCl, glycerol) and matric (PEG8000) water stress on temporal germination and growth by F. graminearum strains isolated from wheat in Argentina over the water potential range of -0.7 to -14.0 MPa at 15 and 25 °C. The effect on endogenous water potentials and accumulation of sugars and sugar alcohols were also evaluated. The results showed that water potential and solute type have a significant effect on germination, germ tube extension, growth rates, germination, internal cell water potential and endogenous accumulation of sugars and sugar alcohols in F. graminearum. © Springer Science+Business Media Dordrecht 2013. All rights are reserved.
title Ecophysiology of Fusarium graminearum main pathogen associated to Fusarium head blight in Latin America
spellingShingle Ecophysiology of Fusarium graminearum main pathogen associated to Fusarium head blight in Latin America
title_short Ecophysiology of Fusarium graminearum main pathogen associated to Fusarium head blight in Latin America
title_full Ecophysiology of Fusarium graminearum main pathogen associated to Fusarium head blight in Latin America
title_fullStr Ecophysiology of Fusarium graminearum main pathogen associated to Fusarium head blight in Latin America
title_full_unstemmed Ecophysiology of Fusarium graminearum main pathogen associated to Fusarium head blight in Latin America
title_sort ecophysiology of fusarium graminearum main pathogen associated to fusarium head blight in latin america
publishDate 2013
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97894007_v_n_p45_Ramirez
http://hdl.handle.net/20.500.12110/paper_97894007_v_n_p45_Ramirez
_version_ 1769175809309802496

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