Poster Presentation Australian Society for Microbiology Annual Scientific Meeting 2022

Co-occurence of non-Saccharomyces yeast in the natural fermentation of palm wine in Indonesia (#162)

I Nyoman Sumerta 1 2 , Atit Kanti 3 , I Made Sudiana 1 , Kate Howell 2
  1. Research Center for Applied Microbiology, National Research and Innovation Agency (BRIN), Cibinong, West Java, Indonesia
  2. Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VICTORIA, Australia
  3. Research Center for Biosystematic and Evolution, National Research and Innovation Agency (BRIN), Cibinong, West Java, Indonesia

Saccharomyces cerevisiae has a major role in the natural fermentation of traditional alcoholic beverages. To produce special characteristics of palm wine, a complex community is involved in the natural fermentation process and other yeast species could also contribute metabolically. In this study, we studied a non-Saccharomyces group of yeast isolated from natural fermentation of palm wines from different areas of Indonesia. We collected the palm wine samples from five different regions: Central Sulawesi, Lombok Island, Maluku, West Java, and West Papua. All samples were cultured in media and three of those were investigated by culture-independent method to view a deeper profile of yeast community. Eighty-seven strains of yeasts were isolated and belonged to S. cerevisiae (63.2%) and 32 strains were non-Saccharomyces group identified to 10 species. This composition was emphasized by next generation sequencing revealing that 78.0-96.4% of total sequences were S. cerevisiae and only three amplicon sequence variants belonged to other species in the Saccharomyces group, while 79 ASVs were grouped to non-Saccharomyces. These results reflect the diversity of non-Saccharomyces during the natural fermentation of palm wine which might have an essential role on constructing flavour characteristics.