The effect of non-Saccharomycesyeasts on biogenic amines in Sauvignon Blanc wine and Gewürztraminer wine

Biogenic amine (BA) is a class of nitrogen-containing small molecular organic compounds with biological activity. Excessive BAs in wine affect flavor and quality of wine and are hazardous to human health. However, little attention has been paid to the effect of non-Saccharomycesyeasts and Saccharomyces cerevisiaemixed fermentation on BAs in white wine. The effect of mixed fermentation on BAs and amino acids in wine was investigated using two white grapes of Sauvignon Blanc and Gewürztraminer. Higher levels of total amino acids and BAs in Gewürztraminer wine compared to Sauvignon Blanc wine may be due to different grape varieties. Mixed fermentation did not influence BA profiles in Sauvignon Blanc wine, while it increased total BAs content. VL3 (VL) fermented wine has 33.7% less BAs content than EC1118 (EC) single-strain fermented wine. Similar phenomenon was found in Gewürztraminer wine produced by different fermentation combinations except that cadaverine was only detected in wine produced by Hanseniaspora uvarumparticipated in mixed fermentations. Principal coordinate analysis (PCoA) and permutational multivariate analysis of variance (PERMANOVA) revealed that the effects on BAs were related to grape varieties and yeast species in white wine. Ethanolamine, tryptamine, isoamylamine and histamine content in wine were related to grape varieties. Collectively, mixed fermentation increased BAs content in Sauvignon Blanc and Gewürztraminer wine. The content of BAs in wine fermented by VL single-strain fermentation was lower than that fermented by EC single-strain fermentation, which is more suitable for the winemaking of white wine.