“…As a model system to detect and study metabolic interactions, we set out to compose a three-species community using wild-type Saccharomyces cerevisiae , Lactococcus lactis , and Lactobacillus plantarum . The choice of these species was inspired by recurrent symbiosis of yeast and LAB in a variety of naturally fermented foods and beverages, including kefir, kimchi, wine, sourdough, and cocoa ( Blandino et al., 2003 , Di Cagno et al., 2014 , Lee et al., 2015 , Lonvaud-Funel, 2015 , Papalexandratou and Nielsen, 2016 , Prado et al., 2015 , Tamang et al., 2016 ). Moreover, metabolic interactions between yeast and LAB in these environments have been previously suggested ( Gobbetti et al., 1995 ) and observed for several species ( Mendes et al., 2013 , Narvhus, 2003 , Stadie et al., 2013 ).…”