Survey of Freshly Harvested Oat Grains from Southern Brazil Reveals High Incidence of Type B Trichothecenes and Associated Fusarium Species

Autor(es)

Pinheiro, Mariana ^[1] ; Iwase, Caio H. T. ^[1] ; Bertozzi, Bruno G. ^[1] ; Carames, Elem T. S. ^[1] ; Carnielli-Queiroz, Lorena ^[2] ; Langaro, Nadia C. ^[3] ; Furlong, Eliana B. ^[4] ; Correa, Benedito ^[2] ; Rocha, Liliana O. ^[1]

Afiliação do(s) autor(es)

^[1] State Univ Campinas UNICAMP, Food Engn Fac, Dept Food Sci & Nutr, BR-13083862 Campinas - Brazil

^[2] Univ Sao Paulo, Inst Biomed Sci, BR-05508000 Sao Paulo - Brazil

^[3] Univ Passo Fundo, Fac Agron & Vet Med, BR-99042800 Passo Fundo, RS - Brazil

^[4] Fed Univ Rio Grande, Sch Chem & Food, BR-96203900 Rio Grande - Brazil

• Tipo de documento: Artigo Científico
• Fonte: TOXINS; v. 13, n. 12 DEC 2021.
• Citações Web of Science: 0

Resumo

The current study investigated the fungal diversity in freshly harvested oat samples from the two largest production regions in Brazil, Parana (PR) and Rio Grande do Sul (RS), focusing primarily on the Fusarium genus and the presence of type B trichothecenes. The majority of the isolates belonged to the Fusarium sambucinum species complex, and were identified as F. graminearum sensu stricto (s.s.), F. meridionale, and F. poae. In the RS region, F. poae was the most frequent fungus, while F. graminearum s.s. was the most frequent in the PR region. The F. graminearum s.s. isolates were 15-ADON genotype, while F. meridionale and F. poae were NIV genotype. Mycotoxin analysis revealed that 92% and 100% of the samples from PR and RS were contaminated with type B trichothecenes, respectively. Oat grains from PR were predominantly contaminated with DON, whereas NIV was predominant in oats from RS. Twenty-four percent of the samples were contaminated with DON at levels higher than Brazilian regulations. Co-contamination of DON, its derivatives, and NIV was observed in 84% and 57.7% of the samples from PR and RS, respectively. The results provide new information on Fusarium contamination in Brazilian oats, highlighting the importance of further studies on mycotoxins. (AU)

• Processo FAPESP: 17/04811-4 - Estrutura populacional do complexo de espécies Fusarium graminearum e perfil da contaminação por micotoxinas em cevada cultivada e selvagem do Brasil
• Beneficiário: Liliana de Oliveira Rocha
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores