Yeast biodiversity in honey produced by stingless bees raised in the highlands of southern Brazil.

The physicochemical characteristics and yeasts diversity in honey samples from 17 species of stingless bees of the genera Nannotrigona, Melipona, Plebeia, Scraptotrigona, and Tetragonisca cultivated in Southern Brazil were determined. The sugar content, moisture, water activity, pH, reducing sugars/total sugar ratio, and total yeast population varied significantly among the honey from the different bee species. The highest yeast population was found in the Plebeia's honey samples and correlated with their high water-activity. Sixteen yeast species were identified based on the nuclear large subunit (26S) ribosomal RNA partial sequences. The genera Starmerella and Zygosaccharomyces were found predominant, with a high prevalence of Starmerella sp., S. etchellsii, and S. apicola. Some yeast species were only identified in honey samples from specific bee species indicating a close relationship between the yeasts and the insects. For the first time, Wickerhamomyces sydowiorum in honey is being reported. In general, the yeast species isolated from stingless bee honey samples demonstrated high osmotolerance and low sugar assimilation. Copyright © 2021 Elsevier B.V. All rights reserved.

Citation

Sergio Echeverrigaray, Fernando Joel Scariot, Luciano Foresti, Luisa Vivian Schwarz, Ronaldo Kauê Mattos Rocha, Gabriela Priscila da Silva, Jennifer Pereira Moreira, Ana Paula Longaray Delamare. Yeast biodiversity in honey produced by stingless bees raised in the highlands of southern Brazil. International journal of food microbiology. 2021 Jun 02;347:109200

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PMID: 33894461

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