Fig. 1.

Overall assessment of dynamic changes in the abundance of all the metabolites detected in jujube puree. A: Score plot generated by principal component analysis of each group of samples and quality control samples (Mix). B: Volcano plot of differential metabolites detected between 0 h and 48 h in fermented jujube puree. Red dots represent differential metabolites of which the expression was upregulated; green dots represent differential metabolites of which the expression was downregulated; and gray dots represent metabolites with insignificant differences in expression. If the absolute value on the abscissa is large, the fold change was also large. If the absolute value on the ordinate is large, the differential metabolite was found to be more reliable. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)