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Survey of mycobiota, black Aspergillus and ochratoxin A occurrence on Brazilian wine grapes

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Abstract

The southern state of Brazil is responsible for 90 % of the wine produced in the country; however, the mycobiota and the occurrence of ochratoxin A (OTA) on wine grapes produced in this region has never been fully characterized. To evaluate the fungal and OTA contamination in wine grapes of two varieties cultivated in southern Brazil, a survey was conducted in three regions with slightly different climates. From each region, samples were obtained at early ripeness and at harvest stage. Eight genera were isolated; Alternaria and Trichoderma were the most prevalent. Within the Aspergillus genus, the section Nigri was predominant. One uniseriate black Aspergillus was able to produce OTA under the conditions tested but no detectable levels of OTA were found in the grape samples. The low overall incidence of black Aspergillus and the absence of OTA on the grapes may be explained by the meteorological conditions at the analyzed regions, and characterizes a high quality of this product regarding mycotoxigenic contamination. This is the first study to fully describe the mycological biota of two wine grape varieties produced at three different regions of Rio Grande do Sul state.

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Authors and Affiliations

  1. Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 9500, 91501970, Porto Alegre, Brazil

    Tiago Centeno Einloft, Michele Hoeltz, Tádzio Ribeiro Teixeira, Verônica Petri Oldoni, Vítor Manfroi & Isa Beatriz Noll

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  1. Tiago Centeno Einloft
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  2. Michele Hoeltz
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  3. Tádzio Ribeiro Teixeira
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  4. Verônica Petri Oldoni
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  5. Vítor Manfroi
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  6. Isa Beatriz Noll
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Correspondence to Tiago Centeno Einloft.

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Einloft, T.C., Hoeltz, M., Teixeira, T.R. et al. Survey of mycobiota, black Aspergillus and ochratoxin A occurrence on Brazilian wine grapes. Ann Microbiol 67, 59–64 (2017). https://doi.org/10.1007/s13213-016-1236-0

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  • DOI: https://doi.org/10.1007/s13213-016-1236-0

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