Toxigenic Capacity and Trichothecene Production by <i>Fusarium graminearum</i> Isolates from Argentina and Their Relationship with Aggressiveness and Fungal Expansion in the Wheat Spike

At least 20 epidemics of Fusarium head blight (FHB) of wheat have been registered in the last 50 years in Argentina, with variable intensity. Damage induced by the disease is further aggravated by the presence of mycotoxins in affected grains that may cause health problems to humans and animals. The...

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Autores principales: Malbrán, Ismael, Mourelos, Cecilia Alejandra, Girotti, Juan Roberto, Balatti, Pedro Alberto, Lori, Gladys Albina
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Ciencias Agrarias
Hongos
Argentina
Enfermedades de las Plantas
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/66683
https://apsjournals.apsnet.org/doi/10.1094/PHYTO-06-13-0172-R
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-66683
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
Hongos
Argentina
Enfermedades de las Plantas
spellingShingle Ciencias Agrarias
Hongos
Argentina
Enfermedades de las Plantas
Malbrán, Ismael
Mourelos, Cecilia Alejandra
Girotti, Juan Roberto
Balatti, Pedro Alberto
Lori, Gladys Albina
Toxigenic Capacity and Trichothecene Production by <i>Fusarium graminearum</i> Isolates from Argentina and Their Relationship with Aggressiveness and Fungal Expansion in the Wheat Spike
topic_facet Ciencias Agrarias
Hongos
Argentina
Enfermedades de las Plantas
description At least 20 epidemics of Fusarium head blight (FHB) of wheat have been registered in the last 50 years in Argentina, with variable intensity. Damage induced by the disease is further aggravated by the presence of mycotoxins in affected grains that may cause health problems to humans and animals. The trichothecene chemotype was analyzed for 112 isolates of Fusarium graminearum from Argentina by polymerase chain reaction and two field trials were conducted to study the aggressiveness of a subsample of 14 representative isolates and to analyze deoxynivalenol (DON) production in planta and in vitro. All isolates belonged to the 15-acetyl-DON chemotype. Significant differences were observed in both the symptom severity induced in wheat spikes and the in vivoDON pro-duction, and a close correlation was found between these two variables. However, in vitro toxigenic potential was not correlated with the capacity of F. graminearum isolates to produce DON under natural conditions. The progress of infectionin the rachis of inoculated wheat spikes was analyzed and the pathogen presence verified in both symptomatic and symptomless spikes. Even isolates with a limited capacity to induce symptoms were able to colonize the vascular tissue and to produce considerable amounts of DON in planta.
format Articulo
Articulo
author Malbrán, Ismael
Mourelos, Cecilia Alejandra
Girotti, Juan Roberto
Balatti, Pedro Alberto
Lori, Gladys Albina
author_facet Malbrán, Ismael
Mourelos, Cecilia Alejandra
Girotti, Juan Roberto
Balatti, Pedro Alberto
Lori, Gladys Albina
author_sort Malbrán, Ismael
title Toxigenic Capacity and Trichothecene Production by <i>Fusarium graminearum</i> Isolates from Argentina and Their Relationship with Aggressiveness and Fungal Expansion in the Wheat Spike
title_short Toxigenic Capacity and Trichothecene Production by <i>Fusarium graminearum</i> Isolates from Argentina and Their Relationship with Aggressiveness and Fungal Expansion in the Wheat Spike
title_full Toxigenic Capacity and Trichothecene Production by <i>Fusarium graminearum</i> Isolates from Argentina and Their Relationship with Aggressiveness and Fungal Expansion in the Wheat Spike
title_fullStr Toxigenic Capacity and Trichothecene Production by <i>Fusarium graminearum</i> Isolates from Argentina and Their Relationship with Aggressiveness and Fungal Expansion in the Wheat Spike
title_full_unstemmed Toxigenic Capacity and Trichothecene Production by <i>Fusarium graminearum</i> Isolates from Argentina and Their Relationship with Aggressiveness and Fungal Expansion in the Wheat Spike
title_sort toxigenic capacity and trichothecene production by <i>fusarium graminearum</i> isolates from argentina and their relationship with aggressiveness and fungal expansion in the wheat spike
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/66683
https://apsjournals.apsnet.org/doi/10.1094/PHYTO-06-13-0172-R
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