Comparative investigation on metabolite changes in ‘wu mi’ production by Vaccinium bracteatum Thunb. leaves based on multivariate data analysis using UPLC–QToF–MS

Vaccinium bracteatum Thunb. leaves (VBTL) are used to juicing and dye rice to produce 'Wu mi', which displays a deep blue color. However, little information is known about the formation mechanism of the pigments. In this research, non-targeted metabolic profiling of VBTL and VBTL juice samples at different growth stages was studied for searching the pigment precursors through UPLC-QToF-MS and multivariate data analysis. The results showed the L*...