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Wild rice (O. latifolia) from natural ecosystems in the Pantanal region of Brazil: Host to Fusarium incarnatum-equiseti species complex and highly contaminated by zearalenone.
Tralamazza, Sabina Moser; Piacentini, Karim Cristina; Savi, Geovana Dagostim; Carnielli-Queiroz, Lorena; de Carvalho Fontes, Lívia; Martins, Camila Siedlarczyk; Corrêa, Benedito; Rocha, Liliana Oliveira.
Afiliación
  • Tralamazza SM; Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil. Electronic address: sabina.tralamazza@unine.ch.
  • Piacentini KC; Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil.
  • Savi GD; University of Southern Santa Catarina (UNESC), Scientific and Technological Park, Santa Catarina, Brazil.
  • Carnielli-Queiroz L; Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil.
  • de Carvalho Fontes L; Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil.
  • Martins CS; Department of Food Science, Food Engineering Faculty, University of Campinas, Campinas, Brazil.
  • Corrêa B; Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil.
  • Rocha LO; Department of Food Science, Food Engineering Faculty, University of Campinas, Campinas, Brazil. Electronic address: lrocha@unicamp.br.
Int J Food Microbiol ; 345: 109127, 2021 May 02.
Article en En | MEDLINE | ID: mdl-33689972
We assessed the mycobiota diversity and mycotoxin levels present in wild rice (Oryza latifolia) from the Pantanal region of Brazil; fundamental aspects of which are severely understudied as an edible plant from a natural ecosystem. We found multiple fungal species contaminating the rice samples; the most frequent genera being Fusarium, Nigrospora and Cladosporium (35.9%, 26.1% and 15%, respectively). Within the Fusarium genus, the wild rice samples were mostly contaminated by the Fusarium incarnatum-equiseti species complex (FIESC) (80%) along with Fusarium fujikuroi species complex (20%). Phylogenetic analysis supported multiple FIESC species and gave support to the presence of two putative new groups within the complex (LN1 and LN2). Deoxynivalenol (DON) and zearalenone (ZEN) chemical analysis showed that most of the isolates were DON/ZEN producers and some were defined as high ZEN producers, displaying abundant ZEN levels over DON (over 19 times more). Suggesting that ZEN likely has a key adaptive role for FIESC in wild rice (O. latifolia). Mycotoxin determination in the rice samples revealed high frequency of ZEN, and 85% of rice samples had levels >100 µg/kg; the recommended limit set by regulatory agencies. DON was only detected in 5.2% of the samples. Our data shows that FIESC species are the main source of ZEN contamination in wild rice and the excessive levels of ZEN found in the rice samples raises considerable safety concerns regarding wild rice consumption by humans and animals.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Oryza / Tricotecenos / Zearalenona / Fusarium Límite: Animals / Humans País/Región como asunto: America do sul / Brasil Idioma: En Revista: Int J Food Microbiol Asunto de la revista: CIENCIAS DA NUTRICAO / MICROBIOLOGIA Año: 2021 Tipo del documento: Article Pais de publicación: Países Bajos
Texto completo
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Oryza / Tricotecenos / Zearalenona / Fusarium Límite: Animals / Humans País/Región como asunto: America do sul / Brasil Idioma: En Revista: Int J Food Microbiol Asunto de la revista: CIENCIAS DA NUTRICAO / MICROBIOLOGIA Año: 2021 Tipo del documento: Article Pais de publicación: Países Bajos