Can discrepancies between Fusarium graminearum trichothecene genotype and chemotype be explained by the influence of temperature in the relative production of 3-ADON and 15-ADON?

Ramírez Albuquerque, Diana; Patriarca, Andrea; Fernández Pinto, Virginia

Ramírez Albuquerque, Diana; Patriarca, Andrea; Fernández Pinto, Virginia.

Afiliación

Ramírez Albuquerque D; Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Laboratorio de Microbiología de Alimentos, CONICET, Instituto de Micología y Botánica (INMIBO), Buenos Aires, Argentina.
Patriarca A; Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Laboratorio de Microbiología de Alimentos, CONICET, Instituto de Micología y Botánica (INMIBO), Buenos Aires, Argentina. Electronic address: andreap@qo.fcen.uba.ar.
Fernández Pinto V; Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Laboratorio de Microbiología de Alimentos, CONICET, Instituto de Micología y Botánica (INMIBO), Buenos Aires, Argentina.

Fungal Biol ; 125(2): 153-159, 2021 02.

Article en En | MEDLINE | ID: mdl-33518205

RESUMEN

Wheat is one of the most important crops in Argentina and worldwide. One of the major diseases affecting the crop is the Fusarium Head Blight (FHB). It is an endemic disease caused mainly by Fusarium graminearum, the most common agent of FHB around the world. The infection is strongly influenced by environmental parameters and occurs mostly when there are favourable conditions of moisture and temperature during wheat anthesis or flowering. This destructive disease affects wheat, barley and other small grains and has the capability of destroying crops, causing great economic losses due to reduced grain quality, and the accumulation of significant levels of mycotoxins such as trichothecenes. The aim of this study was to evaluate the influence of temperature on mycotoxin biosynthesis, on three strains of F. graminearum of 15-ADON genotype and one of 3-ADON genotype, with different capacity of synthesizing DON, 3-ADON and 15-ADON. Trichothecene production of the strains at different temperatures (5, 10, 15, 20, 25, 30 and 35 °C) was evaluated after 7, 14, 21, 28 and 35 d of incubation. The optimum temperature to produce DON and 3-ADON was between 25 and 30 °C, but the maximum production of 15-ADON occurred at a lower temperature (10 °C) for all the strains. Conversely, the minimum production of DON and 3-ADON was recorded between 5 and 10 °C and of 15-ADON between 30 and 35 °C. A possible explanation for the similar accumulation of both acetyl derivatives by strains of different chemotype and genotypes could be that the acetyl derivatives biosynthesis is regulated by temperature.

Asunto(s)

Fusarium; Temperatura; Tricotecenos; Argentina; Fusarium/química; Fusarium/genética; Genotipo; Tricotecenos/metabolismo

Palabras clave

Chemotypes; Climatic influence; Deoxynivalenol acetyl derivatives; Genotypes

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Temperatura / Tricotecenos / Fusarium País/Región como asunto: America do sul / Argentina Idioma: En Revista: Fungal Biol Asunto de la revista: MICROBIOLOGIA Año: 2021 Tipo del documento: Article País de afiliación: Argentina Pais de publicación: Países Bajos

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